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 0x5079e6e4ffc6e772fa7d79ad0ea59154710b5fb2496c066c4e1debee97fbefc1. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b918d928-3dc3-49fe-b2c3-dcb9fe136140.json and https://artists.proofprofile.net/proofs/artist/b918d928-3dc3-49fe-b2c3-dcb9fe136140.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 0xbe2e13a3d2922059283a9d831a5b27f51bad64d99c7b2e23e7632d3064e882bf. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/QZWFK2475667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c24948ebee801a751ba43029a5853d7221650e52f0be18866698182e75c2e65. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBLV62423538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2528a13dc3ef8afab9e44f82d6de0e9eb9079a47e3aa371103902ae22669fb. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBLV62423539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3486903a09bc1380f4062c8418487c847c2b8b08f950daa1378e9489b010b8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:27Z), 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/QZNWZ2572963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e9967208d0a3b29107a5c823aa785c03911c10f3f27a1795056d46a0a00cdb. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QMBZ92537331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc840876696ad03042b68a67a8902422f6d39421fd19dbe83beb8dd3eac6b34. 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/QMBZ92537332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a716dbb66e3a6c3a27e62aeea4d545d4c1496ab32603f7a68638f1e813b357. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/FXR952563522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea67fb2383aa3a1cb97ba467348741f0d518716acc043c6e8688eb730194f57. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FXR952579875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf954be7352d09a707e64c3664e1c45b1c14eb83dd00945203ca549888f8b6c0d. 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/FXR952561997.