The Greencards are an American progressive bluegrass band that formed in 2003 in Austin, Texas, and relocated in 2005 to Nashville, Tennessee. The band was founded by Englishman Eamon McLoughlin and A
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 0x5806594fcc9b8aa63cf738317a34143c18a7b22d3449111b9eaa79a3ee3b3eef. 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/257bfc3c-6458-4d00-a262-4e5224db1a43.json and https://artists.proofprofile.net/proofs/artist/257bfc3c-6458-4d00-a262-4e5224db1a43.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 0xf5e0d8e53fb138996c9ba4f31a232dffb40593dad5ee278925e6fb9b94e48669. 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/USDMG0520302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe714b0f7851fb751eea9936d01d7efa6a08e39c7a4ea5e09f06380ef9b238a40. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USDMG0520303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9873bdfaa547c5f65e940c20d2a20119d090238ec3e2009394ee51337222fb. 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/USDMG0520305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e632dc97a2d5db053442d1ff498cbcefacf6ccf57824912c4b638bbea69b0c. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:51:42Z), 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/USDMG0520307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7838e3689acae0a051ab49b4a2cc3a6e79505d770496675ff466e3bba921e8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:06:32Z), 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/USDMG0520312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42525f986e38b050c5291fa800713e10acfe54f3a0b6bbb4f206f8dca446b81a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:04:02Z), 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/QMY8D1100001.