Rodolfo Ángel Florio (9 November 1929 – 5 October 1993), also known by the pseudonym Chocho, was an Argentine singer dedicated to the tango genre. He worked with various top-tier orchestras, including
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 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 0xe6d9ee067d0b104f0885d7995637af466be7a70cf786fc52932fc9d406f07902. 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/4d71773a-d37c-49e3-8c62-d78c5936a6a9.json and https://artists.proofprofile.net/proofs/artist/4d71773a-d37c-49e3-8c62-d78c5936a6a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zorzales de Antaño - Roberto Florio - Varias Orquestas - Destino De Flor
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 0xe778e55204555f14e7e7f8e66af4baf528e6ef006b721b5a1a03735d3c4f8a0a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM7282372507.
Zorzales de Antaño - Roberto Florio - Varias Orquestas - Buenos Aires
Zorzales de Antaño - Roberto Florio - Varias Orquestas - Por Una Muñeca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe895af2c04916f7168976eee318dd3c5d0e3d94ca1cf7ceec1842fc257bd1d11. 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/QM7282372288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf88e21d061d3ff9b23293b902c9d73ab027dee41cd75f82cebbe7439a2e8e23. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM7282372290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd70ff9341128891dc6e583514af91e78a81f8fc057881c23e062343bda47a92. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM7282372293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf449836769f5d82c3968a78f10446919cc1d9d8d2bcbcdf317e94d3e7d5384e4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM7282372295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dca443034889df8936b71d1311f2bd60a1041f7412c2191e679bb39ab29d10c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QM7282372297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22362a3c26ac501456bdba1a311aa397ee40ed5669117e93961ca7cc4ad70f4c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEN721204629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25353ef5fcdd8b25c6acdc1d09637960341b961ab55a0403a4adef67df33b18e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEN721204639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f1919c512369924b3ad681e8bcd90a816c7e658c32e00cd0f08c5f8040d9df. 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/DEN721204650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c53677c0e7b4c7d3490fc4b6a792ac61b5ef44e482859f50bffe5617f30d78. 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/DEN721204624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61557d7cc354c23f8c7e4bf79c68fe6b5838ccffdac5172fb3f43a5c3fc55be. 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/DEN721204642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e89b584484e40db54b18fe784027a32827721fc354a533d7ef85eb4e2cef70. 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/DEN721204631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a1f89af5d55f456180735ea734291ba9a7014739d96f8a3c091b48289480f9. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/DEN721204627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862bd6ade16b1dd3c59e7d8298566e8f430a8576adafd7d249c353f698b3dbf8. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEN721204634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489232a81cf02aa663699f8955996d2a38e5dc69bb12cbb7cdc11dfbd7b0ad8a. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEN721204645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4cc6ff46a409b4138f0c9b627aa8c2da2bc0e8493fa545f3c2772370f0e9a1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEN721204641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0635c9698204a0fcb2e940e6c6d639a6becdde366592dfeb21f7167316e85a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEN721204647.