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 0xb1a367c0497b78867424d9d27e6fbcb6b9281ef9514f61998870717573de4747. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a69686d6-ea29-451f-8b0b-6959fdec89e6.json and https://artists.proofprofile.net/proofs/artist/a69686d6-ea29-451f-8b0b-6959fdec89e6.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 0x33338bf9e286e26ae243b8a01155d14aaa457662f6d2a76f050eb6c81e21b9de. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPE471900000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33338bf9e286e26ae243b8a01155d14aaa457662f6d2a76f050eb6c81e21b9de. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:48Z), 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/JPE471900000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e2401a01e963290ba3bce58b4b8a39102a237c5d968f1ee6925a82888d0e85. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/JPE471900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e2401a01e963290ba3bce58b4b8a39102a237c5d968f1ee6925a82888d0e85. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/JPE471900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b54c2baba9952e0f2b77dd94e16bf6b3b4934d613adc873733fdc28b86f336a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCJPO2158891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f28b41d322d87b328700317230f7ad942001b1723b25592abad979fec84c2de. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCJPO2158990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b37e5a87cbe5ee19c15143d0d89dd86684952460897f8cd6d5f221bb4860f76. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCJPO2158997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9872bc5c6989c2029110a334273c9e450bddb7e4baf04cb5a8d9b2a0ac66c207. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCJPO2159005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c440962a4f7e5d98131d4378f7c94f8ba5c6a44028738cd11c1816060b99fc8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPWP02100732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084e0410054947a2769e236f079e220ff5d34ef19aff6988863f701be15aee5a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBK3W1901201.