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 0xa218c77281628e49e9b3748d392bc68f9605ede41805e2aaa2b64de2ff5741d7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c822b90-cfc4-4477-b25a-e820be82512e.json and https://artists.proofprofile.net/proofs/artist/7c822b90-cfc4-4477-b25a-e820be82512e.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 0x184f15e8e99dcd1a1d56bacef984eae3eb62676e6f14608d57b4666c5b38b1a4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPX2351814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a6dfa9971002aca64a70b8b8cd7e9b04777867acbfa5dad232c5d9a2172dda. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCJPA2443012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae249df2d51b3168993ab5a600048a84cb1409a4fa80ba13cd93b4c4ddabbd69. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCJPA2472601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3320edfa2144dfa98f61015267542402573eba44b3ea2fb07e02795468924253. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:00:11Z), 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/TCJPB2426784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852238cf17ae5407d50020ee2507744bf44a5b33cbfdd3b1f4554d99da4bc11a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCJPC2469492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c6bce0bb299a99caa0ed1aff696807b95971fdf4b79765472a3b82e1271058. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:34:18Z), 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/TCJPD2432670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889b7b8e3707bd5885dc97fca701166132af3ff5476d8feaa3a3c75f08df336f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPD2564151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e170bc4dffbd5323625e7809e193830f17c0ef52d5a7d510756a987a42dd16. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPD2594312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e81d7947d8258104c6cafee51a0b04e9724f032e2cf1b3c386fadd5354d1fcf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPJ2525174.