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 0xd691fd62a2ef964766567c68271968ca00dc4ce29fb3f1cd0c89964523452581. 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/96ee38d7-48f0-4d55-b461-7a1613f0880c.json and https://artists.proofprofile.net/proofs/artist/96ee38d7-48f0-4d55-b461-7a1613f0880c.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 0x32c518d8358c010d2e80cf7f84ac9e4663b5d7f4409a89ab2b6a84d29a2a671c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN61992560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa936bcdb1cde7eff3bdc5746fc1c3cb7f77791794d4c708250ecd1d7b78860e8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNA2096231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a136773d7f8ea164c7a360d6162f311629d4d52b94efdebdbd3925244370aa. 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/QZHNA2096232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599fddcc6f876096de0f7fdfa5cdc2b37a2248004a0ec30103fc23507adc3a69. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:41Z), 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/QZHNA2096233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad2480f1f30452323098d64521695f998d1979d72824f8c2a56f73d418c7ecb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:33:45Z), 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/QZHNA2096234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe392dc86c3005fe8b2b9ac6a7872555b9ea9b8a3fe72a603076c364f9263ab9f. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:43:40Z), 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/QZES82058588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1459f4a1689c199e67a8fb503f43c5f8052dcbbd6733387944a3501afd3d9c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:26Z), 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/QZMEM2346235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb766a1b20f2914c6473a7459f6cb2ba505d8fae914b84cd46923d94d676b981d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHNB2476644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6327eb397368ce6ed3deb0c26cd4d9546da108aaf93d42dfb1025ef93f9600. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ62125787.