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 0x051b59cfd2ad9f3344270b65a7e35183517f9db6969463204d3210ef053d0fdf. 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/43a04838-9927-4dda-b048-9d1531c17449.json and https://artists.proofprofile.net/proofs/artist/43a04838-9927-4dda-b048-9d1531c17449.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 0x11b0860095c4e9fc3008eed5ceb034cf08f0b3a08d1cce065f727f11ee2471de. 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/TCAIL2480851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e54594f329d9e059cb5810f702f4d2bbbd153991bb02c913a6997b2980e4d5. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TCAHG2368394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59539fc030655002509b9117fb0d63cc3af11eb9e2148d0022921e536a5927ab. 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/TCAHH2328149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9755a15d1b2818529ebcae5b79b3e5a859c89a06e5f61cf86b9373371d80c221. 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/TCAII2488375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ad49138c73cf5382a595fbed5cf500343deee5a8e9b1813c049902756419f3. 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/TCAIC2457806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1024b491547f0197337cb2168dcb2bfc60e596b4313823bf298755d29d249334. 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/QZHN52480149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9555f93fc53ab35533a58f5dccc412827ef3178bddd5fc8b3a9e9d47f1b7d7c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ72473755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4b0d94932b2af4b2548d334ef9f4ea306ba2951c92bef10934e85f2c16ac35. 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/QZWFN2342887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaf621862fa223ce7f2eca33142a3964d9c9d36520010a968ed800eb505638a. 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/QZWFN2342888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ef6eddebfdec60c6b03f90d11c83e07ff58b9d12fbff18629ea7390af8502. 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/QZWFN2342889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0621cae293a0801555eede1522dca66b646888f5b17db920eba22a0e958d4d29. 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/QZTB82343220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dc2ea720389a6ae7a91ec075efdc2d9efe8f477a6c3387acc1fe59e51b38f8. 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/QZTB82343221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd747a0f8d500522ddb04d6ef4a34b515471e8ede4486887d885e4225cf821865. 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/QZTB82343222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e90cdbf0a56280e9b19a3ba1e897c91e1efe4e9f80acfea5deabaea6333507. 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/QZTB82343223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae3c12e0e9bf8794c79a0602d9eed8fa36c1286851d97b44c673bd0abf67773. 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/QZTB42365823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234adf6d3f1c4acdaf1a28f0aeba835c4d20966b1a037ed3ee03dabbef810c2a. 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/TCAHH2369834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5392c19c8ad8cfc95483819d80c8e3cdc9e91164fb2170ba545338e9210f14. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZMER2383767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3bdb5f5fdd50f770c609cbdb928a6130fd8c7e194144d383a3f885721887e2. 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/TCAIK2483211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbb43e470fcec4c685542418e4adcfe8dff09e48278c83b41aca3a8cef36317. 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/TCAIL2483231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6339310fcd025594ba3765297f832c33518ba2fbd2a737beb6d8451b3b5df4e1. 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/TCAIK2483249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f1636a7ddd714a1ecbba8d3d48132232ee4757dd2c9a401f971daccad74c9f. 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/TCAIK2483260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b2184e968bc58b71c441e0e09dd1627dae837d6760a02182659b540ef9ebdb. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAIL2483332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8572896845dc5aaeece52000c895c518bbb9f69768a0246cca33e4cf9832bf. 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/TCAHZ2432203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e7e8af4c699b7a01c18d453879d71fdeb599913fa2faa0a1a56057287b97de. 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/TCAHZ2432219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c66922ab88cab439b8936abacabe6945ea4c966262662a073afa69bb3bcd483. 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/TCAHZ2432230.