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 0xb01bb3d66ab34c8415823633edab9df8d86cb06ac43a8c521097a52e479383b3. 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/3770be2f-f777-44bd-a4e9-de7bece99de3.json and https://artists.proofprofile.net/proofs/artist/3770be2f-f777-44bd-a4e9-de7bece99de3.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 0xe99b450f6f58699a095231e9903572e205cd0957a188ac3327b1b6f8914fe313. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GX5MX2323177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aa4d3e538b8d1f1dfb0ee7480486d81940703d5e906c1a96480a8b898e2ef2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX5MX2431880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa790a1e7ede5928f650f555044b1543a03623b54a2bd93eaa2fc911b2b09e038. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX5MX2433952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa158f30773bb510c6b17ce081a1acbde0bce37ab616b2b170636fbe72c574910. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GX5MX2438417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07331919e0f405b9fdc425d7f4042c7908500931cb1f10223603411e51455134. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX5MX2408775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e759b893a9cbd2c8c4a416ba779e76003ed8f8ea5894288dea05e2da27e726. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:03:57Z), 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/GX5MX2406465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90525ca376235e461081b14b49bb3d8006fd6ee926da4596d32b8bd6622db1ea. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GX8LE2506993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29828ec16bbc015d5f4d6b76686fd985f7b69942e6ebfa5a55300506c84f0ef4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:23Z), 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/GX8LE2561867.