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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a31c706c92a5435f1b6df021b427e1625f78b9244d0992864177ca4943fd58e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22bb7e74-0f84-4571-8a5f-fe69f2898a5a.json and https://artists.proofprofile.net/proofs/artist/22bb7e74-0f84-4571-8a5f-fe69f2898a5a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a8e925bff34d561858e5429689e648e3fcdb7111766726cba28c5f48e00cb5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFYX2276648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d983aa6b719c55c9eb05a8267e4e50ae98a34b0dfa7504c88ab3ed0ab07017c. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZFYX2276649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9435b000c89a8c2ee985b2cc383872e2593252a11be81b5880e7fbe3554714d8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGE2249085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326954ccf4bfdced293c9021432a5c267f7aa7e1e24245cb7bf1294171017432. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAGE2229802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c50678d7fb37f5c77aa977f9eea1eb0669f73fa4b463fcd0d00a81014f38a8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAGG2244107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1326d82717bef1091543de96116fd0b7508dbb477f874d3be579efda1c77dc13. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWR2272527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701a931ac37d054d383b7904c2cbfa2d6c2ec38eee15748e88e91047837ede19. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB72257341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841860d39e02b677d1262654c9df59ba8b0dc3e64c574f9012c0626c104278ad. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:46:02Z), 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/TCAGU2366135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eb476d898732d8c8858dbd1deef35f0a8c9ac3fc130dd16d66c081de3eb890. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNB2352346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328f6a5604c345d228e8d299eb1aee3592be68b6199770304ddb9704bdb9896d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWS2395238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fbb5c6418b377a14bc1415e0238468aab1ffb54854e5987616f205abada0a6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:59:54Z), 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/TCAHS2343071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ea77645d3f798c83b2db5a181ae1d734d1cc7de3fbb4adf3eb2c28c5f9e39b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/SE6XX2565435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45a8c86c2d6b5e500dd5e56743d6d99a1a44ca633f5182736e1740067fb3c69. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INA4Z2200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca179a17b79f76f900962ee050f0467c2533a7872f8fa657afe2898ab821f6b7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX452439018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7904d50d4db9838967c088b597bb952e64ea00fe753a4d2bccbd046fdb6101f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2438582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6101a30459e758480a30cbfaed17d134bc6ca4cc5c464547fffd8f92c370133f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5FN2419794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfde22979c533b27512e75ce0302568f86f27ace47b3937cf74776af1ed65bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6P42423008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbf21237020a6570b16ba916cf1408b36ec285b2da2e1345129282d8fa7905d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INUM72400086.