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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a6d6ac3c11e0076f08b231e0382efb870693753a7ad1b534c91c4af7416de2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2090846b-665a-4cfc-a607-4f3208402d40.json and https://artists.proofprofile.net/proofs/artist/2090846b-665a-4cfc-a607-4f3208402d40.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Falla: El Sombrero de Tres Picos - Turina: Sinfonía Sevillana (Mono Version)
Concierto de Aranjuez y otras obras para guitarra
Camarero: Vanishing Point, Duración invisible & A través del sonido de la lluvia (0013102KAI)
Falla / Estrella Morente / Orquesta Nacional / Josep Pons
Milestones of a Conductor Legend: Ataúlfo Argenta, Vol. 7
The Symphony Lounge, Vol. 15: The Magic of Zarzuela
Tonadillas - orchestrated by Rafael Ferrer / 1. La maja dolorosa: 2. Ay majo de mi vida
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9a6b57949671c48027a4eb2c421207735f428a53adf1aad7c62bb34ff964a1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEN961003510.
Bachianas brasileiras No. 5, W. 389: 1. Aria (Cantilena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba35ebe86fe0a7ba5d2fdcbec87ad2c855bf9209f98f2e12bf33ca3876c17a8a. 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/DEN961003560.
La canción del olvido: No. 2 Canción de Marinela
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1616cdc81eb181394b3c13ad34684193c03b9106ac62c2ef9e2340c332994bf1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEN961003580.
Canciones negras: canción de cuna para dormir a un negrito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57313c88bc6781e16ad4c079babc16fa04058c267f822b25e8f1bfc943aba66. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEN961003491.
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 0xd47743a51e3f8d716ec67a9759a56947dd5ed4e521c08b4579f7af845b799b4a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEN961003492.
La Tempranica: La tarántula é un bicho mú malo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591f70d0d460aa6f4266ed92cac4d7b20513fecc8b16c79fe8d16627a0b5da8a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEN961003550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052edc99ff8c4553595662fd658629d98d397ba2e9b5d85c1d5093af511580f5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEN961003540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbce48671c98153f18d8624b7f8e26e305360059c0af97411a2387d26fb4f80. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEN961003570.
Melodías de la Melancolía, Op. 119b: 1. A la mar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3587e43559552485ff1148e859b03db768b3ad21eab80b674346b6f4fed1677. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEN961003601.