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 0x14ffabb935b48bfe54dd7a1fcd54a5b895a19a06dfae5b0315629e5098a261b4. 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/3c94e373-2fb4-4614-8362-88af9fac3d04.json and https://artists.proofprofile.net/proofs/artist/3c94e373-2fb4-4614-8362-88af9fac3d04.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 0x47296664249b009dde3fa75d20be5777ffbe239c9fe3b93600f81509c7f21993. 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/QZK6K2124172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8469d3f5de30f4ef2196d7b6a75798a5fb8f5b8770cc65387b03039cc285ca1. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZHN92436801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdb07f151a1347c21ea4dc17bde1f6697ae702e1e2c51d0d4e4b6eeaadec1d2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNWY2401304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbb5f82790f379f9bf5edcd78e5846fe37eae0659eb7ed16ce76248793e4745. 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/QZDA72595590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481e30e6f1bcd0945890f9e051bcd8b422a05620946a755185b752792b31941f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZDA72595592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab94f0f34c5d533f7ee643241ef2736142868f9d0082311f1d390549cc2df6a3. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/QZDA72595593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb040709318b84322c2dc126a808b970de7b56a6ee509c87b348b4c55ae0d8c84. 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/QZNWX2584214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328812c2bb3fb554f2f1152ce71b60675e45a1739449cf35085139f0fcd5fefc. 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/SE6XX2509022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc476d02a3b1935fb21c48a495d53f26b04e055240a0c740669ead79ab490fe52. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/SE6SA2506511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc9360950a131e0ed487e54bf3c7830e67201114428fe4d83420b3e79e5bca7. 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/SE6SA2554172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bc68ee2e8421bc654d9e7b00959ae141090a573ef8e930ba02c2036e84aebf. 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/UKZGC2203267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e9697d1c423ee6d907b318c667ac47234f74efc32b5491f300dfea420867ba. 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/SE6I32305482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4504818fab21fbef37cf641c098ef2179cf98eb228a210aa403e35fdcf9e79e4. 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/SE62M2170223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e94a7776bac75ed2f8fb3d996c8ab50b231a2eb85b1febce597529e74fde0b. 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/SE6QE2385546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecda00cda4658a5930942ca0aaec89b4aae260b49ae71d6c784d72edc2872dd. 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/SE6SA2353785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdc2b3142695e190b6948b3395aeae686242fdf229281842ac27da398478e70. 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/SE6SA2435487.