Banda de los Hermanos Cortez de Quetzaltenango
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 0x4011f680c20fb7359d72d3f54c3b973dd09b16bfdde33ed8c1c61f287d02f505. 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/2341bd8b-918f-4f98-9071-b0dfc0315e41.json and https://artists.proofprofile.net/proofs/artist/2341bd8b-918f-4f98-9071-b0dfc0315e41.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concierto de Marchas Fúnebres de la Banda de los Cortéz
Concierto de Marchas Fúnebres en la Catedral de Quetzaltenango 2019
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 0x06a27d43c056212802971f59e5bd0675c0436cc5457767b88d8b5ca1457a3f39. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHZ32162644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebf72300ca04215632c9b2f73055d41853c8d084294795411056d903721562d. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T03:24:24Z), 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/QZHZ32162645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc04585769cf9c3826f30ef5b76af5d5cb6f57b1b78284f1b89417843ca4fa2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHZ32162646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823fa1b480d6d28e865d67a187d45db1edad54b5994f155be63cfcda1a95092c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHZ32162647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c41465e99325922e834ead29336d2db30afbe9acf12505a796a6337752c783. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHZ32162648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4e71f42d7cb9b5c6680ef3ac3119ed7ae47e806afaf63d5564935bf1244189. 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/QZHZ32162649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cca7d3a61abcbaadf571cedac390a9795b6d121f3e0ea94a1d496650d107377. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHZ32162650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8131074998990004a9b3c7e87575735e9bfc3bdaf162fc9c4cbd3a1c7c43c0f4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHZ32162652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef536434166f8334ae260cba670389f6599c0ef68807fc4ffd20f8c42771ab4. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZHZ32162656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8019901c374ac724980294c741ed821ff46feab6b9afd4433d28b65623e8c85f. 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/QZHZ32162659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9b05b42f3cc00ede89eac8fbe30ab79d721d7430467f5dd023a306c0162d9a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHZ32162660.
Concierto de Marchas Fúnebres en la Catedral de Quetzaltenango 2020