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 0x5f65f08ab457b4121bb9b50bd8eeb4a5b2800f13368c739005c6bc29d399af7b. 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/d72980aa-91c2-475e-8c00-0985129278ca.json and https://artists.proofprofile.net/proofs/artist/d72980aa-91c2-475e-8c00-0985129278ca.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 0x87dc99b767d107a72c48805767bfe30a4e59eeb554377b5c04c8a83504d72034. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZK6K2200919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7bf0ad9bc778343d71d6d13d25935aba957b9c6c5f423ced552604909d6823. 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/QZRP52248590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfa50db1c857560a46bf8222ab66a6a612d02df51c571efaf5a4c50c2d52dc3. 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/QZNWX2203399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7476209dbc4b9c88588dae959b4eddbae69c07d3fdcf72946225fa8dfbfc96c5. 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/QZRP52248591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d37fad3af391b6cc82657af3680c0895117da08e54ed1bf31bdc2d01ad3b41. 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/QZMEN2286336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc426b9d3d49a9316c22bcb7238ed7bca59483ea453e61d37db18ecdf5075eeb2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN92252608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe573e2486baea57419287acc56088ce18a970997c52d6acb2e58938f913fbeb. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZRP52248592.
Every Creature Dies Alone (Remixed/Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06f992b50b895ee9a7a590ca1cca708e4fe94a96a7049281a2d4e1b008d7e26. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZRP52248593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03561e7b67a5414f0a9bfb84cebae36f3c2e7c3e75c0eabc44a96c568ff214ae. 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/QZRP52248594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27c7792b33cfc6548794b8c5fd6c4e08259f97eedfa1f4ce22b76c2e38cce98. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZRP52248595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4bc7d9efe1a63f98b982251ed9aa29f24b34898f1b26edf45801844c10aae5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZRP52248596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14079ca96c47e29f61f8678172badba66a0dc9fced56a8dfa35f60eb0506393b. 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/FR96X1883603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c7d5c82ebcd4cecdaa4e5427178239eedd953be1139b4aaacdd441c9622514. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/FR96X1883604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73457d663904d51bd4fe6502259b67f75e09a388545e55c1d282c1ff2f2af446. 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/FR96X1883605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa044fef9783aaa39f566b2d57fcb830c7e48e0384110cf7aeae63e63abfbe2. 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/FR96X1883606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd5a6ec6a0c9d717a53b3722f692a89d0fc63598dee08f763928bd165b59ca6. 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/FR96X1883607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01f399a23751f4b342093ae57da882b659576db0776eaa0ae6cf5b72d87afc7. 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/FR96X1883608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcc204b0a7e9137a5675c66327a3710bf25c3a6eb47f3118a17587ade852a27. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR96X1883609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd02f23e1fae82914a27e3a03162e3a9bb521c88e085732c43fdd1544621624f. 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/FR96X1883610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011692837727b4fde78c94b50773a71991a5370d519f6caacae369900e4bd4ed. 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/FR96X1883611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cca3724b7a7957aa74a48be55ca60433985d4262230c1be416c9840651f4c2f. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FR96X1883612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e663470c52b5a1425ee53e97c2b0a125a7c8b1b4bd1bb64e92859f4529608f5. 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/FR96X1883613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430d2c4f230cb3629ffa151da764380494377a0747f89e1bcc91b02c8b36cef6. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR96X1883614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc003d0452d9550cef34efd1e641c997ab3f218b13dd665e6a8518c499457e78. 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/QZMEN2448625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab4121781997f9270482f364d3eff16adb7a939ae91f50396cdcde930213133. 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/QZTBD2320259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3775274314b7198224af586165355a64581946d797595b8b88537be2b8ba33e2. 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/QZNWT2339617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d37fad3af391b6cc82657af3680c0895117da08e54ed1bf31bdc2d01ad3b41. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEN2286336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc426b9d3d49a9316c22bcb7238ed7bca59483ea453e61d37db18ecdf5075eeb2. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZHN92252608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc426b9d3d49a9316c22bcb7238ed7bca59483ea453e61d37db18ecdf5075eeb2. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZHN92252608.
Every Creature Dies Alone (Acoustic Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf760f6fb94b651a2c5d29a5a04df752070dc00ebba0737dcedf453b56e0f2425. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAFZ2119803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733458e8bdd5e486daef93868f0e9c780c823759b6e2110a3226a36c90fe049c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCACL1639671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d912d07588314fce9f09c20c1fa8e7fa28233023cf9b4228a4b9462ad87b25. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCACL1639672.