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 0x5f377f10ec36f10da938a49cdae9763a410410fdfd6e52000cc8efd8a77d7293. 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/39b9228b-49f4-4371-b077-0bae4fa5268d.json and https://artists.proofprofile.net/proofs/artist/39b9228b-49f4-4371-b077-0bae4fa5268d.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 0xa1f0e8fb044df6441c29a47b698a668722042be2f4553a055145a38cd05f659e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX201617810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4f91606031acfa765a07be04f02aab9835d003365ec15315dae71f7ed22fb4. 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/FRX201617811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2929648b8d0358991d64b2cdc4d5514ba5d2b83d4c95421214115e9c6e887b07. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEZC62501894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae57dbec6ad0659383d29b2b2828fdd71c611ce9f5e8e45cfa25bff23d2fcae. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEVY82400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ae51c45878d7eed8ca436345a8b0505d9b1bb4c90870e173ba96d620023ab4. 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/DEVY81900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e61b1a5a82169f0738e0f77419b8a7eb33fdee533b797631f8ebe41fbc5d284. 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/DEVY81900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1171a1afddf3e591bfa6e79fb252e554ce5a23aa73400496e4dd88feedbc98b. 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/DEVY81900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16116093e2ac97669165ba58b2fa977a7a8dbd957e72965b48a1298d66e3635a. 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/DEVY81900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0881ef777fa85d62b0bef40818993651eb8c5903edf7e55c543b74c85f742450. 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/DEVY81900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ce21b660f74d407ad6d960658d979abb5311c62ac422ea8e9a168d8899afb6. 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/FR2X41636233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e12187f65d443a3526b494df711fd777bcaa33d21596e8cf75054241e038cf. 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/FRX871571091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae57dbec6ad0659383d29b2b2828fdd71c611ce9f5e8e45cfa25bff23d2fcae. 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/DEVY82400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c170d010cafe9e78b6f01ca19e1b15745afd62b9d604f7220e8ebe6f4b8c8e. 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/DEQ121745364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebde0182e94516ea4758c657d1ed5afa9b24f38caa9f8e865555a87d9be98e8. 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/DEVY82400389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46df688b7731f67385a891189de48870d9a8d4454d33516d6f1446cd4ca5dc66. 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/DEVY81700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc496d25918f0595b7eda8eca59a012ac005437da109351f07a5ad89da141354d. 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/DEKE51300666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de3fd41672a827fcca758f200b22e1711376b3fbc13a68b23f79953c1cddb49. 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/DEKE51401333.