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 0xf2d9ffbf284342c7a5ae1d1a89b32f480079f4138e66341962d5550928429da4. 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/fd0c79d9-14f4-4597-9bac-8840b6b29111.json and https://artists.proofprofile.net/proofs/artist/fd0c79d9-14f4-4597-9bac-8840b6b29111.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 0xd77c368acb4efc5b59199d57ccab707a0ec18b77f2fac147e288e477cac9818d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAFL2189888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcf3b10517b96b08964e7d96408093cae8706cc65ff2203db8801ac4ee5afcf. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/TCAFO2115826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e77c25f278a163a620d2903608dfe1f754e1164e85c343b7caf6f7410042ca. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAFX2147057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5831afa9bc3cbf42e03fbb12aafeea334bc77bd17a525ed9ed1ea91d76ad44f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX202232181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcc798af3a723d32429b737e5466319800301016482a04a614b58001fa153ea. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/FRX282224412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a3148d8aa4db2e018d8afec8a6b37eaa80cae7ac5907cf9441feb199070323. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FRX282224414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c017f1720766c4cbdb53b3e2ae83c54b99a4e9ee45bcf6e3b50af5b75006070. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX282224416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b2f9d903b8789d150127431cc8534f235e62b427c78280cf2fe1d0741d7400. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FRX282224418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e96a3ac3771411d0cf252535589b016fb63c482cc562693fbf24ae350431752. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA072299553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5ff71d7a3a2028a61e84a43f99b50816f82724432f46167e55a63d3aa13663. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DGA062309406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e336c8ac52cc094daab5b2ed94f039cb29511845f9b6c51c96b15d9e16fe75a. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/DGA0L2338771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aab8174be477451fca0b98d823c42a7922564a5af8acd23eaf7836e8be7af0c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2X42400461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb92c9b5d70cba6599253616a302620e8d0b9ae6918cdbe1bbb294b0f54aea4. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DGA062472424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfffdcabf6300e48309ca5198e84a6ca45b457d2c90a3948bf2a0abef6e4d70. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA062472425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9f3d783be3f984d701cd3680faf53700d70f1e3ea302194080f99f07e5ceb8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA062472426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db7537bca203a2c75f934971b2957792af8969f386c5055aa6c8273afedfa12. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DGA062472427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde67097bcca85ff1b88445811c7222b9596b9ec7d7555247ec6fd0a8599f8fb8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA062472428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43be2212f4cbe750566382fa20a1e48a8c12c1023fd89f585ced8d2238ffb9d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DGA062472429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29cb2e15dda8ee8f5a222e46b3c6c99a59a4bbd91e059794846da4fc86b13d9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA062472430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5d5ad02a4812082e43e164d14767cb2ad7cf4a5b8a56ecf78437831f5fe14b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DGA062472431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0bac17e90dcc3ff97b05df0251f249fad64bcc49f95b67bf66c33a90284e63. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DGA062472432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc725df765c310bae879a87dd329baa870512e42e7bcde28e4fe552f9653174be. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DGA062472433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d794f22418429907bb6501d04e52db29c6cf5c9de1dd1dce69ed58c65b3a57d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DGA062472434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb288fb32094dee877ebb1c2fd895d48e67700539c5f6453ebd9990d518dc7061. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA062472435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127ddff139aa34ec74f3af7b5708d68f455d35e53c3720b835aa8cd7e2a05d5e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DGA062472436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fd9aa0994cd53ad4dacbfbaebf2d19ce642e69a3248e39c0eabec23a1a3864. 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/ATAJ12200756.