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 0xa3335a080205f19161f15ae6fe4c1a426e5454bcea9e6f1988c74bedc58947a2. 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/0e6e976f-8aa1-4e19-9502-3c83db52533f.json and https://artists.proofprofile.net/proofs/artist/0e6e976f-8aa1-4e19-9502-3c83db52533f.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 0x22c901754e26b4bde260da0cdeb4f0bf42011b36f5af03251db439a6ff8ca3a4. 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/TRAAA9500844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48601949290f12b5531af86c9fdd9fbc7980fe94ed212f59c552bf392cb4d246. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TR0011400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd9bec27ff70f82a6efc169d46d627ee87b66e109264c4c1b2edae25149f22b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR0011400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c01e193c574ab229ffbe0403504edc0ca81bc37a9dce615b56226730f1fcfb1. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TR0011300400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3965d875f29c063ddff528900c80c6baa64914b6be3d48a1a120a5d36aae48d7. 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/TR0442430601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d07d4c1350bf64e6c8193378b4e15ab57dae89c6f8b0d5d63b23156f1a6d8a6. 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/TR0442430602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3910e40cb1720742b17e92084055e1b021633630ffa53c5a331704cef9a1e2. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TR0442430603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92991c63e867b5104f260e8fea0ef81eaf6dc6afa5a6261b255b2622755ae96. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TR0442531401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bd680e445cfae0734eb325fde78beef4079d93cf7e58ffb0e44e57acd0dc66. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TR0380606159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440171cecdf2dee6e7b4aa0da8e82aca8ef81aa35a25115fe9d90c9a69248995. 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/TR0380606162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792e6aa705fc5d4abc46c5716833020e5c52e3e8d41b8ed8d8c5483b9757d8ca. 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/TR0380606167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad19fcacb082484b5e3b22225bb1f1bd799e9b24b7bd8a804915bc1a94dd3d7. 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/TR0380606168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd08ab7d0fc53d7c04d37f473f06f0a03ebf0ca84e26bc0947812ceee20cac8. 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/FR96X1675767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd08ab7d0fc53d7c04d37f473f06f0a03ebf0ca84e26bc0947812ceee20cac8. 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/FR96X1675767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9566ad19830681e2191a4bf990c999ba24fd440d31134791c4d6076e40dcfc. 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/FR96X1675772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae857b76ee01bc70e18a71272d872c64c0674983b2d980c956f7e461409558. 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/TR0061400035.