thumb|Vasquez in 2011 Matthew Logan Vasquez is best known as the lead singer/songwriter/guitarist of indie rock group Delta Spirit. He is also a member of indie supergroup Middle Brother. He has relea
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 0xd18b75a2dfe6906b0e3f9a240ebb7368f02bb912b6cf79e52840659e46da9eda. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b47e394a-4a63-4bfc-b9f8-d8d7573e166f.json and https://artists.proofprofile.net/proofs/artist/b47e394a-4a63-4bfc-b9f8-d8d7573e166f.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 0x3a70fdd81f3cd986095a42b09c162dcad3f99106973d2e359d28903efe5fd7ff. 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/TCACI1558791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5e62181c86f4cbe1d35893bb75fb3724105fb54bee5ab34382709a4b17478b. 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/TCACI1558793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0a56c46a5e3a23c17d7b63c98924782156f08c67fbe0c06b7d5980ab6ba2e1. 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/CADE71800778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aee3caffaad37846571cae7e5876bbd9092b9bb30bf5151cb05b1cfac568af. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:33:15Z), 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/USF2M2301065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249a1d60e30fdf7dc7ef4e5429d841f783cefe1faeba2d730296e177df2bbe3c. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/TCAHK2312195.
Bushwick Blues - Frank's Full Moon Saloon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597e891331aa1da62c0845efd934e2b9f1aeac60edcb5d8b905b5f164fa134c7. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:09:34Z), 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/TCAHK2312227.
Frank's Full Moon Saloon, Pt. 2 (Side A)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2107e825acecaa707b33dfd17cd28e81fbfa6cc0c9347ef70229097359f1ab. 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/TCAIJ2401377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf497250755b464e3e0d3823261b9c9b28ddfb14963f3381ad5eafd328782d942. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAIK2414061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ceddcd6c84c2ed3f69b062ad80d338a5787e3c4535f61c0724de6c7e4b7b369. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAIJ2414079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9772ee2b7062f12cb3ff13afd0535ba17a6a34f5dd8013d140443050eb6c16. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAIJ2414098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2107e825acecaa707b33dfd17cd28e81fbfa6cc0c9347ef70229097359f1ab. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:45:46Z), 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/TCAIJ2401377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e9e31d72ca5b558c417bc27c6dabf26d6bc2524283f54881f82810a58ecbc4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIJ2401408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47398a0e27d420aac3fd2795e4cb3ccac5858939fb5c3ad77450692ec4bc20ac. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:21:23Z), 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/TCAIK2401451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf497250755b464e3e0d3823261b9c9b28ddfb14963f3381ad5eafd328782d942. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAIK2414061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ceddcd6c84c2ed3f69b062ad80d338a5787e3c4535f61c0724de6c7e4b7b369. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAIJ2414079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9772ee2b7062f12cb3ff13afd0535ba17a6a34f5dd8013d140443050eb6c16. 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/TCAIJ2414098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf69022638177f56df4dc8b187e7e855e996411f3ab2d9479cc4a288f6ea31ee. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:26:46Z), 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/TCAIJ2414119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfb71f35faff79aa0aeb977dcb30c2e912a8cf6178dda4fb6286c19d051f4df. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAIJ2414144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102c77ad69206c2e77c44e8cbbd112dda8af30ba5e3770ad685301b18db062e8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIJ2414155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6f55e459b1412f155cb44158fa63f5b430bf5644fed35d2e75561fe9766639. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:50:42Z), 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/TCAIK2414165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9878fb78e35b7c5fbfa656221087ece7636f8b2d84144725bb877939b469e576. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAIJ2414167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c555dd4357acab7fca63fa1377007581a81c54578071f8cf170eb704b26c61b. 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/TCAIJ2414230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0de63099000341ee0a49f42571517e7a6b92ccf323d1ff94f0624e72172093. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US27Q2116901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34405f839b3fc6c376e94e9398b782cfe44743f822d9c78f326073f98454ebaa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US27Q1741505.