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 0xf73b29b606acf65c303b2d563d639831b75d4b054a90600cb7f0e880cec6ef28. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b0a6dcd-ef71-4560-aaf3-47cb59266b4e.json and https://artists.proofprofile.net/proofs/artist/1b0a6dcd-ef71-4560-aaf3-47cb59266b4e.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 0xd260864f6d782cd46d1d2bf90bd684b0b119cbae4873cc708ab76d322c8b16a6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:35:11Z), 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/TCAFR2112051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ea25de273c66c41015b0f928b28dcb05b8e255ced48409129857031df64efa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:59Z), 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/TCAGB2285596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbaaa5477897391c7003d05e3f061baca18a6aff78a4970aab3f2e3b79c15e6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTV32364734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b7c8ee1c19798f5327455ecf340c54fc95aad2d55211a390ef7860303c86bd. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZWV32342886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366d616f8d0a26bf79a91a177514ea97e96e3711e5e1c1c5c6cca2d1e0c2d2c1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:33Z), 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/QZZ8B2317818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235c255c4f0683c85743eddc0ac2ac878a3d269d425f9b0f47e8d73531d0b96d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWV32439307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf85f611d4424c957c93af1429d10d6f92a36edf6cd81484aabdaf56c59590af. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:16Z), 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/QZZ8A2461417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dd5af1b839ea82aac5e3d8dc3cc722927c28f240b331ab768497b0c84c7523. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZEC2459955.