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 0x5de10bb63b3bf2d7bee40dcf976b996f2f3a23a2b48ae01821301a2c1c1e3839. 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/7b250f83-1773-412e-bc5c-1d97c5edc284.json and https://artists.proofprofile.net/proofs/artist/7b250f83-1773-412e-bc5c-1d97c5edc284.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 0xdb6b21ea52b1f6c91079d85bf947b6c2c213f8b1be6d3c3a0da6781e08686fdf. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/US94C0515104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09ffbc587493e7fb260b86fff6bc5443d44236c9e7d784a2218140da891fcb8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US94C0515105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0b1a77e77e962e91b349dabc31faab9f0de952163817c86d5104fc315887a9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/US94C0515107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f559892f635f5c04f32aaeb260648ee45c6e2bb72af37d16fca6870e4f182d. 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/US94C0515111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffe9605a0a5abf9a6b0aa8631b255ca40aa382c4fb8dc7993861f025e39e1d7. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/US94C0517405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9125f299791d498aef99e3d15a9543749fc933d0b13d9bf6f4030971d101ef02. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/US94C0520101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff98efb983c99cafb1cdaf88a8e93d7f54d41d841503c5d81cde1f74fb2fc1fa. 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/US94C0520103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232b37cf8a25803d5ed9143a3eca6370aaf54e4b3d88d0e3a7a692ad3ec7d744. 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/US94C0520104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd3ac2046c96280d9d0a236b35a0b0eed81520c208023ef848bbc89908c1261. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US94C0520105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cdb052697f19d1751352e72dd196a1890abf9d14c880578a9c85d3b227d791. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/US94C0520108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea3f9b09e106eb76c5ae5adef72caa81bcb0d5fdca7fcac22ecefa4c31cba64. 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/US3X59311601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4d3384decaddeee8388ef494ed22c8e26138a34fd69b8ff0710004c7d88693. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:46:13Z), 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/US3X59311604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd99dd5a91008ed2682243be9b7b98633cc7eab58be420d6ea073071c46b28bf. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/US3X59311605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365152d77ea553a404c007d70c68f6e1319dffba0491d9b934b31bdeec757140. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:40:17Z), 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/US3X59311606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdcb755d3f8c841288950c3622a7ea92b8e7af31b9b9a796f20a00b8b8f23dc. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/US3X59311201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c001facdc84042e36040fbb6e09c91dbf2d235b444d5f411f629b37562519e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/US3X59311203.