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 0xcaa4007676ff099ff36f8faaeab963a7081bd62d13389bbd17fc77ab458701e2. 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/cab5e9f4-071f-4ad2-b224-f4129d898da7.json and https://artists.proofprofile.net/proofs/artist/cab5e9f4-071f-4ad2-b224-f4129d898da7.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 0x94ad15f962929a0ecdecfb0916253301fa7b9200e55bdefbfdc30fc9c68aef54. 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/NLV5Q2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4137b520f1eec742896267f71d0bcb691607972d9955443d58782d69a42d05. 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/NLV5Q2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fbb58b898f4623f0c0eed491f6ba1c0db70c1ac938e9f854fa549593f51218. 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/NLV5Q2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a0c515d940a0d9c483fac5751fe74fed1202eb84f11b7020bbcef26cf51a20. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:38:51Z), 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/NLV5Q2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf172f1d00c09fcad26bdf464887657a04123123eceaaa519e91e3ac51fd37db0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLV5Q2300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1217a905fb6af36ec215598abcdab6680ca02ced2de4b37b0a742ff978a0e728. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLV5Q2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623f5328e08df789f9331d48ee42b929285fd27663c6f4c7bb1989c9626fe118. 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/NLV5Q2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a970b880f75c8acf04cadf4011612cb589e9deae091b960d56b3895d47f3d85. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:49:35Z), 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/QZNWY2419725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9e2716ca59f5d4da5c8b148d4f8bfacbefad4be3b60bcbac949e3c61ecd9ba. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:27:26Z), 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/QZNWY2499153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0c4d9a80a771e79e546026b9a651e603c1fecefb0f325eb0cb2262b54fa376. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLV5Q2500037.