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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5d810b9d5b4af9fbd082eae102d8a0fcf219e3a66f120560d571fe005769ca. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f57b4583-4ef4-4fe0-97e6-56c62bb8d7b0.json and https://artists.proofprofile.net/proofs/artist/f57b4583-4ef4-4fe0-97e6-56c62bb8d7b0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251c0e5950f42cb9aafc3f9d5bb8b457dd2fef98b9974939c3a2a1d7623208ae. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/DEUE12392413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492e6b8298941a7d9773c97c02806b7658e37ce76dcbed42fb863c6fcd53539b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:16:46Z), 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/DEUE12392414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea94b0cb93e8f31a2bcef4230f09f40b61857fe7dd2b736a1828b59e0c9578ac. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:14Z), 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/DEUE12392415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06291d171c2e4a05257ee1d5c44129e42c348dc31171a335eca82531587ad1fb. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DEUE12392416.
Vintage Spanish Song Nº45 - EPs Collectors "Las Leandras" (Estreno)
La Gran Estrella De Madrid Vol. 2 (1940-1954)
Celia Gámez Sus Últimas Grabaciones: 30 Grandes Éxitos
Celia Gámez, Vol. 2 (1929-1930 Remastered)
Celia Gámez, Vol. 1 (1927-1929 Remastered)
Celia Gámez, Vol. 4: Todas Sus Grabaciones
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0e3d6c0207c661857d902a914084c30236064f75b8f875db9d8181c60123e7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:02:15Z), 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/USA370954650.
Celia Gámez. Todas Sus Grabaciones Vol.4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf0276993a5781b3868765d3f547c6da9e9c5785513785b7e16a27c00d167fe. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES5080500534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212737adb3f6ecb6a710c1ae7c0327d14ef7d074c752d4a12fbe4f54aa4f0ec2. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:55Z), 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/ES5080500535.
Ya Hemos Pasao (Canción Schotis) - Remastered
40 Grandes Éxitos de los 40 y 50, Vol. 3 (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7739510557bf5652de987c068d0ba9e949a911e409d93d881ea3453556f79c09. 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/ES5330306002.