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 0x32b102a79094d6bb8b4e903622715d168b688a230cc04d93c2db3046986d67ff. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0b64623-5da7-4f49-96b6-5b402600d2c4.json and https://artists.proofprofile.net/proofs/artist/f0b64623-5da7-4f49-96b6-5b402600d2c4.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 0x09821325d382e061f7dc23785330ba46962efcf20742e1fb1827b4eb8b85ecff. 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/QZDA52115886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f0fd98a84101fa400ee154034bc6a7b6ecdfdbe248718c5f2abf7ed2e2ee22. 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/QZDA52115887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899c62012d1f28847b78bee2d7e51b869dd54050e9540fc473e50579940f4334. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZDA52115888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd7230c89a6222903c079a1987af1277e7963c67421a84195cd551609a2392e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZDA52115889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b6bd81e1696c3dca56b14a94f1391f071f62b0218d7ded8d655b3b6033a346. 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/QZDA52115890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e7838d85db98ee63006eb00d3f20c15d8f7dbfb22764bae96f68f4f2944944. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDA52115891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1148ff36b1762296a786c4c4e8dcd0804b5be38d3169da193f488cfd5d1c6bf8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA52115892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22328a3f60ee089db3b4e63275fa71e50701d5a3b43f7f31d3874c592662bfd. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZDA52115893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326e0a44c38d6c4f7ae4c891966ff74ee2e9053579d69086bdca7684d7d996ee. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZDA52115894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fcd357e8ed3b8f601a1c7d9048e3d44b38f2a261589c0fb472b943349c6758. 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/QZDA52115895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba8349e9794cd785668bd906c4c406c8ffe6b3ae785c642ea8c249962f64ad0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZDA52115896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c8ce2ccea2b03ccd8d1b81335d8db53034eec18fb185e29971e013881c5796. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZDA52115897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55148c98fc5fdb62d9088ef96c07ba8d73b668ec5277f45d22cbeb4fb91e4015. 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/QZDA82100913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37d1cd58f062990e52cfd101657c70958fdd46fdda9b0cc9bbf28a8215c7970. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZHNA2153181.
Secuelas - Solo Cadaver/ R2/ Catrin/ Reque / Beat X Ogre666 - SkateMaña
Hermandad - SkateMaña/ Catrin - R2 - PequeG
Snakes - Solo Cadaver x Catrin SkateMaña / Beat x Ogre666
Desde los Cerros (Catrin, R2, Gcode, Razko, G Chang) Beat X Crudos Ruidos)
Mas Guerra (Razko, Kore Slaum, Catrin & Seyer)
Nacidos del barrio - SkateMaña (Pichardini / Peke G/ Catrin & G Chang)
Quien controla (Catrin (R2 & Gcode) [RatsBeats])
Rumbo - SkateMaña (Catrin & R2 (klowi beats)
voces de media noche - sk8maña (R2 (Fat Point Beats)
Nadie nos para - SkateMaña (Catrin/Dalai & G.Hazt - Beat X Lalo Beats)
Welcome To My Life - (R2 & Catrin SkateMaña (Ft Gallo24)