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 0x6d3ec3e140ae96540b421b468fe7f027dd6e509eed2ea6cc109fdf86fa3298d5. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/536d1f7d-5448-441b-8198-8d64731caf88.json and https://artists.proofprofile.net/proofs/artist/536d1f7d-5448-441b-8198-8d64731caf88.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Como Esa Feria Ninguna / Sevilla Tuvo una Niña / Sevilla de Antes / Sevilla es Impresionante
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 0xbb4dfc7ff4788dd17453655fb8fd201494498bae4edee63557352cc5671cea8f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:12Z), 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/ES5350702635.
Sevillanas Cofradieras / En la Puerta de Correos / Una Vieja Leyenda / Paseando por Sevilla / Por Sevillanas / Que Me Busquen en Sevilla / Queriendo a Sevilla / Lejos de Sevilla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437034613c70902164967fcedcaf7049b8982446218510294981e3f020733248. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES5350702638.
Ya Huele a Feria. Las Mejores Sevillanas para Bailar
Debajo de la Portada / Le Cuento al Rio / Revuelos de Feria / Amoríos de Feria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdba5380c6322b94cd7150e460f417c6cf19423437b3a9f11602ca6b57b7099. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ES5350702584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f885ea43cdc2dab13d61d8d22198e30d7a1cb49317378e2f09a467478ea030. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES5351202887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b56ffd23bce167ad8af5cc3b112fbc9a5fbb1683826043a289364e4033fe014. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES04D1600292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72c6a600baa71ed9175b44c24a9b601b910730870ce8c1315a97d014ade8b7d. 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/ES04D1600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2aee49ba4eae99788dfaf00b99514ef6b430d970876e146b7501eedd7f82cd7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES5351002762.
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 0x3b84de608eaa2c7003edb5e849984cc15672457134c5d51909b680ac3fa90404. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES5359701061.