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 0xb996d451624686e8c40206ae51ed5fa2e86ca8f3f95d25a9da3f3a5c4eecc49a. 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/f6a0cc95-a66b-4d32-97ba-2a73fee9edf9.json and https://artists.proofprofile.net/proofs/artist/f6a0cc95-a66b-4d32-97ba-2a73fee9edf9.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 0xd0702aa4355bde9ad2c084d56ea068da86761dd974f813ab41a314ef63f0b829. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/US7VG1910685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab53a4f8ed5e228f73fbb677cb8de88ee1d5d280b38fec76f17cbcd8c282a62. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:52:46Z), 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/US7VG1910686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d528c3c783e375834ecce0c18b2f8a44b0763eeb86abf28bc17d574ab22c46. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US7VG1910687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5b3cd0b373be8405327e48b76fafd730b557bf7a44bd88bf22c4ba722c5897. 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/US7VG1910688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce5221aaffdf03ae91cbc9b98232025a727e6e1cf05a282e9d8f954b6842eaa. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/US7VG1910691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e97ed48344d5c884edfc7d8b7e524e49a1748bad96d779e162cc715e46bfab. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:33:52Z), 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/US7VG1910692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9a8c3f8f2b9b2fb900e3038f375703871b3bc38488e97a1d91881cd6c48166. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US7VG1910693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773b7f26cd9cc2cab0ea3d2e8a3337c6e34a7efabe5245d1792876f7c84bbc58. 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/US7VG1910689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17801a43bdff8a3713e28f93af53775a78e5a0d324d48095e30f340619804752. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZGLS2031153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e8fa326834d727fd90e10efc52e6af28866b63ebd57e97801fb117f84a38f2. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/BXFIG2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c19f74799878f16dd2d0a7d009031e1c2d3176049d0a1c81a87756445315d65. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZNJV2099296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d1c0acb2a79075da8149f3bb644f2ab26d35e0db57d000299906a2ba6ad2ca. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZMZ92109585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde573818fb0b15b24ecc00cada9d1ced702d1b38a850d46e4702c6853c1caf63. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZNJY2101971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc9ca188076c6f4b581f2b4046f64ec19f21fce50d4fae2582bdc583b611af1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTPX2167286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10ffd803fc8ef5772eb71d8f31a0bcf2a8e09d0e5d76011373a97e33f947c11. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHZ62224682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed3b5f9d1486cb2a5aa4b49ffc481943a916722db06d1d880c3cf6c0a7e781. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:40:20Z), 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/BCS972300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11174ee8e23afcb6b3dbaa9d0ccc2ed49bbf51464974e9612018884f10601107. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BCS972300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d706d6a49410407341858511aa2958166e22b909c442288269f59786a483fd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:36Z), 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/BCS972300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8360faab5fe9ecc3fab251ebfbba31fadde51aaf53a62b52e942410ab37156c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:33:00Z), 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/BK14N2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb24cf31cb0fe31c6631d83f81550f4e1fe19d2e88715aa1eb6c8972b585426. 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/BK14N2500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f08073440926c169c173e4386e9fa97b534f7c267410431fea84049070c7fb. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/BK14N2500237.