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 0x684f38e8ed9ba51eb950862e62b777460a1d0b352fcd31715606be34b5a5fa11. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61b9a145-a60b-4d22-8b30-13cdf842ebaf.json and https://artists.proofprofile.net/proofs/artist/61b9a145-a60b-4d22-8b30-13cdf842ebaf.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 0x055881b0c6eb7f2be607d800a9518e1d333b53782072591756f34a4204621e90. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAGB2213953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866c618c017fc46c9154f7ea130563bf20a430ccc2b7ec0b4a0c5ed174d6790d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAGD2242506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cd0b494fa2140610bb5feb311fe688e09dae206492b627443b92f2759b15d2. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:58:19Z), 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/QM24S2303234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005d9449bd3dd231b2f46dbe11a894259f9a9b4e123b4013077728f2abe0f25f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAHU2423614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1162ae5a05c145166d208e280fc25776a7bc34cd321de8ee61bf8de2cbaa5505. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM24S2500859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dca35fc5da4f794142facad4b2bd2c1f0586cd591d19c5486fc415f2c800f9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:58Z), 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/QM24S2500774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c87cff1bc60b424325edb9c94da373ebdeb678507c10e4a073e15db333bbddd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM24S2500921.