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 0x58ea8ec0661bfe2dcfa9b570a58f9f49a8449232548308c4c1edd103026ebcc2. 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/50f16867-44bf-4973-8e6c-20dacd708851.json and https://artists.proofprofile.net/proofs/artist/50f16867-44bf-4973-8e6c-20dacd708851.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Shosholoza / The Kwela Song / The Lion Sleeps Tonight
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 0x262851becfb409d5f4057e4de98dd961c07f11f489724465e4fb3ba65dd574ee. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBBEX0801481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029b9bacf5db9faaadae25a021210220e5e25a482f0d7dc50f82723389dc3033. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GBBEX0801484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61faea062e115cc22b8dd623ad9a8fe2b78b85348a8d04353ad624eb4c5d4b5. 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/GBBEX0801489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eef06d4b9cb24b62c47ac8bc97572fc6a2198d76903de676dbf203d99ae1614. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GBBEX0801490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa614bd3b84e8a100d8718ad53b2978ca827f9a4d5c7ff2d875b488d637df7c1f. 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/GBBEX0801491.
Jig Set / Flee the Glen / The Panda / Glasgow City Police
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a079929a02a9255460a464f557b65a0ba7a96f09eb29520920bfbbd20eb864b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/GBBEX0801495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965bdaaec1072344793f3cd9dc56d6d98a3de9057060fe45f87b43ef5866acb0. 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/GBBEX0801498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd55a26cd1a69acf1ca95ce1d33e53808e7b6dfa3db540165eadbd2b7d7e8468. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/GBBEX0801504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998f275d1daad081f7fc50e273418185a52d57174aec6a010ac76bf2a721d76c. 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/GBBEX0801506.
Regimental Band Of The Gordon Highlanders
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52051889bbc039521fa35f76342097c667d8bb0e01e1a8925ac960710c6dc27. 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/SEWDL0644011.