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 0x8d4363833374b0cd38e0588302996c843428e05b87e8454e2f3f28840cb87335. 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/2371206b-e3ce-47a7-9956-d6515e0a0f14.json and https://artists.proofprofile.net/proofs/artist/2371206b-e3ce-47a7-9956-d6515e0a0f14.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 0xf3277b1754537284b4b672c030603271c4e1b34c73d9b0c1e3b0f2e61dcffd65. 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/USZZ81210097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15584f567d7a8965e298cc2c438a0d565f02967d42b663240f99cba628b9b4b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:31:11Z), 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/GBDHC1305302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bb061802895c048a1c64322847ce740fccfa16cd0eac16c39d139ea916e70d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:46:42Z), 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/GBDHC1305304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49de4808c31abe2054dd26c3f4efec6e214cfd37dd418b58add36c94d33af8f. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GBDHC1305306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b8ed92058a97d22c684bf67146e3a2630e5af53dbd41e3dacc03d5e73dcfa3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GBDHC1305307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13deeec6ddf2b0bbb5dbbab6599c017a5ba1faf0d0f0163fda27fe984e6085c8. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCACO1610481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d63bc25d4c03000f201c35b75fb0d4b6d4eeaa0f7268462e7fad3bba97409a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCACO1610488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597948ed8edc8d7396e1920c7261aea7165369290269337e905fca21a9b51d17. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCACO1610489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0624c5db1a7c5b3e74ed06e56b67412ae248301d64569549e71f1707539641b. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCACO1610491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6221e4f6b0b3666bdf4b80d7c40ff94e610d9d83daa6d1c5ff39a3a7f0758185. 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/TCACO1610495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348f601b951e453fd46af178d835298801f765d49cdcae7886d2d0211f6daff4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBLFP1798916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151f25d325fce74f7a143438bd3adfb58caf2123b2c72af7c5a7b32e56f5b870. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/GBLFP1798917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654f3d190867c7519b5f3dce52e1b840689094c45caa799c5811ee653d45cb82. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/INH512015917.