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 0x5f2b6042fb24c4148d8bc007c0f34c929b3fa99df0dd8ae800d18bb05ac6755f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3566c6ac-cfec-42fd-ba3a-1c26dddb56e6.json and https://artists.proofprofile.net/proofs/artist/3566c6ac-cfec-42fd-ba3a-1c26dddb56e6.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 0x41e1641033481ef2f8c52348c7eeb371be60dae4c97522daa8fbc7a0e0a11214. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/INO131605508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b11ef57280a75458009146ebe2bbcd692181ea7f7a8c744f83a8ac36257ea6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/INO131605509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd30fbc43b6f3340594598c6e425984e6ffd7166f341d89756cd6e209285e86. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/INO131605512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bf23b91b8eca7f7210647fbe341d00fe7d07ad99b0c07d598db7c181c43542. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:50:59Z), 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/INO131605513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa008bbaf264fbb3e782b59eb4cdb40eed78d784c4e478cffba05be41f30e90e5. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/INO131605514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72fd6ae34fa9e531742fe251288ed7e52153aec6b93be9c1b3f3182d1285ba9. 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/INO131605515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03af34d8956b2ef3b83178a23a86ddf92aeacbedc218ce8844c4ef8c4baad2c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/INO131605517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95e0301fbd5634c97e294e3342d6164f365b4f93dd65b6154bd1df232d44e15. 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/TCAHE2338801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4598cd737ea22bb44a9d03efdd165029c12b3977f128e800adc93aecb966b490. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHO2369971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cd066a1929971b985a454ab6d75fd4b2875d2b3afaf5a942ab9f01b24ff4a3. 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/QM6MZ2560253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56b4d14db7960fc954ba70042e8cc099d3a094be513a2a6342147c83ee965e7. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QM6MZ2560254.