{
  "schema": "proof-tape-public-spec-v2",
  "epoch": "PT-EPOCH-002",
  "purpose": "prove that a later disclosed direction and its two times were committed before external timestamps",
  "token_interval_seconds": 20,
  "committed_claims": "one salted claim for every contiguous token",
  "claim_fields_after_reveal": [
    "token_id",
    "source_time_utc",
    "issued_time_utc",
    "claim_kind",
    "direction_if_signal"
  ],
  "claim_kinds": [
    "NO_SIGNAL",
    "SIGNAL"
  ],
  "direction_values": [
    "LONG",
    "SHORT"
  ],
  "privacy": "the internal selection process and all non-claim fields are outside the public proof",
  "commitment": "SHA256(domain || random_32_byte_salt || canonical_public_claim)",
  "near_time_witness": "fixed five-minute Merkle root with Sigstore RFC3161 timestamp and transparency-log inclusion proof",
  "long_term_witness": "fixed hourly Merkle root with OpenTimestamps Bitcoin attestation",
  "missing_data": "never backdated; a recovered claim enters the external interval in which it was actually observed",
  "production_dependency": false
}