GNU Midnight Commander (also known as mc, the command used to start it, and as mouseless commander in older versions) is a free cross-platform orthodox file manager. It was started by Miguel de Icaza
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 0x86d69178c7df71a6ae0ce9db9536e6838aadc78d4a9fa54ebc5e3b21234d947a. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28da2341-077d-4304-9ec4-e5581ac8f680.json and https://artists.proofprofile.net/proofs/artist/28da2341-077d-4304-9ec4-e5581ac8f680.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 0x0d3d866885cb8282cfc3cdbd5275a4923e87596e5e309aca5f4c6bfeda6d3ea8. 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/QZMHM2459690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc985f123f3d763457a85d005c5fa1563a915b97de0debf5e8e914a4349e8add4. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZS642444778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc985f123f3d763457a85d005c5fa1563a915b97de0debf5e8e914a4349e8add4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:55:56Z), 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/QZS642444778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28022b8f570a5a6628b0f99d2488f74392029deca243c4c6fb94b5c8b95a8713. 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/QZS642440825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c403c3a2d327bd3d51cd91e3df4f4d6462ea4bf9569f5b60b8a5f47a4ff3620. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAIU2401929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9810009391a3691f93e03aa489544d8dde9405a4546b940c03b6d2b76328231. 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/TCAIX2400620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eedb8eefebc9c1a3be79736826cb3fbe7523dacfa507e59294151613023472. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZHN52587966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac26b32636579cbdb6ddacf9504a362084f98f9f805bbafaf476928fbce5fa0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:39:55Z), 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/QZK6K2524211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7ca9e9534383f45c32b64d38d9c7cf2bf6ede80a6849e9e853bc5673fb70a3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWQ2552570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9eef008686de56bf9af8c19922c07367750257a9585235b53ed7dd63f900ef. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:05:39Z), 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/QZTBB2580821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8215faf80296b6bed8078ec13466e5cb758ca63c701db7349f383b86ff895396. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFW2509276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8c24354299e75d1b9b3542006f3306cd7aede79f886220fd86c9afd0f83d29. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7Q2582495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd208268da3c7e3d9abe3d0c217ab77751618a113cc3689d332530332f0f682b9. 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/QT3FA2568132.