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 0xae3c2fca6d0a64eb2064154c1897f32bea6f6305b89e4012e251870d3a1e6501. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f44d14d3-09d3-4ac8-9127-5ffe959781a5.json and https://artists.proofprofile.net/proofs/artist/f44d14d3-09d3-4ac8-9127-5ffe959781a5.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 0x820fe487612fcf641f177b18b91c972d2e82a45fd4a3bcbf1a4ccc9500255937. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNB2307533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8a9ccf51a5355367b6e061bcdc49d68eb3c0009ffcea626b5ff1440b2355f8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZK6F2366571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cd53bdd908f4c74c230ae2892de15e6b0fb6184365ec09ab6232f7128dbc77. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZK6F2366572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55ce6ef0875b27fc6e8e6c2849a6389629aaaee19088b848c720b62b2b46c63. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:59:29Z), 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/QZHN32020410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f53e5076464f7dc1f5d5c7ca73578a83789688aeab22abfd0d095dfdb2ed0f. 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/QZK6F2366573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0cf585f253b27f81ed3e7049cf9904427abf7d36958c229fb6d4dbb5bbe672. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHNC2330965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8027e701fd267e289a8cafada80c36a1fed6c4af96fef2bd49db09ed489f843c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYY2213803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94e8e4e7d0948ba7635d865ae58757e9be03d7c08405e39009ca1c75621cadf. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZK6F2366574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd23c297fb251e9b8f4fe039d5e1ce8b038e3bc91efe12c8631aaa513e895c44. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:58:36Z), 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/QZK6F2366575.