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 0xc1bbbd7856a438168cc1a3af616367857c00a84c089aa7c0a2f8580dcf84dc7d. 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/04a8c010-5986-4771-a2f8-f808239b92ed.json and https://artists.proofprofile.net/proofs/artist/04a8c010-5986-4771-a2f8-f808239b92ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Embajadores Del Tango (Grabado En Vivo En Alemania)
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 0xf842f6b1398363e9d2114fc247626e741ac7b00965085d7559b52fb541fc09e7. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:16:50Z), 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/ARF049501009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1707bdaf9204f9197f77e871269cf7be5a41044f2d34e4a61189401174f55678. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/ARF049501021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7674e83846160690446ac09653e6647f935a2d827c383b9aa23f660de025b24f. 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/DEE970603006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a08005fa33f72aeb3df407c5698cfb391887abaf258b8850f0c06cdea425de4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEE970603008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001a852c71044baba2def13512fca267288d3102c8fa148550a09a6f6375e7fe. 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/DEE970603010.
Sexteto Mayor - Members Of The Tango Passion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5963ad54bf267f540524bb7c86ab0dbddb2a2f60e28b7db5c1208a4603a7f253. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEU241120002.
Sexteto Mayor: Trottoirs de Buenos Aires
En Vivo En El Teatro Muncipal De Bahía Blanca (Remastered 2025)
Canción Desesperada (feat. Sexteto Mayor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7080e6b4a3170a39b60f91a4f26c2950ab01fd755ac632ef3aece241c85d9a0. 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/ARG601011874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc748d57230a10325328fcd2b645b1b92de2c22e4232aa1b9f8b12e7d5a502b2d. 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/ARG601011880.