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 0x7f797de501a03911c5a9f215b39cbe7d2583a39e4a974b931e6cf7cd7ae532ce. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb6a47af-b97e-405e-9a44-3a21ddf28eab.json and https://artists.proofprofile.net/proofs/artist/fb6a47af-b97e-405e-9a44-3a21ddf28eab.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 0x573da611f41d3669d50548df658f03367d93ab4efcfc9a52e241a80946d44d02. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:03:46Z), 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/TCAJU2511488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b2a3c5ad37ee85bc9374fc446ef82188f020597d6d34e0c87d1dd05ba230ed. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:22:55Z), 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/TCAJT2511665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04e175db9e8cf1fe6557f53b711165b2d7ec5a3441a14c5a714cb39bd39cb58. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:39:07Z), 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/TCAJT2511622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad17a7c130bbd0224f433cf37836794c91c95894d79407c561361fd524c7b4c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAJW2588123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b03c9eb7611b704853a1a7a389da7623f82fb04312ac09a362f4311c27daf74. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJW2588195.