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 0xb6ec6c9a27df97e63360ff4077175eb031442a888b5273b5674d963b19ff6395. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a3dbda5-cc56-4f65-ba10-953c15fad1dc.json and https://artists.proofprofile.net/proofs/artist/2a3dbda5-cc56-4f65-ba10-953c15fad1dc.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 0x679e559b4eb58a255141923cd4bda9b076d135fe8637a3cf5fff97d47c41c7d5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEKF21800848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8096ff726de9af7d713b3f56fba3ad090db80be1636ac59869db815a7987490. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:58:18Z), 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/DEKF21900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58f97f6fe0ed930187198200537a75e40fe5103127150bf7f6ecc6cc3e9c428. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:03:22Z), 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/CH7812050539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dca60e93f6f5a5bfe84f3805113e11a9335ddfe2ecc3800644f0916b254fcd. 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/CH7812193132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820fad34a01865e83697753f61f5695b5daa343d4c2d2cf0d70aa31e2837984d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:11:46Z), 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/CH7812223023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711f285ed6f23d58f4a04b6d034ed6687c7e546fc36165632f3ad9270901489f. 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/CH7812239794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d713e6dc6b7d55479ebf240b35bb47a45c09c200046a0da1279503b2a35f96. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH7812527595.