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 0xd590b25b54405dcf919031507e19a8c460b2a58e9ed93955a48a905a33e78b83. 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/41b65095-24cb-4222-b7ae-6eee7323a8ad.json and https://artists.proofprofile.net/proofs/artist/41b65095-24cb-4222-b7ae-6eee7323a8ad.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 0x8755cb73ec1c9f7636dc280bc4d9e61a963d8676f5e4e219ea6f97575ca72ffe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR96X1992464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e81116c046867d5059b55b8814dd42576bc7726a6d14ab27aa45f9da41387b5. 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/FR96X1992465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dc2798f328bfad10da2df61fc6253a18d4aa6ed11e925a554891752068a3bd. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/FR96X1992471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a023c1440e83ee1e7be5f4bf40226334b08ee9a5ad60568cfa4d1f48cf2220b. 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/FR96X1992475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53dab8f558fd904eae6f02028ff2a0093e77ef4f806369e8dca4d41d5ff8740. 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/FR96X1992476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5b03f17eeb13c2c36f51628baf281e6e523addccfbef65f8e73d90a381a616. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRS182139657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07929f1e03c9875b6f4b8e1e61074d8feffb08660d161fcd3131cdbb0f51eaf0. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/FRS182139660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a9bd1cad811c1409827162d4248ccf517281537847cbb956ce1889bd239308. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR96X2505809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd63b64a4ed7de101b464505d39bf04238ea461c5caa69b003f00b4bad3c3046. 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/FR96X2505810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafecb3ff0c34694fe047a9e6e4d54882cbe384ce7a4415b06fceafc815e3fb6f. 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/FR96X2505811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe68976e7d632c35498cb8f8612ad294c85dd54c23eb4c0c2791621342e2303. 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/FR96X2505812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77672d3003c96b42d6f21192f962acdc65d45368c9d6328808c4239704b3a9c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FR96X2505814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64391ffb628995ff8b735ec088c9196d9e4a88732148260a49afa12609ddcabe. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR96X2505815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b2f063baa4e5cbd3798b7d041623af2349cb032f68d003eb3c403440e179ed. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR96X2505816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ee0c10c0ed03ca8b781650a945e2a21c4bf8fc9abf54fed5d7e7e72a45f92e. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/FR96X2505817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e67d836bc2d4eb954ac39f86bab49c9f1caf19392f4dcd6f8698cbabf85e12. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR96X2505818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadcca596511fcd0a0bd24a8b1517267cf64f3b067f6b9fdca0e73924d4e6e14. 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/FRX871514823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0e2aa3167658da2bcc5d843a565390db3f5b12e30d80b6a015b31f92f91840. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR10S1457712.