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 0x87bcff7846ea9aee7eedbc0f270d3ac05f9c3beb7fe2496171486ce0e7a2c037. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9856238-473d-4602-a7a5-c6447d1d2666.json and https://artists.proofprofile.net/proofs/artist/e9856238-473d-4602-a7a5-c6447d1d2666.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 0xcd444b0f808513835076655a861abe75d18a18ef88e1e38dd04f29d820305bd4. 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/DESG92300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdda07f0c9592c6afe150a7dfc2304a759bc59206e8864662ca7038ad9bb2827. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:29:03Z), 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/DESG92300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c7fe56a2d95ce44ba6568f728d323ad321d9ffb313411369389908e9ffc356. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:37:46Z), 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/DESG92300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7355886aac6de6e8adf4da20b89a1d5f18868d1f6d4bcb648dda06613360a42c. 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/DESG92300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e9d888396160e9934eacb255e06af69f36a7e26fbd240c569aa2952abfd034. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/DESG92200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ca4e40fb8302411bbd2a2138bd853e6bb5dd9a9359650b9e0fce636fdc9850. 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/QM6MZ2263124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40018471b0be87b7286e575e3af25f8ee172f92dc50a389f33a0e517cb74b0cb. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QM6MZ2263131.