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 0xf9204cd23e22a917df0d149afae520c572616e1fe945920104163ea8d5891a11. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be5d3f7c-8376-4fe3-91b2-0a26056ebfc4.json and https://artists.proofprofile.net/proofs/artist/be5d3f7c-8376-4fe3-91b2-0a26056ebfc4.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 0x6c6065cc19d51ec9917aa2bcc9da9419ea20f0322f1bd8b4a40cfd802bd31d61. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNC2437206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce321d51179956957701590726e0068aa82518f2dd0899e754871dcb7aa1dda5. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZHNC2437207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3700b6014f0492fa94355714f951737eab22f957771fc00e82e358495b9c2b0b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:46:16Z), 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/QZHNC2437208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93be345b7175d9f3fdef9c76acd772f3a1102a963722014e49624083802b0838. 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/QZHNC2437209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad51a0bac63cea502e5aeff45f8208410714d2cac7a2baeb27cbd3409a41e2bd. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZHNC2437210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc242e1a85c5d2aaeab1643a5e8bc17fd83fdd2767f929b7cc8151b6398bb6be6. 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/QZHNC2437212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cc9738e781b3672d28fb7e8fea55a42c4549dd675e8e2606818f83c2600cc5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHNC2437213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a3641d8b018de39eaac53a2f88dfd8e05ade40bc51ceeed3204e7faef33fe0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T04:58:50Z), 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/QZHNC2437214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b4d52cc7427820aa35a5dddd7bbd030aaeaaa83aab273d7328f60815b64d2d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZHNC2437215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba7c2f3ffab5e19a2cbc39dde68d4f09ba9d3457357a8d6aa8d339d2d62b7f0. 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/QZHNC2437217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24dcbd3324f214a1338ad09d335247459417aa906e90296c670347d30b88c5a. 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/QZHNC2437218.