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 0x57ca152131a2ae72cdfc7553525bebf72e70a7a2fe82cbe2a37013b7edc175dc. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bca47a26-c402-45e0-ac6f-21c4fa30e3c1.json and https://artists.proofprofile.net/proofs/artist/bca47a26-c402-45e0-ac6f-21c4fa30e3c1.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 0x973244440732d959065801fa37f69d07298fc0d838ba3a4fcb1d75fba691d78c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:21:35Z), 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/CH7811711064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b48fee7d1a87a9bf34cb6cfb47ac466380bf26bc6191aa7b8d5ab2e6a51138. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CH7811711066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59e26d7fb97cffe91baa895521d612d3e89ddd479dc6594699927ca9d162a6c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CH7811711055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7293243778217ab90b288642f3f8ae07a9a75bde7d7df354d5f4b883bcad71ce. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:01:49Z), 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/CH7811711056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bfa5b684a783fd103b5c2010af9cd3ec4809d7e82c8c76f9f658d40e01895a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:43Z), 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/CH7811711058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6d66b2c164cfdedb3eff256ab66e183cc94a6b938aaffd10da007aca868ccb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CH7811816229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f334d214e67ff0f92f831c734702948151f09e3a69f4eb39652544377438fe. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CH7811816232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4154dc70984a28e104c93181c02913af5131a2d4e417d651715267aec7dfe9f9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CH7811816236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4897be763b3c7b48656e4285639b5dd397ef7477986ef0d338132ba3ec13a82. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:32Z), 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/CH7811816237.