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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 0x0aa7a10ce376740a8f21741ca136689ffa623ec4b015e91587b68ef8cccde099. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20d69a1b-0000-49f1-9c8f-f68157022136.json and https://artists.proofprofile.net/proofs/artist/20d69a1b-0000-49f1-9c8f-f68157022136.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 0xc0ea1bbbf6073a3eed6c89b5c25005485de2b228956178ff4f3224c608efdaee. 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/JPZ922409974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8944f8d30a0ec0ba69215a7c3f8d0c5f1114f6ff8078008cbe6fd7b3ea3ec6a2. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/JPZ922501701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1299e0c33e4f5f66720ee12b0f4711684cfcb5cf0f3c5517ae66a7b8456d412. 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/JPZ922501704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f7090c4b06f31fc7a7f207e3b789fd1f524bb589afa0992d01e19f373c02ff. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPZ922501705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa668dd4061112daa2efd2bb229138e012480c54f5c1b81504018dd4151c275. 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/JPZ922501700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8944f8d30a0ec0ba69215a7c3f8d0c5f1114f6ff8078008cbe6fd7b3ea3ec6a2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:49:33Z), 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/JPZ922501701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e6bc9dd52ea2b9cb08884380f92519259fc2aaa326998d41e3b6786b4b63aa. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:04:40Z), 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/JPZ922501703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1299e0c33e4f5f66720ee12b0f4711684cfcb5cf0f3c5517ae66a7b8456d412. 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/JPZ922501704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f7090c4b06f31fc7a7f207e3b789fd1f524bb589afa0992d01e19f373c02ff. 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/JPZ922501705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa677a051cebbb6e464df84010cb142a431e02f2dc9798b867c9d81aeb6557d5c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPZ922501706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c772696b9061a9dc9cb20941ce84ef52bce3317616c6e10e83314c5699a18b. 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/JPZ922501708.