Liniers is a barrio (neighborhood) of Buenos Aires on the edge of the city, centered on Rivadavia Avenue. It is also an important train station and bus hub, connecting western Gran Buenos Aires with t
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 0xaaeebfc842b044e7636a9f175bbff946fb799d46925e51eec6820651c023d951. 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/c4cd9238-e00e-4dc1-9ba4-ce416643c08a.json and https://artists.proofprofile.net/proofs/artist/c4cd9238-e00e-4dc1-9ba4-ce416643c08a.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 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 0x2ad34d4992153ae7bc705b4ef1edf4c20e16d1ab57b0ef410f716d186d8b9ddd. 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/ARF102500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad34d4992153ae7bc705b4ef1edf4c20e16d1ab57b0ef410f716d186d8b9ddd. 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/ARF102500054.
Diálogo: El Más Humilde (Vivo en Madrid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d689d985d35d081c6f565fb3dcc24ffc316f64573571d86c6184c7988ed0082. 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/ARF102500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798f498de504d16eaefa899ce8450ae226bc079fd9ca432e032a327153677fda. 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/ARF102500090.
Diálogo: Inteligencia Emocional (Vivo en Madrid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0c7c351b9521959b89ba1620b9633a9f538c4d0e1dc5609b1ccb335e9024fd. 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/ARF102500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250c3924e958a2a43dc9df59c1f378bfec59e1cdfdeacb7793b643ba684c796f. 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/ARF102500072.
Diálogo: Qué Diría El Che (Vivo en Madrid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08f31193134f647d3fa6f8787b1b378a81419091d2d298937b92636cdb0195e. 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/ARF102500092.
Mc Guevara's o Che Donald's (Vivo en Madrid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445d5745e222349c6c15b3d1fe6ac902bae5245f9709f16fa4fa3e804c6beaf1. 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/ARF102500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b4ea2a838fca0a88689d13015c41044821623e89b43fc646f2d5a0f73a3949. 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/ARF102500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f4abe552646491e1b40eb2736683e87730fd1a77a2372c16ea97a8e7c84b74. 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/ARF102500073.
Diálogo: Técnica de Corea del Medio (Vivo en Madrid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde814ff0a02e5afad64835d918b48dc3f73e954de74944c55206ae7d6e75c959. 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/ARF102500095.
Diálogo: Intro Jorge Drexler (Vivo en Madrid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd926beece54966a7b5294c6d96c4a20cef8ea8086b71a54f274f625c732d40e. 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/ARF102500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51964179fe59250e4b6ffb2bba6e97998d9f5812898ca93938eb9c9363d37b41. 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/ARF102500075.
Diálogo: Recital Tántrico (Vivo en Madrid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8837971c11da356bacbf0885b5b9c23fcd0c16cfa9700fb9f4503e38d1e1f0d. 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/ARF102500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f87ce316ab7ebd8ab9c0776aec6d2a612fdf65fbc5aab7c7185e6b207affe1e. 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/ARF102500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3545788ef11c8cae6d3e5488b7c86aed9330f8bd84093b0a11e18d12df8358d. 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/ARF102500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aecd0691c6280d14289e642cb817e80c7b0998d4bc0705ce5dc7f5160780b9b. 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/ARF102500100.
Diálogo: Intro Las Migas (Vivo en Madrid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59655ee0e309607452d49b5ca5b3050c217fa5e669f7122664203bf4126ccda6. 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/ARF102500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc706c3ad301f4670bbe969a98e663d06d3e1cd6e41e55df1167a466948a06167. 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/ARF102500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe361f1edf3e33ed028ee1c917e8a461adfcd61f582ea4596062fe410b367d162. 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/ARF102500077.