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 0x6008eccc7b6b49745590758d9c7f78a74cfdc89b176afb781bd935befdd74c74. 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/5209e942-6346-4f68-b4ba-25f3a8cf90aa.json and https://artists.proofprofile.net/proofs/artist/5209e942-6346-4f68-b4ba-25f3a8cf90aa.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 0xa8f45bb9860571d11426f82bdaa4dc522f18fb6a13ae45f62fa6c9db21ac300e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/AUUM70600195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa6d3b223d19972d0e688d4de6afcc7bf3b5c97903c30002a2bb26c67b449b5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUUM70700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f45bb9860571d11426f82bdaa4dc522f18fb6a13ae45f62fa6c9db21ac300e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/AUUM70600195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba7ea7c8b93aff45cbeb78b7e0a879b00fd2093b7861ad7f79462411cf6b87c. 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/AUUM70700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82af86bf66daa766c4043447278d800051d626abfc9108e838dd94e928d836db. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUUM70700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4719b8e2996c7930067e44be8751f4eb499d90e51ac13c3568ad7c9d7c225a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUUM70700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a0959fcced51430a8b798c5a14284daf95bd02aff58a02136f9e0f4a6fd77c. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/AUUM70700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa93381b64b1af3939b4c2995568bfa8e60dd7fb85416f846a6937a9a447da52. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUUM70700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8d0e75199080268226be2071491c25392515d8996e4d67ddf2a5fa3925e973. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUUM70700073.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f45bb9860571d11426f82bdaa4dc522f18fb6a13ae45f62fa6c9db21ac300e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/AUUM70600195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68259e70d3d807ac719c08a2ee2ae2dd0b325612dbbcc94ec19b2f4395bf9399. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBPVV0900357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa52b85d5422561ebb0f07a17a4c8f07b6f42a6f0468afdb0111b2fe27d9b67. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/GBPVV0900358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b4480a353939ea439e4c127d5bada1b11e54bd6a2c43a370cc536feb70e511. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBPVV0900361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afe15d6842583474fe6b122bdad305acfde3b5747050d03b6800120c8759204. 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/GBPVV0900365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82997e0a11b6622768df0fe87717592cab045d0bcd362aecff6d3398c1eaeef. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/GBPVV1000446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e69296b30714a4d59cf65d186d3d8f110930d65eb73effecbfeb1cec0a067f1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GB7QY1300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa6a8127c7e616a62c95347de1905bd9063b27a50cdb91c5d43ee4bc2172bb6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GB7QY1300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988051385f3011927b8196736b06e2e210047a36f8a97ec5434f947bd2eba49e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/GB7QY1300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eb7d7c996a50df4131019babd84d663ccc36223a935c0970d297998d017c9d. 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/GB7QY1300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b98716527fdcf4b4a9e81de2d083e11e2e8201fff3b506432579109b47ac0bf. 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/AUUM70700142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b98716527fdcf4b4a9e81de2d083e11e2e8201fff3b506432579109b47ac0bf. 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/AUUM70700142.