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 0x2e30e5dba003efac35225e9e842619a49df5cca0fa19461269695b998d8c40ca. 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/4bca6167-9f03-455d-bbd4-7ebd385aa7ec.json and https://artists.proofprofile.net/proofs/artist/4bca6167-9f03-455d-bbd4-7ebd385aa7ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x9031c1866bc90253dc1bc6bca31362ba3dfd59dfe09b7121a476a94e7525ee02. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ES6490918305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad74034677cd28552a50d602f9bef5dbaf745fd907d3e0ece0f49c3639fa0e18. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES6490918307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa937f05af6b5c77bfcbe6047f31215a1db7c5e0dc8f8247c3d827354eb848a2e. 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/ES6491120703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cb929a8ca11de3707346e6d4287a5538c1816345e7305dc89f8844954c5d52. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/ES6491425406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb849da55079b2926aa87e0ea08f3b3e5b332645e535169455c1fad79c7bd32. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ES6491425409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f04a043003cde9b214f81ed2119f10acb06be9e5934c9f48c2cd79464c9f0bb. 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/ES6491527601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d73692aa2da75739cfaf7955c05f62d380cc3d3e9edb47bbc37302108e10eaf. 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/ES6492137302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2800315625f75d807d82cb81341a091b6333e346a4e462d0ebe571dddd844793. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES94E2410701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56afcba5a0d57b3acfccc8a71c7bb5beac0ca57223cdc581fe84912013764be4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES94E2410704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85545140336fa678a2820ed9650af80ce4c93f6f55e255aaec08e027b1f35d8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES6492437301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc07893ef294bba6c17b95310440866dc54fa3eea6a736e6a37bca348528acef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES11C1900965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b55e282928d7d48b8e41ec96cea287dbe6119b4d75a869ea081737114ae44d5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFME2015763.
Perversions: 15 Cançons d'Els Pets Interpretades per...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8884b7334a2de65ddbd6d532c3229e696d00765107bcc53e4e6e9872f233db8c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES80A1203303.
El Pop D'Antònia Font : Versions Halògenes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7a7dd34ae4295bafa0dcfc760f23dfbdaba02e2b0eaccee0269010c7545cb4. 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/ES5301150811.
Kitt y los Coches del Pasado - Sofía Cristo Remix
Kitt y los Coches del Pasado (Sofía Cristo Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffd1d4ab97fa9c0f4b6b501d7452c80b412f80327c5377431e73be262ccf527. 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/QZNJX2444884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8145376ff0f23803d9247980762b62ed1cce786522aebb3b8180f113421c4bab. 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/GX3Q92326902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd986568d76045dc57a1a6ec48a7219e364de507e83c0846646e7976f08728e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES5301354015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0421da9e16dd453beab364cb57437a37f875574621ce670be11665824fe1379. 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/ES6091601524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c264bb2067d56670d2502b53e438335ec68e58f023da7e6e896a47b6fe2df83. 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/ES6091601528.