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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aa1a8b233bea4eb12062a3094d27abad7e12ed8ebd0af00cbf6f8004ec17e0. 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/90c3fba3-3de8-49fa-8a69-71c1032d780d.json and https://artists.proofprofile.net/proofs/artist/90c3fba3-3de8-49fa-8a69-71c1032d780d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3000a107708c022b930b7852abb5b33e465f2f1bf735e26f2986db4dc32340. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FIMTA9200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed6570811729a3b7d27fff931703c379bbb23d22a26d9684cf0131039b23636. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/FIMTA9200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444aef49b1f29ad3b21784a059c5388e58473cce8cb4a3a387c95ec44f615f45. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FIMTA9200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbbb13dedc520120044cd78b4e4b68ed77bbf371dc8356ddaba90781e65f5ff. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/FIMTA9200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4700ac57f4b97c59e34724493b3f4a6d4ed60f3c9609622c249a58fc1fa89b7. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/FIMTA9200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca831c18a8096c90e5fd11533000608f64e05f5c392f71dc534036fd355904c. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/FIMTA9400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5042f3fdf84a5964a0ab17617eb01863b90f5ddfdcfdb09628bc3ece981e57c1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FIMTA9400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bf8caee9c5a12ec2147afcb08b7a72b1b6f4217038c74185c57386efa8c84a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FIMTA9400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c41ba720a3fca325463d0707a13d5194ac169e8029abfbc184dd8194f5c958. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/FIMTA9600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad3f90d10a86855de3586913bdde9b7207649f53e1e3ea0cb85ad8f1010caef. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FIMTA9600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b028bb15c82abd89c3c7e7977f08e29bb4c02b92db45411100f8326eee9002. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/FIMTA9700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628d9e501444195c23c7d6e8164572ddd15b12fdc7a53eacde8cd5245d46dc64. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FIMTA9800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f69d1ecd1897eaa88e0f9ae718373a92937f6a419008ad78add5c71856925e5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FIMTA9800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938e584b0e5ea0415571caba7dbf45773ce1cbcbedfec45bdfc3fb2b77967955. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/FIMTA0000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d55abbc232d3bd982ca4619f5f2ce24518f8a74051c55e084c1669f83530651. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FIARA2014029.