Francisco Aguabella (October 10, 1925 – May 7, 2010) was an Afro-Cuban percussionist whose career spanned folk, jazz, and dance bands. He was a prolific session musician and recorded seven albums as
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 0x808c865c00df08fc04315b3e52b18c193b7c4ae5fdba32044e3499f1153c4cce. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48675c6f-59d4-4434-8c22-dbc21a1f3d7c.json and https://artists.proofprofile.net/proofs/artist/48675c6f-59d4-4434-8c22-dbc21a1f3d7c.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 0xbf2fc00b0bd911853652cd24da4754a1deed6c3c14cae5be57d7cfe69f4b601e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCP70301701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015bbf3f7e7878714016f0d95f4cdb60b545456993742e398e042078b89f23a1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USCP70301709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccafe38f720769ac6636574ff7eab086dcb99867f8b20e9ed8494095d747a26. 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/USCP70301802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deb9a6d2f2c6cd806cfc4297ff26b59d7bb38355fcb8513cf9e984b91913898. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCP70303808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21932bef16d4bcb5cb5b00a4ac37874f24a71d48edfff6d3ade18c1d9f394ca2. 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/USCP70303809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec20609a27ee8e97b79563e2dd77484059070db4ddf9f7a9f200bc022708c1e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USZZR0610169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0e3b129e1cb1e95dbc746c8a3259fce13c23bf78f5a4f74f8856d45c46da5f. 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/USZZR0610172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f876089ac63ff669de69749b5fe55b45114cac7b982f78360712080b583785. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMYHE1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99235999b98e99cbc95de077ae34340e15f0b6e16a647067d024fb190bbf64e1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US25T0523222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182da709e51a688c38462f74348239c5e7d0efebd0f7ba3f3289f29ebdc79b71. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US25T0523223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22d5e99ab06f9007147433a25b9491d0acbc0443236d553baf1d2cfad90f5aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US25T0523229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadf12ea95dc563c3639ae5d20eb64c207a5e76cda4eed2bd8aca1ac7ff9c94a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA71386441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddbbfe674eb438e994a73bae00d95e2d5cd599d8956d5485bc7f411dd155d71. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USZZR0610030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c434df094408ebda28bf1c950f0b524fb6a38b15106fdaec065606f414eb10. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMYHE1100010.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcfb813e8bbce47e469c753ccba75f3ee90663d8f75f45c8f43e48061e4b3af. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QMYHE1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51d19fec84ba6325808fe17d01854ceeb54f978a3d9ee09b043be1818ed761f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US25T0523224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9e08af0844f9a4cadf9f1b291c47ba0490b4ee0bb5174aa0836dec44fe555d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US25T0523230.