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 0xe679b65636b36bf616dfa87d312aa59326e4ead7bc64cd5eacf51e5f96ae69f3. 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/8465a72d-ad9e-47e4-b9b2-dc5ae4135e38.json and https://artists.proofprofile.net/proofs/artist/8465a72d-ad9e-47e4-b9b2-dc5ae4135e38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sidi Mansour - Baba Bahri (Mr. Mansour - Father Bahri)
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 0xc3c7a9967cb5a26aaeb4ec8daa5c9749e8d71879bf34a47a8326276518ff1dc0. 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/GBCKG0600304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1204ae34516cd41062ad93890d3d031481889e055562c4e638b27195b48ab0b3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:58:44Z), 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/GBCKG0600305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c07a380448d36ee72dcc474481b193cd8e4372e514cefa5a3f2fff08ebb42c. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBCKG0600306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c103d6c1befd749f422cc06d9ad87795869ddd645017619cba89cdcd11b6a88. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBCKG0600307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8671f70066d6248654d0a9f01638bfa644edbf5ff3a8a4a03d7f7d1fb4209f91. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBCKG0600308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c7a9967cb5a26aaeb4ec8daa5c9749e8d71879bf34a47a8326276518ff1dc0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBCKG0600304.
Taht el Jasmina (Beneath the Jasmine Tree)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d42a06b48e38c5fb4b21da0f2e6b6b78b381a437c4ea7cae9da62c05fab2e9. 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/GBCKG0600310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41a7d2b61503a421a2a1e9ca8058e2b6da18485ac9f9bc55b7d82360482ea08. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBCKG0600313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c7a9967cb5a26aaeb4ec8daa5c9749e8d71879bf34a47a8326276518ff1dc0. 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/GBCKG0600304.