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 0x77fcf841237c3526617049581676d3a679cd0ce9acfa26843d2eda31b8b6e67e. 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/dea2ebaf-cb6d-4f81-8edb-6326b56a5ece.json and https://artists.proofprofile.net/proofs/artist/dea2ebaf-cb6d-4f81-8edb-6326b56a5ece.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Had Echira Nebghiha (Coke Studio Algérie)
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 0x0d73812413a352c4dbbaf70ec216d0eb82e857b7803b5df21c2054b1d62194a9. 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/GBLFP1975971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85052a438cfc6017d4fd7ba6f91835875d1084f174b8646fa9824082005b5c27. 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/CH6542106352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ee0f19140f54f11b3af40ccae2ded3260a8e653fcd648033978067180b27d5. 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/CH6542187369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7692cc2993baae500f5a35424eb745a1baf72c7a31ac7e22cb1e6f67fb24d08. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/CH6542335535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab013e4b5519d94dac4171ed2296715f89a694e024c043a12d97c136b1c3423. 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/CH6542345318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32612c51ecf1d6ed128c3d21148e9152c0b434c8d04126da9b8550ada6013bd9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CH6542441104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe901c42cbfcf3925cb3bea8994f1bdc7a705f039c2f5416db94090f3a1b85f5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/CH6542444413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718f13a8af688ba0cb0a0e2ec32728d699745664ab765bc2e0edf609ae9a3851. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CH6542456373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce43876359976cf220fd2458afef31f82592df79801d22f20905ec921f6a79a5. 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/CH6542467114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb3dd03f23cd4937009d4219bdb9995828340f206945a7aadd7f934f572ae1e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZZ762484391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2792b9a0453fc447a8182a7e767697d78a21961e9b6327963046ba9f097c6c74. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE3OH1727416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f09ec053472e63f08849691743a9309f11baf2bf458ed09fface27e2ba9a85. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W11711103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d97de0be3daf34e925d5ae36506ebaac684a6bd632082bdf07b8750ac50745. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR8GV2425120.