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 0x78012354d3984eeb4de55016a7e15e609cdfcd06dc3ba27f505fa5e2b26e3207. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2892c0a3-8b05-43c0-ad6d-30b1aee757b7.json and https://artists.proofprofile.net/proofs/artist/2892c0a3-8b05-43c0-ad6d-30b1aee757b7.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 0xdd4ed1fb280a69ea73bb102c11962239a9cc809113621218e5c6cd910e0b1825. 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/QZNJZ2376055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e165d214f0456ecc2399fdabfb3a9af43be4752a18abb6ffe5227fc745400f. 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/QZW9L2357902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e608991cc86b891210fd0b3aa5ddcf1aba047c3d352a859dd852844b2eecf1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:29Z), 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/QZW9L2357905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7aa152300791e3947e189930a391bb9279f009c8b8b0d73a9f10c4884adcb1. 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/QZW9L2357906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6816103eab311a44d9b277e9aece3bca34b2ef7fa7b97fe6be267a81321cbfd6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZW9L2357896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b7925eccedeab57e36729acb39a9e1e3e57fa93a8a9c35c15960f43211d798. 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/QZW9L2357897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c8c15bf231e79cd4f0e453916f49852f5d8de7137b50e1f5fb5ead8cb42244. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:19Z), 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/QZW9L2357901.