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 0x1688875df7b78a914cae700f1116d3511418bea6cfb5756a69e53414a32b8ab2. 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/044ca398-ec33-438b-9cfb-ef2e6e73f6fd.json and https://artists.proofprofile.net/proofs/artist/044ca398-ec33-438b-9cfb-ef2e6e73f6fd.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 0xdfd2e4189a72c8deb3193135f370e2638059c04dc7883ed2d9387da37beea868. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFME2452088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aa99146648e5132dceee1098084d60034cbbe1478de3fe60a457c9361f986a. 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/VNA0M1801126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23773cad548f944aec09dc213f20cc9e3aca8bd0880a1bb9f0278089e9fb1a7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA0M1801127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017608ac9850a14c3541197c6b45e95b6765793c440499b359401ebcba7e73eb. 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/VNA0M1801128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435ad933ea1b255df8bc3389ad46d82e43d5f995abfbdb4b92e1b8d3b66f30f0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/VNA0M1801129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce7d96fc16a9f46929194a7b661039ed85955675b2c3ccace13e0924c1ba70b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA0M1801135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcd9326f302aa920e4307ee5cc4a6dc5eebd87d581746da1a05d78c543d2963. 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/VNA0M1801137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a530217042181d3d44e9f4ba5dc7079347eb21cdd154662b12edcbfa6ad3b7b. 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/VNA0M1801143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b36af1c50b158ddc5fd0f5d0b1a5fb4c0a4ff13e89c16c17b1911d30a7aab. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:56:23Z), 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/VNA0F2409292.
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 0x45f552d20e8de22d431656ff31a2b8d15d112ddb0958366eb1371918774e85e1. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:10:05Z), 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/VNA0M1801132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13fe5595e72a64ce018a5a9da90f0ed4d6792bc2922243ab59e9dfecb462a1e. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/VNA0M1801130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6046434e67256c71ef15687deb0bd8088aa75897349da935932dfd9e1993b6a6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/VNA0M1801131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bf7f04923d70824fad3115a3b6cba2b1c354c8ad69e1893f0dde788d103c9d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/VNA0M1801133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3a4268a7bd63d54bd1b93d801ae3d213ea6e4e982277d7edbfb087c1694d34. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/VNA0M1801134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e21303c070a4bb0d7fc61feca040896c5eed83e1dc5ca81b79160489e68be7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/VNA0M1801136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbec65da65bda827c9ec7edfbd3054a39f88b5f857d50125d2af0ae58dac88c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/VNA0M1801139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d1d6017f6fcca453ba447697f92676ae7aaf85ccc9f6a09395bfd0f5efa6c2. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/VNA0M1801144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1def7e0ff99b7240c02dd02795c1a27d80f3d3fc059173429ca29cb2e30f3efa. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/VNA0M1801145.