Hassina Louadj (6 December 1957 – 15 November 1994), known mononymously as Zoulikha, was an Algerian singer of Chaoui music popular in the 1970s.Assia Djebar Ces voix qui m'assiègent: --en marge de ma
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 0xf007ddb745ef5a0a8fe820e68becdd12ab01bf3c545778926a370de39978f273. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b63ecb28-9da6-43f6-8e15-65f7b1b42129.json and https://artists.proofprofile.net/proofs/artist/b63ecb28-9da6-43f6-8e15-65f7b1b42129.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 0x188ccb342610aeaf72220ed28d2408ebc1ecd915d9c39d64179204df977b3a44. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/MAA172001062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bfcc959cce18e203daa69c8525c2698ad8834bc983b43101aca8d3d3b0e755. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/MAA172001065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56de3ec604bdbb84a1e62efccb416372a4f1e0f6f938a6746a01f3a0c1aa43ab. 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/MAA172000535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085087cea82fe20d71f194dde2b10659350743d9c6fe369bb3bd6165340e45a7. 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/MAA172000537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb81745386bfc02d25aa795dade5eec8928f5978be9b328e2f6ac69900e4bc5e. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:37:32Z), 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/MAA172000538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9333285a7e9b26a57fc7a84cfda78ab1d6af2f2e567f68b4390e9e95a72df336. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/MAA172000539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27531cce0e10a1a0bcfda3065789edfedb7e760f761c5b7a04a27b73448ca901. 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/MAA172000540.