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 0xb18c59b0a4d1195c9601afa019c4214825b39659ca248c2c419b6dea1c897870. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d06d270-98f5-48f7-b82e-da224f0cd848.json and https://artists.proofprofile.net/proofs/artist/3d06d270-98f5-48f7-b82e-da224f0cd848.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Feliz Navidad (Los Mejores Villancicos de Nuestra Tradición)
Compositores madrileños I: Olavide – Marco – Aracil.
Sorozábal: La tabernera del puerto, Act II No. 9, Romanza: No puede ser!
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 0xd99fd485ae064f3724a7ca5242b5ea9ac38250ce8fa3c7f074ac4d8a2f15252e. 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/GBAYC0601962.
Concierto de Aranjuez for Guitar and Orchestra: 1. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f0f74176e2e8af047daf4c4a1a7179de4b06d3011e2372b07b9592b6856722. 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/ES5701900602.
Concierto de Aranjuez for Guitar and Orchestra: 2. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b7d740f20e85d428850cfd629d6fdef7c57b50691a8202d8eb56ed0f7a424f. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ES5701900603.
Concierto de Aranjuez for Guitar and Orchestra: 3. Allegro gentile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c43c4b75ad4b72fb1ff36a451d27c127f5d1884536c8beb5a683ef52999b82e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/ES5701900604.
Cuatro Tangos: 3. Oblivion - arr. for two Guitars and Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57552b36dfee704805433b6dafb8ebdc46bc7d21e2ff7ea278d56e527750034d. 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/ES5701900607.
Fuga y misterio: Fuga Y Misterio - arr. for two Guitars and Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0713860a4ddab843b6c044d547c61a8506d5f5e864e298e6fda522333df3575b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES5701900606.
Agua E Vinho - arr. for two Guitars and Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9902827bf707240c591a2d804c1f719b00503a8e31116e0d670a25f98dbf89a3. 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/ES5701900605.