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 0x733f0bb1f742bbf8b3ff872940e6a604ef844e648c5c4a5e81306068128c9cf9. 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/09b1c8cf-fb56-4f16-b327-8f4f10c5e579.json and https://artists.proofprofile.net/proofs/artist/09b1c8cf-fb56-4f16-b327-8f4f10c5e579.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 0xa1973a9e1d6646e7ed7a53883be174cd3694f2a7c004b477370cb1654811e109. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZGWX2217478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5d4779e22c9a5e7dae67ac4ad2482d019e4bf053e8bcc8084c63a64a7e4c21. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZGWX2217481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ab047bd99a4150c332933bdb8bdc2ec704eaa595e0d0e1f8111c759504aab8. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZGWX2217486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1fbc04dd30c793060128855251d0d0f23e56cadc446d133959788c8ee9f6b0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:56:42Z), 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/QZGWX2217490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b27a170adb676c146d82eaa0b58281b4515acce3eef0aa9874757c6b61b5037. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:14:15Z), 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/QZGWX2217492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeb31ac1735d7b800cf53098c9fb1afb5110ce34c50a5fae71496f89ccab5ef. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLAX70922970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc453b8fb7832ecefe825a276fe4ff0fed40116115dea8a9d6f2973cce7591f9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLAX70922971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ed66101232d2c96dd0710dac53b77f73832bdff4a7d4d29790e5e1409ca983. 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/NLAX70922978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4b5ddf834963a43c0fae978beb4e7f2eb2d95a9ff5b084f60d02d8c9c1e235. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLA349300409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4b5ddf834963a43c0fae978beb4e7f2eb2d95a9ff5b084f60d02d8c9c1e235. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLA349300409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6779855f588ebc2140752c65ed1f3726d63a8046deead023612ec2588a9624e0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFMG1319019.