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 0xb450bba8f313e934bb2c95509d0e97f86829c7439efe2526724df0a29c2126d1. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6e36e95-f56e-4e55-b4c7-319d72022f18.json and https://artists.proofprofile.net/proofs/artist/a6e36e95-f56e-4e55-b4c7-319d72022f18.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Leyenda del Tiempo (Loop LIVE Session)
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 0x1a939410e37483ef17f9084cca30ed3d9ab96f603a65f24906930696a0e9923e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:44Z), 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/ES71G2109377.
La Leyenda del Tiempo - Loop Live Session
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf66ce40061e836272095bbafbf4b0239d411ec44c662ee32cb512fb3cd3f772. 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/ES71G2057562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33bc51419d375666a28976f187239ff980cd51894ae332942d68c5b0fb4304a. 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/ES71G2146197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33bc51419d375666a28976f187239ff980cd51894ae332942d68c5b0fb4304a. 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/ES71G2146197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8234ffa5d9f555d8a0645e167237d09fe9a1b7385fda2da51cc1f9051e45e2b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJW2326341.
Hotel California/La Tarara - Mashup (Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6ca7ac9265bc221f6ca7a5ff4954af3900bf83a99724ed2633a373a58db444. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:50:36Z), 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/ES64E2400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08b0a404240d1366438cdc8958052af27d9eb655450f00eebeb3ef7a6de0bc7. 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/ES64E2501120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19900806a76f7eae8e50a0bfc98311c9a95f5e973bd55d452f79f29b1f7d04a. 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/ES17D2201755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8f0e75da8ad1ebdb5844ea46781c7f1ee49358cbf022a529d94c10465e047e. 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/ES71G2429157.