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 0x5be5215885fcf712e3073d83406d0a528e562d7d7fe25e1086d9b39fef629a50. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7bbda16-59d7-4cd0-8cf6-a505b3783c06.json and https://artists.proofprofile.net/proofs/artist/d7bbda16-59d7-4cd0-8cf6-a505b3783c06.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 0x61f47c9ee37c0f1dd96a5be87a849c8170c21b0405894f8203e4b3820220d0d4. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USDY41671340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a474f1edd22ac3d764279c834661de322d3cdd52d124621513397eb629b610. 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/USHM81450883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0774045984b4d8c32b797ef9923f4cc59c1837977dd415e7541929bf72f15b6a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:45:47Z), 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/ZAQR42300765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0289bba09ab618c8adab4e53f6e60ebcc5f6c4c36f1a1f6c8a06b8ef56cab8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ZAQR42300897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5616d0e25e7ce8fd25c4c6be1e06eb6bb92c0c128301760aa457183662203a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ZAQR42300892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc7174963cb6051e61bd2a0d63a58415ded7ba272f0b936817e6067631ef81e. 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/ZAQR42300895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fb4eeeb2f7eb740de78b915831cb95913867d283bc9104efcc05f825b200b0. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:41:36Z), 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/ZAQR42300896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0289bba09ab618c8adab4e53f6e60ebcc5f6c4c36f1a1f6c8a06b8ef56cab8. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ZAQR42300897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950f59edf7742ae174b11c36190f1888364897472109f768c315591928c5eb14. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ZAQR42300898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f71576cfb3c0b0a23672f55ff839bfd154dc10115d014270a0908101b21294. 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/ZAQR42300899.