Math and Physics Club are an American indie pop band based in Seattle, Washington, United States. Its members are Charles Bert (vocals, rhythm guitar) and Ethan Jones (bass, keyboards). James Werle pl
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 0x68c9d0ae176a0a3a9ff23fa753259469869886067bff256a6380f68357b1cc1f. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6db24ef9-7d28-4e60-82af-90620c09efc4.json and https://artists.proofprofile.net/proofs/artist/6db24ef9-7d28-4e60-82af-90620c09efc4.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 0x94136020a089160bde6f3bfd1b001921277b3c96d4cdecb89e938e409a5287a1. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USGDD0684201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606ac370cd08a93a1c55d7852ca6ec40b495922b34f03ad3b6a9933e5ac43261. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USGDD0684202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69888a6697d383084f7d6c5dc9c0d370d4a5c8f6d0f1e3c90a20c1ee973f1cb3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:49:24Z), 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/USGDD0684203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e8d99637e4e86522f565ccd98cbcdd12038f3365bd827882313cf6fae67709. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USGDD0684208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5874aa1d62017423b2aaf0f940b748c082f6d48d9debc50e0b76d73ef941aee. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USGDD1085501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d006d0103397b6f7406032a9a84d76cb4225b1ebdd6f6e06407f41aa37625a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USGDD1085506.