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 0x3d7f71c1d826236e6e071f22a940ad2e9ca050188a2fb733389744be7b1fa88c. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62984968-a10b-45d5-b7bc-12370a013b6a.json and https://artists.proofprofile.net/proofs/artist/62984968-a10b-45d5-b7bc-12370a013b6a.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 0x1afd65f9da79ceaf6ca11723f1e3a3013abf96c34c12047a5039afa4f63dd53d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFYY1973154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de5193fb67a0175a5cf6ca8bee8723b5f355130b9d6acc7b3c4cb78de0b243c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFZ72078990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108cab91846486c254d04225d2ec48f10568442e5efe336559e66dacb1261d51. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEU2076560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ca3136771ffd3e26c84f4951969204ae4c58dcb380690213ddd1bc59b93dcb. 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/QZMER2065901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abbbbde0fb05e04e66075d2cf30861197ccd3885705bc51ac0e66ef36a8af04. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:54:45Z), 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/QZHNB2387143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2b0c799dd5e0f6aa1c180ffb3cd36878765dd49c57b780775ea671bdc2782d. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:09:30Z), 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/QZTBC2356739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591fea1a74e92743ae51ae653775a512b90cdf7104d3baee3bfafd79c99c6155. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN52416436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6d17836c5c59b83090a8128c5a02a97a9cee33997c08132312ba334a1ba883. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN62498540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd55173a6e2ec58c1d83423d1a98939167d06d6ac1c75fde3a2453f14329b29a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWW2460159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3601e15a88451a0bbfd923512962221808423861083bd151317d441f35393a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2407090.