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 0x2971756198cc91ba655f613b3823cebc10250acbeea486bd91223a8d152713e6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db6455ef-de14-4b1f-b7fd-2c1b3ae12109.json and https://artists.proofprofile.net/proofs/artist/db6455ef-de14-4b1f-b7fd-2c1b3ae12109.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 0xf7f3f32b633b008bdb5420423ccc3774c1f9da3091f492cc2b8755fff3fa4113. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZGLM1924085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c4665a5b53510ea0e9b3c7bd22159fd17be636a8f48edf63fab58aa67b2539. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZGLM1948395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ff530af82180d18b58af547f396af7df53b8876b3bba6e733ec839f7b5cb4c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:38:59Z), 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/QZHZ62011532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc333158edee84bbe9512924397f82bc9e6547c8d5bb18c3bffa870c1aa91f4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZGLS2100348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d19c8a5f2951a90b6f3d334011adcfdc22e819a848dc947896faad1c26f6f1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:43Z), 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/QZGLS2100350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fe537d962b95cea16eadd6e997e8eb88627f3c11c124fd4b603a557a8a7126. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QZGLS2100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa615ecb93af03bef2bfb5c599af277106e6701e1f62aec17d9cf1dec35b612c3. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZNJX2147151.