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 0x14b480e151745420b2bf96937af95d3fbd28c2c7185d93803360cf84cc63653d. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f025bf70-4e87-4e1d-a33d-c5991d42b1d8.json and https://artists.proofprofile.net/proofs/artist/f025bf70-4e87-4e1d-a33d-c5991d42b1d8.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 0x8a9b0adbc0ff41cbc161a4b3c2b7530d9909fdf04ea13e922c1ae3fe9690cf83. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:24:45Z), 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/BGA472023549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25e7c642bef7d3118988fa94f4eb49881c6eda3c170768bc89c772e80580958. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBSMU9069631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f8341f43a023036b1df38977a0d420c8236d8d7ba8aa23c7ca08c68f8bee68. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GBSMU9069633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3792ca816217b42e47ddeabc629f38c9892df3e34768ac68bb9927bec78428. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:00:52Z), 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/GBSMU9339459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411a6d34338b87f4e44afd20b2d5dad6a1da50b0387d8d38b39ae2fee6902294. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:57Z), 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/GBSMU9339462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb7eb991ac015342758dcc6c8454deb16f5cd5c647a33ff4c3e3d760387fe28. 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/GBSMU0052674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece94bc93dffa4f7a07ceebcda680f5d2a7c298becbb8309f02073274d439875. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GX5MX2172964.