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 0x6637c1aacf88554445bf261ecf9f82f11baf60f716edd78090bb87cfea358288. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed566e8d-c95a-4663-8648-dba73b68f339.json and https://artists.proofprofile.net/proofs/artist/ed566e8d-c95a-4663-8648-dba73b68f339.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 0xb7be2f453bcaa39734c2ac56e315c1345c2751562e49c376c0227a57a7b62bda. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:59:48Z), 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/QZFZ62207711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda83b957362bb3ef4daaf42595a5566c69c97d8a813b69aa4dc5ab1a779a4d9. 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/QZDA82238079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbfcc27fc5c56c9dd87e6a91f61b3e73ac7ede3b0e5c84906a6f5a6625c430c. 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/QZHNA2297490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8d78b95524dfdfa11dfe3d5bb269bd7f64ba73a7ac735454b54762612525cc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:51:01Z), 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/QZHNA2297654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9963d956d5a5be80d6dd9ac871df7b700e99e4ef71ca39a370f4be315973f47. 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/QZTBA2239625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10105dffdb93cebf2aa6127c08eaba872130548f49de02870a77909b1527ed18. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZTBA2284353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a9f0c8ce00835017d6fc1c31efd896e27bb18de62b026d5e2bb6268f60d197. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:25:34Z), 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/QZTBB2266047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19b14a9643a6d6106cd43f40a5efadeb6edf097a52c599aefad56eb7d2745ee. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6F2326490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cbca55c0d0b4eb35818987f02ef1e64bdbe6731bf264d464b3c78e75dd9722. 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/QZK6F2362244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41959f11f3e6363d69379c721083912bf7e28e05182dc76e919fcffbc4af177. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZFYY2407907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbcb3fbbe263624d427279d9862458f1fc24d20ae8807b6496e6fa77b61c31e. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZNWQ2483512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf7f911e7f927db593bd03cfc4214eabfa29c42301bda5c791e96ef991ba180. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZZ7U2440962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8627590b364197a2c092770bcd68c0d5be724c225d0abbb845d585a33c75d314. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEN2503170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3bbe5c0d9fe6598fffc8a171fd63b72bd2b2a59e420f0541ae763c48f00398. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:08:33Z), 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/QZTB92566165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac22d61c97561e75f5a0a5124489a5b3261ae8a68ce9d774c934777f643cf83. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTBE2562001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81be86777924557627439c86e051b3420aa3b0db04e476d1a99990d0fa5c72c. 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/QZWFJ2509815.