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 0x07f00ee8713bdeb1feddaf88c612765c5aaf9212dc7a77baf4096bc83a0169b4. 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/e352fa8d-acf9-42d8-9f9c-850e5b0794f9.json and https://artists.proofprofile.net/proofs/artist/e352fa8d-acf9-42d8-9f9c-850e5b0794f9.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 0x265692e83c1e394e3b2386eb6d758810ad043413936cdb578e6a60e6156e9f7a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:34:41Z), 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/QZN882541560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a88297a18cfb90190ca1f85748449bce53674e0af34909ab77a5e8a24a01dd. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:17Z), 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/QZN882541561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af1aff74659185bc07e013d57dc572d85b571c0b753406a88516a3baea4041f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZN882541563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a90e8dfdf94465d3da10750e1c3273d694a9f1c2c057752e9bc19dbb7ede26a. 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/QZN882541567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77deb1b6ee66b0aed39273388c16d048653aa647a39c3cc4fe870d462cd6df2. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:00:21Z), 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/QZN882541568.