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 0x9cb06392f8cc742467bb9d30ac1da17bfcba1992428e0b434e6b3a43644ca50e. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82d824fb-15e3-4621-8b79-430b37afbbd8.json and https://artists.proofprofile.net/proofs/artist/82d824fb-15e3-4621-8b79-430b37afbbd8.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 0xf307b8fefeb93e935251faaa464180e01b85c2a66ea0b1d18cc43ded726eac70. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PT4CA2130473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f259ac8818bbae1466c6d8f3e66dc12524d6a99bfa342b5e42e9da93344bc1. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:08:35Z), 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/PT4CA2130474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa641f1bd230f65d73562a9ce5bde546cac374bf1b00e5feb855f13bfcee0a18b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PT4CA2130475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bddfc9664b19fc48f523d6b72a0eacc8bb4ce517def704b7bad96ba923784a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:46:18Z), 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/PT4CA2130476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc2f9145bc8fa4c630f1a739a83bcf01abe9c5877121716aa69d66f0c20a607. 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/PT4CA2130477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdc84bf2e230fc12d457ceb8f1d6cba611e79608409ec68584236f33de62a6f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PT4CA2130478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2ac7019b3f1a24186e2b8fb6f1db55901f2348d15af11b00428c759be7650d. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/PT4CA2130479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348ddb6e4e93f2a4e15ab6e66336573b570f7989f1f73d0d6c2e4d2fe0dae16f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PT4CA2130482.