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 0x8ad141f3bc341423a7d359bfbbf20ca777eac79575b5cd84d4f2eb34bc39bb2f. 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/cd2e8115-3e77-4c0b-bfcd-69357377b265.json and https://artists.proofprofile.net/proofs/artist/cd2e8115-3e77-4c0b-bfcd-69357377b265.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 0xf693673f64e7d34035e2e1b60bd7ad9f459b4f69dc43088a08cb665158b7f2a8. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/ARHXW2103098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cdf73b55ce1778bb9e63ab4d46d5d2394c3c482a54338e144ede54ca6ffdea. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/USANG1900294.
Cumbia Buena Live Session, Vol. 1 (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bd507c61a0fcc63e2692773face55ac38484a0fe0c626c349c9d05a188e518. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARHXW2104738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7809eb7f32429362bf037ed40e7c1cea6570a1b03bfa79ec635f58e8cfee44. 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/ARHXW2106080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2abae977d7d4a3fc7cdf4dec66aee8ff8a8c67f58a6b47ebc464b55c37064f. 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/ARHXW2201025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd18a69b840bf07d296b416b068e0ed1148828971cb99e4c9b39934f2a35f31. 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/ARHXW2201257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818bd5f6e986686be39edc04aa014b18d4a1b0f5880592118c0a3953f28dafd9. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ARHXW2202129.
Inexplicable / Los Brazos de Papa / Nada Mas
La Tierra Canta / Ven Espiritu Santo / Espiritu Santo (Cover)
La Tierra Canta / Ven Espiritu Santo / Espiritu Santo - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16db9ce4f4f9e068e199ce645766bfc512614c89505b332d6e5c55bcce5ba1fe. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:15:36Z), 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/QZNJX2364445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda09f88f17323349da406d8a775cd46d194e9fb4085e80fe09cd3865665fbed3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNJZ2300447.
Dany Ubran: Unción en el Aire, Mesías - Cumbiorship, Vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2c1c21d23c8cc22a11806fbe9dad2d896601d361020c02ffa83ea6e3092ef0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZEC2453887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aaadfea376f4266210df56d448400ec54e9aa09d79184d99fc48f5fb8d102b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ARG992044814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4c78310bb2f6ca9bfde8ac878fac08b537132c87e7079473c2db8f72cbb29d. 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/ARG992044852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c1ed22f8b934811dd0aa7d2c1c50d59b45a01ddd04ba39a6d7f74d4bb7af56. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ARG992044782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd747d64d8e910efb2af92611ab07007f5403da95a2bc8406ceccdb559d230bd7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTPX2551945.
Mix: Creo En Ti / Tus Cuerdas De Amor / Preciosa Sangre (Adoramos En Cumbia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2816e28091af31ebc8e30c0d4fb1aa335fd94da57f7133e26ba20206b3117969. 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/AR5UH2301147.