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 0x3121c046b73ada18a75edd6bf063fc0a5ab9ea0ef86c5ecc16a2f5a32969b37d. 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/8c8b4b12-dd12-4ae0-8e1b-ef12fb8de402.json and https://artists.proofprofile.net/proofs/artist/8c8b4b12-dd12-4ae0-8e1b-ef12fb8de402.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 0x0ccc01e683f746b7f1d7583dfea06bfc3574413a9962a49aa57a73f23f74954d. 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/TCACE1512788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62092285b78036d40883d55703b08cae09f2accf0ea63cdf22efebf4a61acc6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:42Z), 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/TCACE1512801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa456867ea23c46b12ae9514191d305fd241eb962a128b404581fc84cf6357bd1. 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/TCADG1716846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0590fe242e14a98862463febe4a978f424296e6f6cc695d6bb3d1ef216f5d794. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADG1721267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025b04119fd8737a95f8221c87231232c43fdf3a92095b1141bbc7deb397d9aa. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:03:19Z), 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/TCADG1721273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d724b9e34f669678bdec17e45e63fe0910bbc01f702ec05b33a95b65f03e51a. 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/GB2DY2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e794c3262d948719acb99dec74264fd55fd8afd28e3712bce963816a0df2b43. 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/GX3Q92364752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297c9a69357be4860e0b072962f3c23f794e0a85937af4ea19e0085935978c0f. 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/GX3Q92391729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e794c3262d948719acb99dec74264fd55fd8afd28e3712bce963816a0df2b43. 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/GX3Q92364752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b41781bd35aeb2d34300e48eaf85f6ac42eac1e25852f0f1f2ba945489aed29. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:23Z), 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/GBLFP2326332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f315e119e82176331ebe980d6861ae199f7c465a27ebc3750c3a67014247fa3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GBLFP2397237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde543139c40f1f75bac967de74c552f48eb05002626a8fe7fd80c128ad60d50. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR2X42463870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0aeb0cd7ab4222a84e320c5d329aa028545648db3db65ac352df3001c241a9. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBLFP2490027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108795fe941eead29e170dc1ce320da34881f1e416316cdd978b8309e6b5e50a. 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/TCACD1583369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eb6c55b905526429c3bb00f1cbc746b8ae9243b7407f2cbf0c53a37e8907b8. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:00:19Z), 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/TCACD1583390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbb4bf39dfc9191cdb5fa11420ee322a64ad4b0be3633d9de6cd5eb15d98ae8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCACD1583461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf39e19c535b14f88d47d9687d8693ac48a5f7969062013bbbf71b9cc20bff8c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCACD1583454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8c64394c3abad7cf3c406d316068b2e32f1fca95a0145f646257c612c15a2c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCACD1583433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621faa529f647d0b24038e3471401f345bb6393166a1fb8bfb647ac4e401d888. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:57:58Z), 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/TCACD1583403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41b3e40968b50f8925051f21dd3a0b2cbafe108f89378a4b9888e1c4373698d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCACD1583393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2b5d334b17493410a62ca3746a8f2fb7fdf11e37802793af57bfa727eb1dfe. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:25:24Z), 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/GXHG92502805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ffa019103f6cbaae746bb5d257b893dd0f844df31ab1e02f622f2d00d99d37. 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/USUYG1425934.