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 0xd6b120d9948647f160d0d8d91249405cc8acf47f21ec2b9b1637f8baab9785c4. 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/b61d3aa3-ef78-47fc-83c6-7545b394fdc2.json and https://artists.proofprofile.net/proofs/artist/b61d3aa3-ef78-47fc-83c6-7545b394fdc2.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 0x9d4b7f2de0f5880a8821a1ce7faff682231559d4be11853d278d2f8ca1636ad5. 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/TLVEM2434893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aa4529c44d965949e921cdd57c3aaef34f941b0a591da45a503fc0838e44a7. 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/QZYHM2418364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8320ecb32d2e81cd96c18ec2bdfb91582351a4c65b037423ca884c6010000138. 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/QZYHM2417896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0676f7e3e799abaa253c155d18779559da8571463e1c8a51d952852f057898. 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/QZDFP2114169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f444b15c72b6a6f467b382d7b4de3cb9188e70ac900b73f20c27dc295f7341. 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/QZTB42337302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ca584e2864ca1c2db52ce8337ec016653330449f00332916bf04ed6bd21b9b. 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/QZDFP2050450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc67cef4cd79a323721a5b3087b3bbc18e0289da19c408877bfd372d34f0cf6. 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/NL8RL2429597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b4083b05f2abe5b50c10b47f7702fbb4d8adaf1ab81438387bf23cefeadf63. 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/NL8RL2429599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe053235a55aaed00c337908f1856a570a9e9f088f5cc88c70900c37d87743e. 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/NL8RL2429613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bfa2a3924d2d48f90a61c836e999cc69ea953020cfa2c5d601dc4d1ef84f8c. 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/NL8RL2429630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927513049e41565cc3b0cd6218ced39be273c357e9c2320191bae9adc2d7ff4c. 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/NL8RL2429640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f6297660340480bfaf684d61fc869cf6c1af14b43c9d02c373b1b83df7b168. 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/NL8RL2429641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a1f2b94efa634e270c81fc378c06da708952c299bcc1815b7dee88fcd0927d. 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/NL8RL2429642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25320ab463bddabd2dd53b0109fa1e32b226451165d6ae40d8ddda5db4b4ef72. 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/NL8RL2429644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6993923e5ea4afb63334edf9b170f89787e3a5b099ca826f9286052c432fdae. 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/NL8RL2429646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e54f01368866421422dd9faa5f5a1167f87bd67c929d5047ec93f88e281b26. 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/NL8RL2429647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb89fa72b17490e0e47f3269a81af9c5051e510969f017a803ec2fb1438bf568. 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/DGA082427072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ab6b598c57352ab1f967df38d7e4509be91b8a896991da3c091f6e6d35c4be. 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/DGA092432235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c53b7f137149319ab7c982b999226a06868fb58dd43a502b67c030857d1b7d7. 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/DGA0S2495836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ac83c7649557256f3d59b87b35bcc172133f4472480a0999760fbfb484a110. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0H2490530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c59fe635f55b482778de1a2e90f4a5352ad4162588c584fd297983821b58881. 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/USA2P2504219.