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 0x55c09a64a8afe176417b738699933342009bbe87e6757dfd6579d4911a13ce45. 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/e0c28ceb-f2f7-44ed-a42a-d75111b72ff6.json and https://artists.proofprofile.net/proofs/artist/e0c28ceb-f2f7-44ed-a42a-d75111b72ff6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Historia de un Amor (with Rodolfo Lesica)
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 0x1b4deb123062026b9e1bbd7ce40164e96b6f5338379e193b7ab1b8850f7ea150. 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/ARF109700674.
Del Salón en el Ángulo Oscuro (with Fernando Soler)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a81580bf451fecf6fbd0ac3f9c33786e58cba10013c25029362f12f72ffb0bd. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:26:50Z), 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/ARF109901902.
En un Sueño Te Perdí (with Jorge Falcón)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a925eb648a2bc4eef9b49f2bcc6b8dd0fb7a7cafc387072fda277d8ff89f4fe. 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/ARF100300273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4deb123062026b9e1bbd7ce40164e96b6f5338379e193b7ab1b8850f7ea150. 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/ARF109700674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d29a9c0373acd938bfdcb50d5f5198e3f0b8b543daa9bb7b40f5cf37ee45560. 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/ARF100600058.
Pa' Que Te Oigan Bandoneón - '56 Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38b4f49606f624785c33ff399ef8588d7aaeeaad3119e690d0775e24568f392. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/ARF101000236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeff2733a779ece59072191bc45568d05a61fc8537f6b74c01e55cb2d0888a81. 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/ARF100500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3695346334617936b9c2d037898364b4f99241207cb930e384cf4686b519600e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARF100500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4deb123062026b9e1bbd7ce40164e96b6f5338379e193b7ab1b8850f7ea150. 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/ARF109700674.
Héctor Varela El As Del Tango y su Orquesta Típica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fadacbb2f046ed29eb243ca2a5ec2d5ed9592e5ec1df7116f3ca8d70affe72. 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/ARF100500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3452443d85e19a1fc9f10e70f34d7347e4518a2436d4a680947670fe1e378eb7. 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/USA371135849.
Vintage Tango No. 55 - EP: Tango Arrabalero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3452443d85e19a1fc9f10e70f34d7347e4518a2436d4a680947670fe1e378eb7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA371135849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33875474ec701a57f09bf612ec7c671e2b1ebc00df47cb466411dd0dd351a47c. 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/ARG991048431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dca8670f1ebcc3fff98edddcc00ac767c6d975fff6538e1b609a142f388ca5b. 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/ARG991048439.
Vintage Tango Nº2 - EPs Collectors "Dancing Tango"
Nuestros 30 Mejores Tangos Instrumentales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dd4c5a87417ead6a40020335a4d2b0ea10eec46a3ee5c7d8e1a986ee971c7f. 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/ARF109700652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12529e929e4312af6e902593d8f58eee83b2db5287c0454a9d73fccd1150693. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARF100100235.