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 0xcfdd5f492b1585ac1bdc6e310ee3bff108384d508e69e9288a8f11222f86a7e6. 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/df970de7-fa65-4024-9a50-5dc9f4253338.json and https://artists.proofprofile.net/proofs/artist/df970de7-fa65-4024-9a50-5dc9f4253338.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fútbol + Música + Ciudad (Los De Arriba - León)
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 0xbc045b1262ff4f0f8dab6299b42498d80de82d041ff6fb11699a8aee04602191. 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/QZES81933465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e44debf4d88d782f4cff6d31169f8cf2f9972939b9ab9bf15a59961650c89b. 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/QZES81933466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262b07e978bf2727596081fe7a77035dbbdc244cf661f4a9a702977b7351c43d. 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/QZES81933467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca8b82e286774f29d2931a3568549c85db92f0726a3e4cf3aa928333aa733eb. 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/QZES81933471.
De León para Milwaukee con Sonido Pirata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5946aa12be06238d8a58fa2837c01cf28d4090e1e8d2cdb6e7597547a57fb3. 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/QZPLR2028212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70d32802121681fcc6f840ea5c8ab955ea05c8021ec39a6025a9612134dd69c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZPLR2028214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01c34c6948421a43a40f182c744fa195026e6001997d189f2b275b69abcff68. 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/QZPLR2028221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a89e6234d4a90b95a50b672565b16307e0d307942bdeb347eb57bfa6e10b1a9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZPLR2028230.
20 años LDA (Sonido Ritmo Colombiano & Sonido Pirata)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d42692dceaa2bd2784994672f5c7240fc8754be5691360932e8033cc0f4fd4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZNWY2253129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd983d78521c4596b5a1b6da0fee72ac4fee21f7b1fd63919ce0b370d042228ba. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNWY2253136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe717a3483fe4c386de200e7aa5d31bf68e538ab69dbb821e45153d64d60c7bf0. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNWY2253139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795b3782fa2fdc691267e3bccd4f92a7ae183be7322a372dd4037015af48639c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNWY2253140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2816dc5c8a9b4f15814db5b21f2d4c1d43ce56b6e05a38c6ef73ceb62d613114. 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/QZNWY2253145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf34f9022c439b4fec3c47285b783af6daaa55a18dbe67c08c11c17066d0be89. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZRP52403833.
Guerreros Cánticos 2025 (en vivo desde el Domo de la Feria) [En vivo]