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 0xf1efdc39db8c90e4c9626c1a0147e143ac15671ddae13118a3cd82158ca14092. 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/ded61f47-5dcb-41f7-9d9b-8423f745a1ba.json and https://artists.proofprofile.net/proofs/artist/ded61f47-5dcb-41f7-9d9b-8423f745a1ba.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 0xa9bde83de51f9056a36118395085b1f625fa40584d57af720e6f110817953fe8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMBZ91609717.
El Sabor de la Cumbia Mexicana 100% Sonidera (Vamos a Bailar!)
El Llanto de los Luceros / El Llanto de los Sapos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f285c772d1f50e9690a7ea8904d047bc2d948dbae8163c2310ba1e0e85fcfef. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZMEQ2125747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70844e94da77779d56b98a4a7168938606e63c67e0721e16e3b6a2b5c54d628. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZMEQ2125751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd14276b82fe03944ac9370a4b2975676776a668c244f7ef34853570c2f57a25. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZMEQ2125755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81da034626d09f5a61321a7bf991dc55668a720c28d33cf0af7a0fff19cea5fc. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QM6DC1716158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81da034626d09f5a61321a7bf991dc55668a720c28d33cf0af7a0fff19cea5fc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM6DC1716158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6617eab265a54c4c0719c2d7c0a59edfad0c0fabe6c1575180c1442db88ed2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6MZ1829613.
Reventón Titánico Presenta a Grupo Mijez
Cumbia de los Clarinetes - Cumbia Sampuesana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de3797e7389d2b0bacbd3bb4eb9842c80a8f0eef7fbeddc8dd334e3087f84af. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFME2077476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd318a7d229c585ff309d193d7be13be4715d73e7b6d3bb0267485089854e02dc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QMFME2077753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8a89fa6608fdeb9967f6fbee8bfa6f185501da2f7808a726bd61628d7a0445. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMFME2077761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310eea8f6d8f9b2347030cae0c5eb27ec67491a57dfbb944068ef15884b01c73. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QM4TW2167589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefbbb92bf30dd5a62fc7d24fb699b392b55b97cabde2743ea0ffd10ae0042b1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZXYG2402376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d3ddc7b247352c7d55619e6ebc4ff5d7d5ea2e28e2737c0e1409930291abe5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFYY2537436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6f6984d4ad68f7acc082ea7fca564f99af98f021a8eb26d98ddb0641070c3d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZMEM2551709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce3e128592385eafa5c7a8618bd900fc41c6ac3ac3b5b08dfb85e8dfcb0e709. 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/QZTAW2516366.