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 0xa2fbda4ff91674888e88f12ebb6a8de79511f878a05decd790a07b66fe05c625. 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/991c582e-5d2a-4d30-a5d9-2b6931375a07.json and https://artists.proofprofile.net/proofs/artist/991c582e-5d2a-4d30-a5d9-2b6931375a07.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 0xd5a73d32ea98f9b83e498d3f521b4e9a5d529fc32f711ea15778b06413896df0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAHD2331433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe250e16061c336e8467ee1f4954e175b14bb6b2f468eb30e5980f387319821ba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAFL2134187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf46037c68c91c9e42a5f0ef53649f97a6853fa84cc04db681cd0685418a1cf. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAGT2328244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c775c18cff6cbe90fecc70f4448b0a1646c533ff92945f5c3c3bab24bbca44d. 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/IDB902400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20d9adaaf8712f44ff658d46bd73050beae4ab9b6f03aec62dd55bc72881e38. 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/IDB902300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7a5507e8a976cf1c1d2358cf50d5258e7ec5057fb3613e58fe8e941b95c0f2. 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/TCAEK1975679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d137f8b84dd006cf7c758062d4eb765164e5cdd3c7cdc311e51d1b2edfb8028. 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/TCAEK1924293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a42684ab7eeabc6ba943079e802a07bbb35fed095eeddec5eb85c3b92c57a0a. 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/TCAEH1995864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8977627bfd4a42b23308b04a92f6a7c81c20908e838126dadbdacc0f95576618. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCADY1887253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48cf129b54db87e36a02eccd169440029a3c819ebb6650750273f8ae2010856. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCADY1887254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde77c59e5d57b8a6fe3a9bd0e0cc8bd5832809ba22dbb36397a701aa51065990. 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/TCADY1887255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f400a218784e59ad341f41a34d4db1839e501059befae9f02dd85fa0ce132ce. 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/TCADY1887256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0890107144fed4791f985d0ae024002118d55590a6f045f306ef37ba7500548c. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TCADY1887257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561db4ad0a67b20898911aeb8edd26d87b2e5ba58516771a2fbb736b8ba2ce3a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCADY1887258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72d4f30096df6d570e432f1b885582882033bb837627e95c33906a3a639c521. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IDB902400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c775c18cff6cbe90fecc70f4448b0a1646c533ff92945f5c3c3bab24bbca44d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IDB902400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4194c35037e84b40fb52dd25ff0cc90d44946de9bed94d0f746b04ca612503. 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/IDB902400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0203590f59a5c69c6ddb37bf0e532c89162d4580eee266f45bd61d900765b590. 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/IDB902400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c0e404a33fd63dead1a621510daa36de1075187420d26a6d964a75ba9d9abb. 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/IDB902400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7766abb3f64e8bd58ba372f4dad48ffa652d49361b3968414b99f6dcd6398580. 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/IDB902400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc4d964f4b9feba0d7b6325fb8d623d6c717474d77fd1e9779dbb6777f66b5c. 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/IDB902400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcd23d9104098592f3e0422db896f690c46d017532a049ebd427bd7ff2198c1. 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/IDB902400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db2ea5ded9697611e4a740504ce801780b6cb7318cfb9b48e6efd14523ceb46. 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/IDB902400058.