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 0x68d59d669d3ac5d0c47aff13975d175eae778cc0474da5ed443c3db04849e918. 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/8ef00c9d-7d75-41ff-ba0c-507ba6f4de2c.json and https://artists.proofprofile.net/proofs/artist/8ef00c9d-7d75-41ff-ba0c-507ba6f4de2c.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 0xf673f1b9c9977de58dae14a4ea5a2a9b37ea9d08408ef0af3031ce660a8581ed. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHL2326836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fb0272f8cea840dbcf62f9b54117795c353c34381a36968864a1c26188aab8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHI2301013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0745108bafdb7ffd36c8650b1cf750e8fd82811c3957ec41a80a1628a27f6c7b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHJ2342763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fab694ca524b93110f6d4750d3d6b51e9f44d1f596ef5b26cc329c57c0a6d6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAHN2334546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d0a2f6d82ec73fbc7545fad901eea0fec7eeb06db6eae7402ee82f1116285f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHN2334559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d133368a70620c6463feebefc6cec6ec32c42c20152749d53d1da332d4b384b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAHN2334574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b475ba7b86b53cf4142be540b13f50ea9820120922faf4d68abad7299d84d7f. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCAHN2334608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1120a05ad13aa7b10007da2b40529b9d4b58cb7c2a307ca309e803af3280c6b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAHN2334628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6476e63eaa110cbfbfdef8e91b96f544032ac09355e466be1a3a5ed962531653. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAHN2334637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00108d8813d9397c492abeb5e7e15dcf797796b7a9774e87f0992d0513cca8e9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAHN2334650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf673f1b9c9977de58dae14a4ea5a2a9b37ea9d08408ef0af3031ce660a8581ed. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TCAHL2326836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0745108bafdb7ffd36c8650b1cf750e8fd82811c3957ec41a80a1628a27f6c7b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAHJ2342763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fb0272f8cea840dbcf62f9b54117795c353c34381a36968864a1c26188aab8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAHI2301013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1059e5c8e096c3d9d008e037cb40222e03b05ab818b6dcf1a426e04efe751f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFT2184313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5556ae407c32358b2a549e27365bc2a1d891220f60f222007faa951b6b0ff9fb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFK2123373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a1994eb80c7f7d46dcb0724bf5175effbe26e17c7aef6d4f2251dcc9c9699d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFK2123391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d705a3997ef4991bcf6aebed1dceee8451fd884da537e5540f6ea46e24be4b0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKPL1782337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebc2f6c724637e5fb444f7e608247594487c75c11c512351d5230631c10c650. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKPL1796493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0340a6f86819e0d5bb4c3deba81dfe278beadb463371117ec683e653a47ad6d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL1789620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7ca07ebb70e1dd9e24402a92f4a7ae5d02f486b2ec55c8d08e250e70a6aad0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKPL1802053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9a3d1740627ab4a1cd5336f6790a8590cd888ad4159f232929abe728607a19. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKPL1802052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebc2f6c724637e5fb444f7e608247594487c75c11c512351d5230631c10c650. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL1796493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0340a6f86819e0d5bb4c3deba81dfe278beadb463371117ec683e653a47ad6d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL1789620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39631d524296145e82c9fc84237d4747ea2dc3db7b024a39acecbd4189491e9d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKPL1787731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d705a3997ef4991bcf6aebed1dceee8451fd884da537e5540f6ea46e24be4b0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL1782337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ba2965ff295de47cdaeb6cb145f72a434c4a8137bf531bdb7d3741a6bfba15. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACI1584580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeec02cc1e774d335c96306a1b33908ef7266040db8f8611bfffed62b33f3708. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACI1584581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93b400400ad41383d5b259cd1866fb3cd5b40e50d1a70b91ef12f958780483f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCACI1584582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852adb8368cc494e3398ee03307801279824a3c6f9eebcbcb656ae9d080ea049. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACB1462024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b0965f63744dc572457003342283f53d384ed760c47bd6ba39e6f8c0a23c3c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCACA1493912.