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 0x0a8995e8e93f4a47cd9f149b74753e66a37d75fe82a295d25bb67b3ee5ed2b40. 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/c9f8f9d5-1c45-4813-a00f-8afcbeaebb04.json and https://artists.proofprofile.net/proofs/artist/c9f8f9d5-1c45-4813-a00f-8afcbeaebb04.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 0xa99ad3b9749bb67f6f34245dd7e01bd3af50acf7e763807b70601cd6e9dc2549. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6N1971615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779a3652df80c0916d93e0052a3a558c434cafde8950c0ad84c576b826546d27. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:22:04Z), 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/GBPS83953604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba4e99ba6da363045e7e90e6a694e8119e6fe6afdf45f39660f2b2b04a1f406. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/NL4WT2200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2547e4223decf8d015b5d60d1139700dc87c7eecbfb24e15345c8ba008da63d8. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DGA0L2373721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacad91ca6318d6915cc11f0c6c0c2395553d7bf0ce6394662fd1a1cd7b152c8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:11:51Z), 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/DGA0P2349704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb50d3de9e99d77311e1da469415357dde7ff3be1c25293233f3e9cdf84a7bac. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:57:48Z), 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/DGA0M2420084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c583cff47e0c31da65606b0f25a5059b141c72594d06afc65d1e52be97d6b93. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DGA0H2484451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a6f39b3f08d0376fe58d6e4d2ad1209e78d45dd822652965da35e226eb77ff. 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/FRX872535407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb106196abf8f76e112d76c754ea04bb06ec980ad848715a68cbe310066783ec9. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:40Z), 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/FRX872580856.