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 0x93abe21076ba127c2067a43e71627ad989cb343e685f181ca8bbab37ab7b0ed2. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cdef619-2123-459a-906a-52d04b8bf6f5.json and https://artists.proofprofile.net/proofs/artist/3cdef619-2123-459a-906a-52d04b8bf6f5.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 0x75bc4ff9af0279c41ce40828745758f6915450a3dc72cde6cfe46fbf762d62ec. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/QZTRX2468071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780d916b558ba580c238dabc66d1833ef00175f4abce1e79ad2b4efa9920a37c. 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/QZTRX2468111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812c30857de537317a985591962dfae15a0faacd05a3007c4dc80256c396786d. 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/QZTRX2468435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b73b79c9262c25dffd63cf2090bcc76f4cb183f29fa81ba3ee803b6b2b26b6b. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZTRX2468450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab878026fd2d969b323b27fb1122d25a2f08d38b7af48c7494b0f091a8514c9. 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/QZTRX2468468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2418c7ac55f74a102da6d51692f6a703d2840fff2d59c7e9dc827786cb18c481. 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/QZTRX2468661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6471675d585b23c7b8637e90531e33d1ce7c3f53cfef7483221a14d375717d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZTRX2468680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22938b46783d5ede50d746fdf5b82fbd4f8cca71236ff8308ef36b68f6036400. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTRX2468703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ade3018855c85ec40c078e9bcbfd65f90c14efb84da325e432edb60bacde0b8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTRX2468727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f36e787e401034b2028861efdc79a2007adb13904d231c3848be8e97ec61df. 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/QZTRX2468746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1b38db783bab9f6bd88f0342aba5fcb87949c8ecb43823627b8cbfb7cae9b9. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZTRX2468757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe695aadb188609f8211b4ffc42a8842e85c458ff450da1217774c72cbf171482. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTRX2468767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8aad9f8e758d1dbdea3f9a9381e0f69c3b0617797a864aaf3d504a1e57d5bc. 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/QZTRX2468780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7bbb51655ec3513252bfd212c54956b4339d031be58bf5dee5790d3849bacb. 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/QZTRX2468796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ed269b82c4957b83c17a930837b2aa7262f1ff80260f0cc6512b82d34f398c. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZTRX2468811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21e43365661947d796bb4bcf56fd7a09c2cbc163a4a79da6e9f4ce5cee365a7. 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/QZTRX2468827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6b7fe66efcaed40959b445bd5a8725afa63fc9c405465fb272c1f80c0519b8. 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/QZTRX2468842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b92f980fd6c9136cfd50753b5ee8d5addff7191a8d2c274b02cc03d29550353. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZTRX2468899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd161729514836b636664825bf21f25d6f9a97fddeeeedb5236df3c1ad9ed5ffe. 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/QZZ8A2423530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78aa28394d17c16e9dfbfc1179ebcc36f531ad1eb69754a669eaf5e87f467755. 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/QZZ8A2423531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52f99215987148c198a4854c5502fcca5d6e0c3dc1ad493d3dca778ccc20f37. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZZ8A2423532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899d55a242ed0ff6692866cc3bd0e77512f1bed735260fb6c76ab08f9acab283. 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/QZZ8A2423533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa8f89fa7f38c183e52c144b881e17d9818b5eb98a548516a1a5b41ea106434. 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/QZZ8A2423536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5a3481639fe20b3ff4d201f711e0a699e41ac5b5f2dbb41a3b529ee3556066. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZZ8A2423537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b33d8bb9ded0ed99e333463d76c38a0a8ac975aa7286e011bc1b89dd9fd16eb. 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/QZZ8A2423512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b75ec821cf9af1f969bd568415d93f73ce81c558d9cf0c957e84f48a2849fa. 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/QZZ8A2423514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa46088cb6a36e871c0f36ee285396482160232be80c8c05523bc86af993a91b. 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/QZZ8A2423515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b8a8aafc9456068fb8aab648aa2923b8e00db6e691b79c687cd67d7bee9c1f. 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/QZZ8A2423516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d96971e94fc78f2708ca0b3d7f271d73005923621783d60b4546f1bfc579b96. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZZ8A2423517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392e0c18865cac2abcd5ff0d7d94e618ecc0ec2c46771e39beef8d1dd8033e10. 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/QZZ8A2423519.