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 0xd8f2992e40e996da3720de6ed58e11ae0b4f82f518813d4e748436549e6127c3. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1816032-34b2-4f60-8d72-55c73f75d878.json and https://artists.proofprofile.net/proofs/artist/c1816032-34b2-4f60-8d72-55c73f75d878.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 0x17b23a70e9666256d49da75b8e344e4edf28aa3401c85661d45243c78b57dda8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFMF2130612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e7a9a4100e0a5e81a4f4a6d0b259d4de347875c9f2fe6d1e5fe94063dfdff0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFMF2130613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf6b9096718f2b088ce07f4e63380592883281b4dfe9a4845bb3a1cd6f6d92a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:57:40Z), 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/CAU118907183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c8f236eb6309a2ea59e83dc9385242b23eb3aecc4f62f248fc731b62b90ade. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CAU118207184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68128dbf5dd7f9fac3e752bdda24c0dec2618e224c057d47b70ece96d713e198. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAU118107185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740b1048cf8febee6b6157f618b0a0f3c259fbbb3800b2e60be7e8fc1cdd3b55. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAU118007186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4ea09e07aaeeee5f23e70eb3c97b9f6d3eaab6b9670c0bddd5e2de3fca4c73. 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/CAU118307187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173b0fefaee0dfaaf91c7c38b0675ffbaa852255014db254ee5592b3606d4807. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CAU118600502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a2d0cb4b0952ee3b390217dad039990eaa9092c38129df1a22b161771e553c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAU118107189.