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 0xc754e414c1072d6d82822850e6b340ccab866ae55cbc143363042d335d588f4c. 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/b892573d-b532-4d5d-a62c-9bc887b20972.json and https://artists.proofprofile.net/proofs/artist/b892573d-b532-4d5d-a62c-9bc887b20972.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 0x003c1b8c9bbdc491a8a6257ae5affa0d7bd24f0632b15ee57b8930b01aac445a. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/US7VG1440768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e538be41768d1c4d09437ca19ef3d84a1f4b1ae72a76797ebb6c7cb671bbad. 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/US7VG1440769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ef4d63ad4333657ac7b035729d79663076a1e38c3af2af25e6cfd1f5cecc19. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/US7VG1440770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7ecd3d889379198dc7d1171c9267da0ef607746bffe7ebdb28e3fc561ddfa4. 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/US7VG1440774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa678a920d808af5093cc097d75e2d17e3acc0ac0b914b9e20b26e8ec5caecc74. 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/US7VG1440777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd9b1a04d2f826ac1b0c1c12cade02a7e0d412607f20cbbbe0198e7b30edf8e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/US7VG1445204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8b7b2ebde0cf08df410bc14a2c77fd6f5619ad0581e85e3eaac33537002847. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG1445205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a802c2b75266b4c8d0afa980a47075d896a2efdffcfaedcc6492076c84f9f72. 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/US7VG1445208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8988e76d39faafc1e6814461cd27e2a04bb924838494792db57b3561c02a6cfc. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/US7VG1445209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e828fb6f922ccefc101ac683736f49088d92d996c888ef009a864ef592498a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/US7VG1445210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c9b01b6558589a4de74283c3107186146b793a83654ad1357bf0d936f5b5bf. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/US7VG1445213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2784fcd3a767af3b28f08360d52158d9b1f4c6a79b3a37caa576de7864fce97d. 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/US7VG1736973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214819e330e96188a893d744e1b05f3acd67a67f82e3085bdd78428c5b4f336d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZ5AB1912456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54efb06402a1d3bf632a374d30feeb3e3709fb32488b978d5ba154b42cd2b57. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZGLS1950113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19714a3220dec6ded401abc7baedcccf03420b2c727f48e5334053d6935d2f8f. 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/BCVO92200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c10584d020b80351423fb24cc01492eb7ad021519a4655256ad84d775f62d73. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BKCE22400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3157fb2f5f5c5e317a2b84281b5164b3ee4a6e401efe71927244c49964e562b. 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/BX2VU2400005.