1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99e2653cf2a0b65f699d92aea2cba05b6b3ccd95019ce6cc941a44446060cd8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebbeb0fb-bae3-4d08-a33b-1a5816bcfb07.json and https://artists.proofprofile.net/proofs/artist/ebbeb0fb-bae3-4d08-a33b-1a5816bcfb07.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188acc021b03ffc47f8918e1f41a7141d3c79f0b6a030de48908f25e8700f77d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPU2227237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8621b570f05bdcc6eec506beb0b96fdcc6f7eeaab74e41574161f61f069098f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPW2386065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81e4731c234e4709a4f93591f966d62a8f3e2b4df3e148e32d6371c26a9ef2f. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:01:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPD2558868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489ef157b01f6f3343a4341538f0be8ebaaa3c30c009a93b9817e53c5dcc0074. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF2543208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf69d7230c97b3696efc4bf6cca9654a81aad81ced11eeda7625bb3bb885973. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPI2581212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f81a41c5d3507997d6b2aaea60f380d09b7d4ee30ffd8e91e0d5d90941431b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92J2401873.