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 0xbdd45fc029ca63ca80d585401b31712ec13508680e7910633b4dec448f32eb25. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f34d9a3b-6d6c-472c-9f81-973b5ba808af.json and https://artists.proofprofile.net/proofs/artist/f34d9a3b-6d6c-472c-9f81-973b5ba808af.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 0xc353657e5086784e22953b989de3fd853cce78d72b8097edc4b28571d54ee3c9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:58:51Z), 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/AUBEC2485005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c7040216f5cb8ce93eb6dec1f6918395639254e9b30c2686ec67ef841c5a33. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AUBEC2485006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d9b4f65abc0b9a689b2c769973758ea46f028eddf488a53162c25caf18ed09. 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/AUBEC2485007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6529b5f34413c9961875a44c5e517fb02c044e7dc9d06dac06e676ac11e6340. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:59:39Z), 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/AUBEC2485008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0a88d374b6d1b126154705920ff5dee3b13ffa20f0f116250d019b2b4d5317. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:59Z), 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/AUBEC2485009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a106ef2712cfb0d2a8585f8441d3b42d25cf458edaf40a9072d602d46ecd0c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:17Z), 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/AUBEC2485010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5d6c2c57fc2b6955535946467552fdad4654eea7fb951546754cb3c082a486. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:46:49Z), 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/AUBEC2485011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b11f1bd9d895d42745aecfc86b03202da8ca0e9060a0f78029e97db85753a3e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:21:57Z), 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/AUBEC2485012.