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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ffc70fb3bd1ab730e0513371fb77be4da20d643282100d7b788f7baa887d40. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de8e5f87-02e2-4095-801b-b25df2f885db.json and https://artists.proofprofile.net/proofs/artist/de8e5f87-02e2-4095-801b-b25df2f885db.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65aee50da31994373f3e48291dea6275c807ad733a66643d2fba19ee40d7b2e1. 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/TCAHN2336561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc82af9ec8e7618f02c8b87795eb88a0796179f88ca56d269a524fff6746aa67. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADI1745175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e063fc3378ef7a1053c0f4158138d6247ddb1faee3936a57c1697d896da4dd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADI1745176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d64a4023e7b4c1a643ed1b8807b4d2db01c69a2c364939885802fec9ecd0da. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADI1745178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5de31c83c1af63bfea635abe463888ba28caf36decaff456d4b1ed07c88333. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADI1745179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd264974af62dfd2afa0ce2c36a4f0e2a07d4727df488b84e04ed05de4457b67c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCADI1745181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59f73235c8f4c893238d1175fd2c7363da89a41b64cd3db8202200575ac18d5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADI1745184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c48505c7fa1d98ad73ecca553a6105ee88584fca15650a6a59110359af1c219. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCADI1745186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866061a0776d9734d7f1b0c9b0a92880231df5fcd8d257daeec9664f6d357657. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCACL1683193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a0caeeabbd98ab617b0e2c3e99f11ba329ff8436451232e8b3b0df980b13ae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACL1683195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e899d6c8de089e40c23e4eb24b117b4bf635f5b9f6dac542d79cd1d4b853135. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACL1683197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27a2a0d60ac9c94e7ba013e221b89a5707292d59041b125386a797bcf46f667. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCACL1683198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd23555521678fb350dc6c88d3b182d5830c94994c24d9f04f6a1c469e6ad824. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACL1683201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e35681ff2412894cab8aa642dcc2e3e76513f070c26c1a96264e2821dcf0d68. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACL1683203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df3ee27fbfc9e12e1f024b77e02f02e6fc64039103784fbc9bffbe64f6cdc61. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACL1683204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880c39c554ede8445da99e130e2a675d3d34b08006499b1db8995e94d76494d4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCACL1683206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297ea35a7cf7f5f67504ad32f8ac1a2ed311b8ede3b5b98a34e6a70266cb61ec. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCACU1679879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cb0dd5650c4a98112b4518f8f6ff74beb633989035bbd10fe71fde227c89ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAIR2430664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf857075143bbc93b4473e6884b4b5c7ec44bca9efe9e5bb62639fdee4f69179d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAIR2430681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a58d6ca773f7c5145ed2d0049b2cc6781b5205c4e882e4923dc8172a0d6b3d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAIR2430691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10345223ec89a48f7c39dbd855439c45c874045169670830675bbb4105e94729. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAIS2430714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c2c1ef5bfdf597b87842a508e2034d611295d312e4a5ce6b90eb7d8f7657f9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAIS2430719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01e4ce428406f12d484be059700652da8a9ede3e905d9ecee9a6af45282dcb4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAIS2430725.