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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 0x076967ed31850e7c2a301918f116faa9fa275035244c49ba92a829dce4e36895. 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/5f7241d3-3e1f-4a0f-9058-6a346a1886cc.json and https://artists.proofprofile.net/proofs/artist/5f7241d3-3e1f-4a0f-9058-6a346a1886cc.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 0xd7171ff120315c7c8c5edbd43efc13c576780ded43cdc27fa4b3c6cb1d3ac1d8. 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/USX9P1071252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f7666c26fb1cc6181a46439c11b6f80d76543bdfea9a85a8bffdb3b4bb80e0. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USHM21205481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382fc845cc969f509d1e8d427a2436186c7a0765f67a32cf9f2ca0b2f67cf919. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USHM21205482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61039b413ea9312244f33fc9e23711161627b5728c06aecf86d7ccf110aae4c0. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHM21205483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d1830e6d1fa2ac92d0c7164bd26ddfb20a4a5284f4d91d60df92486aa58137. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USHM21205484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e91d90106a1a8492cd624bb7ee952b7d6a88a8f60b380204d4ecaf974fe3e60. 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/USHM21205485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462bde938971df202e5268997f1e46d91045e274df5b19388efe68f894f0a13c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM21205487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32595a4535d6da83acd7c301e31ec91f6a3daa63f55ac523016a035f3ec4d2e. 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/USCGJ1928382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6182b40258a5e345596ca16bf3d01f4518dcbe6ebf7ef603c20cf3e4d98bd3f9. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USCGJ1928383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf58481d6897c48c7453988e37192ac67183be7704b9e6f12d66b2a61e1641fd. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/USCGJ1928384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df72885a519e5ac6283b6c595f72bfef3a3a0f432afce0b1c279f7b9958a2df. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USCGJ1928385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bc2be25ef9e4f9f54b8bae2bfa1923277dd609b69536755f02f893511f3dd3. 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/USCGJ1928386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb450db85fbf9097c1c335875f3b77feea6824b3d5b1301284536b5967c8bbc7a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USCGJ1928387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb0d598fd50a145244a5a278f43e23341d0f8619576029a3c82422930c0dcfb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGJ1928388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a33c8c960d9dc88057a86ebd2b6a5a0b4ca5e4f1f4081882107123f84a9ccd. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/USCGJ1928389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf785af1509281f3c14c8c50e98719b95d2a7afb529d216a129b751e090c06e. 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/USDY42235804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6611ef9df6bf8e482d3460577ed2dbe96daf5668881132c8fc36f704449b72b7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USDY42235806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5e4f5cdbeb0d87a1f1f93baf4a6811f329699d8b4c0b286f07cce6bf3154f5. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USDY42235808.