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 0xfa7c24f8af894d4dc0a6e0888ae38e9676313b1f6ef138bfeeb34a4fbf84fca2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75cfd006-cb79-42a0-a3ea-9a89a03e686e.json and https://artists.proofprofile.net/proofs/artist/75cfd006-cb79-42a0-a3ea-9a89a03e686e.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 0x6f88acbed16ceaf37c206cbf5ce75dc0455a38e86b7dbb55eb0076795b7d5f2b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZGLM2407556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b479f62224a85a10f2deaa811e798165b2ae2f411509ff3fabd8203c44c6530. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZGLM2407561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8999a188fb0163be071faf1ce17d947c0cb9fb231e142cba42ec3f7be7f861. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:19:56Z), 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/QZGLM2407564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4a811c477de7518b4c0685df0482669f475ecda4b02928391ffb88fd1e1c23. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZGLS2430140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee620746071af458469a051605508fe02c638e42cf65151f97fd1802c4eebcaf. 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/QZNJX2489845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1646b884f3af8ad8599b5397704e5a4f13d87762ab84d162f9c79ffc4e753cc3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTVM2433197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c205769c05e0856b0471f75d60a2f945fe5be1e3a8f1394e0ed44f01f17bcd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:29Z), 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/QZW9M2448774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4e33db9299b0b064e40170aa5f31ea9dd92cb9e7ac905f549e5ddb5887c5ed. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/US7VG2536729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9571de049d3337bef1150b0d0aa6f95e2cf41feecb1ab254f358b007ad2591a8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZMZ92572684.