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 0xcb2036a7b595144df2600e1ce1835ffa472f72f4ce743e9c99563c58ecbf984f. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a9db32f-e2ea-4519-ade5-f4972d66b84f.json and https://artists.proofprofile.net/proofs/artist/0a9db32f-e2ea-4519-ade5-f4972d66b84f.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 0x6d702946ebf4fada5b0caf90fc489e5f3122084587a1a7ce6b9453d21f79f393. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZASYN2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef5f34022948bc26b96fdbf315717eb5a9ab7cae633058130cfceb1e48edaa5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZASYN2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65bf5befcdd8b7728beb1f12d59606301ad4bd1596861a89c6d182429b342d1. 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/ZASYN2300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c999991f6f763d3725085dd7fa38ccb534c0f3889f6182ac797eabeca2c856. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZASYN2300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd296d2e7ae26e85a8004b032cee6d32468b23a6701a1c8f1d2a26f152e27f1d9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZASYN2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca33d7b1c0df7a50654506f251335e3fe0fe66c6b4b487a53097408a7cdb6063. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZASYN2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fadfcd803c99c3b9455223a197a7c56386c92acf6807c98c80ab97acde4912a. 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/ZASYN2300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c25ec310c70ea91eb69ecebc55acf50702cf2ba2602cefad10694b24a1b72b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZASYN2300089.
Iskhathi SamaBonus (feat. Ntando Yamahlubi, Mdakzin & Thatohatsi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd470b4aa8221bdab25c38b5dbf9b06898a87729d487dbfac2e3002ab764fd9b2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZA56E2416821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5702e29d36f977d9a6406d34f3f9973db594f707de61979284ad6382e3bb7619. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZASYN2300077.