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 0x31fc7e935a77318492bddf8e6643674e4904b971fa44b09ce9e18547f5bf1490. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c62961ab-225a-41f1-b164-45de64bf7e62.json and https://artists.proofprofile.net/proofs/artist/c62961ab-225a-41f1-b164-45de64bf7e62.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 0x13a0ed5453ca5080dfcb9ceeadd620fdce6e99500024872284edc8139a434939. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZ6SA1700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56310339ae9063e8fde9106d238b28384ccc3e8c8b8263c974b1dbdacab53b03. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:44Z), 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/QZ6SA1700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0819c37ff5959ce66f06253f9e87107987095a3fb989de2800f0937a869738a. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/QZ6SA1700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff54a12d76c0b38b6f369834295544a81acd4bec21d84e3582ef3da6d870200. 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/QZ6SA1700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0e8b486f01c6b9b1c41baf3ee739dd14b82bb61230bbf81e30740241c3c3d8. 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/QZ6SA1700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a7d1641c632c9d72be2d2288dce3fe4a827f18683fe619b0b5c7c068de2384. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ6SA1700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d15c7af3b7c848c820d483619baa9e3dbc075818d226f57471fa65e510f9262. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:35:08Z), 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/QZ6SA1700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc44620c3c4856f9ca62c94fd24f3e15d5eb2e298c0653513b5045898e38340. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZ6SA1700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bbff77d356ea931c3e19b732c0e46d76a72330df3ae558cc11d40232a6b7b6. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:06:11Z), 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/QZ6SA1700078.