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 0x4dd9cbf41e97348b41b29815e3693ac796f54cce5700846aa08e47f3a2289d6c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/440260f3-bf61-4e1c-b9e9-be554a7d2aa7.json and https://artists.proofprofile.net/proofs/artist/440260f3-bf61-4e1c-b9e9-be554a7d2aa7.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 0x134354dd56a51b5877df007a2961d54b9ef83b5b20748806621ad4a80d852e79. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:30:57Z), 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/USHM82447398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22b08387bcfdd01e496d40c47a5b6dc70d891a5890df1fca18784ad5bfb0f4a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:29Z), 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/USL4Q2433297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f45f929ef8fe8e5ce5ad59115696e890bf747117c1a0f408bc0d31857d17daf. 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/QZXLZ2400958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57685e2b3e0a9843b43bec1a54e9a9791b98891bf32e57d40ff7e1f1419df29. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:38:01Z), 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/QZXLZ2401747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6600c23bab5d3fc105d5a723ac0a2d3bf329c23f8fccdb6b74ccc2f052591235. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZXLZ2401749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465dad6ec58cbe8d2a01f980410eacb1cd3ff2ba06bffca60a37d2fcf6858988. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZXLZ2401750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6100d128e3fa8e34235f8c3350419f393ca499887de13b81d62a449b3367867. 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/QM3DF2415711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173fde8c6033a6fe82f1567caebdc7379bc3e8f7ea624b5a630bbff333429935. 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/USDY42505757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9996cf89720180c5945c85d01c96cb3e0776fa059470524e19cd1fa8c19c81d9. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USHM22538572.