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 0x4e14e29031916a1b04c937a9dc4b247d24bbbb354a451f086a9de43967091088. Chain 2 (Bitcoin): anchored in block 953933 (2026-06-16T11:13:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fd7749b-efeb-4a60-a40f-28c35999825b.json and https://artists.proofprofile.net/proofs/artist/1fd7749b-efeb-4a60-a40f-28c35999825b.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 0x03b38daa1941afe0c2d5ded0a3e93793d6c48b23b82585d4a4fb4a5915263977. 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/GXD7G2531707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c31122791fcc049acefd80303dbde8105cbd032981ba3410f409f1ceb9e720d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GXD7G2524541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec88b06a8edbce4780255fdaf5e2a0e86b6bb121067d8ed63e42ca08537b32a6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GXD7G2510689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16365717394c558444e35246eec31cdae4db508c228c53ab4b6f601e4fe3c97a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/AEA3A2560009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc896aacd655e47bc62a9f6313d8ea64f567c96102692e12526cc0651a8cfbd40. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:10:21Z), 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/AEA3A2533837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbef2a7dae6dec41e4d8da45fbea10d34210a3b6a8cc77d4db4fad1e3f8691a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:11:38Z), 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/AEA3A2526496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e011d5077370712b3ed7ea6d14cf6b1d900988607c508fa7068400a7d8014b1. 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/SGW502535824.