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 0x13e83931fe10cdb59d4a11e0f3414bac923416a13a276d2a5983830884f3c203. 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/f9333df5-7356-4eed-8094-0f8878d2fe55.json and https://artists.proofprofile.net/proofs/artist/f9333df5-7356-4eed-8094-0f8878d2fe55.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 0xd76b1f258e1102bcaf414a1117648d918c98b25c473fd973546f2b684320660b. 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/QMFMF1400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7482f53a028b6eb81fff460b8d049b4384dfe8afea05b1fc9dbcd070932a001. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:22Z), 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/QMFMF1400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa907e8a86fd569dd39a947550ed0f283d06691086522393f57de194ca47d2729. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QMFMF1400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352573ae94dc4b9f15a0c5da7b57494eb93a5198e88281f4fcbb038a4685dcbe. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:14:44Z), 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/QMFMF1400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb006008c82ebcc595dc83a06a24b3f181bac0f91546d24d67b99c382a05500. 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/ZAS712200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bfc9b5b7fc2a224b0a016d548295ca65a828cb16873ec6aba263d7b30f75c6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ZAS712200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9487147f1430e65ff922c4910f8e4e6c4128e195f8d63c0f40c07c622aabdb37. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ZAS712200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca3df47adbeec518627fd3f4b65a6e96969b9b1789665386dc927cf75223fb9. 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/ZAS712200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bbaf20ac487cfde77e61dca52a173d36da9959b61c1186a393b468d042351f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZAS712200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721a7db3ccd6488eb6341a1cd5e0026cb6db2aafee85b507c0038def7cbf506c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZAS712200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af20b5b5f47f77ad6c77069756b890399ca65d0493e735ade10da0c3c04f76f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ZAS712200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d7e512aa86f4fe7ab829da34bebdc180ea4a9a1ffa86fafe0e61bcb22053c9. 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/QZZ7N2574907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4817870ec9b241680c67ffec43b76162eec17a42aebf46c8c5045b101369a281. 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/QZZ7N2574908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2485ed2d0b513100488cb1dc38f46f6fbea12c57026b8d844f14dacc779758ec. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:31:44Z), 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/QZZ7N2574909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3228daf16a737c79707e098b31f3eb5658f8b6737ebddd925df4e18a6c32f31f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZZ7N2574910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb176a8a7c7c1ffd7e9c3ed5f43c64f50cef75e3e4bb5f47b0fd897c977951c80. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZZ7N2574911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace6f80af64673f54e9371b7e262299785db1c0a63f2eb8bca5b47afce1fa7aa. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:59:37Z), 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/QZZ7N2574914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb2cbff6297f708aeaa2ba80e049d59700c96db2dd8dd4c00e8c4ec116e11e0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:02:24Z), 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/QZZ7N2574917.