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 0x9ecde30697e8aaa45cc31ad486256eb1870a738be355998a18b8092d737e2630. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b185754d-4ed6-4ae1-9575-49b0d9a3b8c3.json and https://artists.proofprofile.net/proofs/artist/b185754d-4ed6-4ae1-9575-49b0d9a3b8c3.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 0x8646eada12454a851416291ef38f0a9e829b581da9ce53964884271b23af4ed5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX53U2078844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2aa753e3cc54d70eceb482bf886bc59600b3ca35333b1c96e4d07274e41437. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UKXN22264961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ec93fc75607c9f1258582d8db23aa6957294d742beb751165cb603503dddd0. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GBLFP2323319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bbef1ddfd65db233dc58f36ae7f75e2975f696d6cd0a5f5b5aa8b6c653f7de. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/UKXN22303658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b2b98c9f74616a5912dd6f9780fec9098305985f7e608ff945fa78fd6e2b1d. 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/UKXN22369513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18e3a406c38740727fbaea59fd2c08fc25ddac75b61bf73b88486df9c841ceb. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/GBLFP2487005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef522cb40e72430822931cdf3668e8b460bdec05bfeafac8a55bf5a4cfb53610. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/UKXN22435229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069cf1cb818f6715f800e22e4a818e473b1d6626fb00535659adf2de04c1c674. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T12:00:36Z), 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/UKXN22493087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2d076d7dda7d023bb40d27f05ac4ec8dcdab9d1937e4d6e09a7ff3ef67ac16. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GXF9Q2457617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa317713cf79cad600a1f6e98a0728bed038c06969f62cc5dd3b9898124ae74bb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GXHAF2505601.