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 0x4a2302b6b3647b55e2cc3219a8d8e85829f49f9e6bae62974f5c9939cbe99e1f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e37379b-b773-4569-b9ff-4c70ec72e775.json and https://artists.proofprofile.net/proofs/artist/8e37379b-b773-4569-b9ff-4c70ec72e775.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 0x4111b4b6818e1ea4bb0484e7b8e70b7a413dbbf71bbe74460295f79e8bbb581f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SE6XW2132850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326f905b9e0f80a14389af5c2e14de0891d98f4dbd5af5b634eed3db7e5af479. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/SE6XY2151851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f85e25811299675f4af3fc39fb705e6ce7b24af42c7a8201c72d4419a34287b. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SE6XY2151818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a0ba4a1e93da595ffe1c3c1d3e3569db97fa7b5d8b19293585dc9015bce8fd. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZN882183962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4d60933e6141d55a78c854565b21e744fd54a941459f0217eb78cb2aa6e429. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:35:13Z), 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/QZN882184845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240ac5732efd2796e527d560ca4d91d4f37df343af29ed7a0cb83b4c65dc5745. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZN882187535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3592e7a96200fff674a416c3083e84c221554eba4ae658e1cac2c5b34d9a351. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWDW2211855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42de4039651de341a75c954d0d2dd133bc7240bfc8e22e2e02a3643fc7da7c2d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZXYG2307956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf130141c59901b4265ca0c5c96710b8334167654fd556e84a017ea59adc5e4f2. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZXYG2307955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e4f8359ac116162d0bcfc433e35da95626a9cea176339fbaa0ebae21c11eff. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:45:19Z), 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/QZXYG2401294.