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 0xd273dbd9f9ff578da79462a3522423fb113896b96908884003673b9edf84869e. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66738d3c-eccb-49b0-aed3-558466fbd3b5.json and https://artists.proofprofile.net/proofs/artist/66738d3c-eccb-49b0-aed3-558466fbd3b5.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 0x1a889c65b1bcc8fd3e9200cb3665a30276413698ae778894ea334c28977481fa. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/CAUM72100558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e77f5a6fdd0f2240a642dd64795b0de0c9663b9da3e2b84bbca0eb2781cfac. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/CAUM72100559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384a98b85160bd5930e7cab547f5714293e4008ca6e1cd9be5e5e56ffa5fb659. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CAUM72300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437e1b75301ef8b906609764df0a681e47d26bd94423d2a4bcb7f3afbe6b0a66. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:30Z), 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/CAUM72300604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384a98b85160bd5930e7cab547f5714293e4008ca6e1cd9be5e5e56ffa5fb659. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:38:17Z), 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/CAUM72300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437e1b75301ef8b906609764df0a681e47d26bd94423d2a4bcb7f3afbe6b0a66. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/CAUM72300604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8ecd5f5fbdebd5d965aa2779ffbdbcec76aa1dd452c376c1670875eaa8abc5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:24:49Z), 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/CAUM72300620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894c4ced5dac4634fe0f2e8979fe82ed3329fcd1dd7dce3ff9c99608e789e962. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTGW2406479.