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 0xec9ad0f334aa3accb52763fa210db4854f4f4319d196b9c90e962ec4639fb3e4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53d2c9b3-8c80-4c5a-a3db-cf5d1d068bba.json and https://artists.proofprofile.net/proofs/artist/53d2c9b3-8c80-4c5a-a3db-cf5d1d068bba.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 0x3e837b70b4b4bf06e63e844cc6170bbb3677ec4beb6d4114df5a0a59ce0ed15f. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ZB2UI2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d36a697eae3c488f22bb00632edee54693eeb3de545c783fd3a0e11dd0eae0. 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/ZB2UI2200001.
This Is That Revival (Live from Freeway Park South Africa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e198e0c73960779e12daab1e6624591bc5d8ebd180bdb322789f22c13db550. 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/ZB2UI2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf8882469cd026c646265099f628518f3d9f0cee6d2872b1868717eacecb4ee. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ZB2UI2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998fe443dbd44acab3542d76e7a4877a8f042b9670a472010915bd33dd97d04d. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/ZB2UI2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe704b97dd6373ebdee0b02e0718395ebe23d21ca22b7501008478314c37ed3. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ZB2UI2300017.
This Is That Revival, Vol.2 (Live from Freeway Park, South Africa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb226bffc87b236d8d72f96955afac117824a25a7fa3b0ae14d433387ea3f086a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZB2UI2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb988542aa9d7e75694aedc59dad3a54a9f5ff4d5d0ace005784fd14aa1edc474. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ZB2UI2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bf689159ff98dd7d6a237233334ece95ff2a6a5c94a67a3a23d74b32048d63. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/ZB2UI2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200a3e89fde2d9dacd40a5a98ca083bb005641db59698678c7dc15f6f7b3934c. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/ZB2UI2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a5807e70094b8a423aecde77fe4dd8df2ff0d713b1fafffc6c4152b705e4b5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ZB2UI2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bf3b049db62a969c0045447759a2f53cae4955c0f929950942a447a66eca25. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ZB2UI2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b03202fa33a5ee0dcd6d85422b77d05cb674afbf2c2b90ed0a3e122fb44fd69. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/ZB2UI2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46393d98446e8bca05ad72899289eb54635ca6550a25c2a1f1fe3fd91b23ebd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ZB2UI2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b51c63fcfa251b84b2832a254c28bdf2c0b1ec9e3ff4e98d8dc4fd2f9bab6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZB2UI2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b57d955975a193df8cd0faa90b99863c2ec1468b8a770022304328a840bf79a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:09:14Z), 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/ZB2UI2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5972171ba6a374dab25f5f2a52abe3d47569c6820237f895daee54f30a80a1d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ZB2UI2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0aec4ed9da7739459b2d2a06c47126bba89e3207c4bb07614e9111adcb5e2b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ZB2UI2500045.