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 0x312ea5d01eaa346ec31d4c56fe6cfa4e9405ee32b524c80b86f55d6f4f230d18. 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/e50cde99-8fda-4835-a912-e5aa9f7929e3.json and https://artists.proofprofile.net/proofs/artist/e50cde99-8fda-4835-a912-e5aa9f7929e3.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 0x8f7ffbfa4c900df6cfe54a6a8c4dd8228b7e398ea60a94452e30499b6964dd25. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLI367052520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37c6ce209622391c0f73f6f47fca61245fe8984aa9c98a0d74da627432a2bc6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:40:54Z), 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/PLI367052550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789d8ec95654c8f05891bf0a8fa483915dab43c979c20a236d01e525c4349c00. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/PLR641800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb271715e7d81a7d2e5e1d964a5144657618a0586dbe2294e52e6b91bf7b14d72. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:04:56Z), 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/PLR641800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3b506df9eee7c29f15be9e1068184637df4094642a9a21b9af45a21b6e80fd. 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/PLR641800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08af10f204ae151aa54184d28026dd03b8ed6f9bf07862dfed23663ec67dbaaa. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PLR641800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d776ccc85648d99314c8b5d68c900483bb7f1bef93995784cde6ec6f05bdf8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLR641800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803a05f8b6e4257f7855c2f91ed76bb896bc1f741d72f4a7b1e65beb302b2aba. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/PLR641800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3eda3956e45300f3879e10777daed0ca28ca3389b9d85d9ed529348220d616c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLR642400027.