thumb|Louis Jacoby Louis Jacoby (7 June 1828 – 1918) was a German Jewish engraver. Born in Havelberg, Brandenburg, Germany; pupil of the engraver Mandel of Berlin, in which city he settled. Life Th
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 0xfd3bf51b8f8994dccb4d622598fc8daf6c4e9da187a49744040b316712f3c0a9. 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/3a93ee20-e67d-4e33-a78a-a5e43003ae16.json and https://artists.proofprofile.net/proofs/artist/3a93ee20-e67d-4e33-a78a-a5e43003ae16.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 0xda13226fb29fedacc5c66af94afefc7886d8a21da9ab80c99031335eb6aafb6f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:47:20Z), 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/NOACP9603080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92ff9e8ef23ae4987283d63e0cf97ac38155d90706f1c5304c61474d2db116d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NOACP9603100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63225bab91f97025a834baaa641e17dc297563a5ac0a26b9c07f4195d170db8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NOACP9603160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182a782ce9f275d340ceaa9bbe5790c6abd4426e6e04f521cb3c17e7256b09e3. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NOMOF0801030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbec659337609293dd8f4b98651a1bd8c899b04fd7fd5454cf69b15265915020. 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/NOMOF0801040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d5ef338f9a80498a8f596e5648209551b05384e659893ee502d810a271b96f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:05:52Z), 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/NOMOF0801140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bf58af105a0925b17ac9a85209fb1a52a2f364389e6d5c0e026e908db6a6f0. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/NOMOF1301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043905c3433af183dbf43afa5e1dd6b23093c443bf1db488bf3fbb4d3d4b1cb6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NOMOF1301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce849190dbc30f8259fc322fda519871a770610fd1c95bc74f62cd054017a61. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/NOMOF1301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714c63ba1b8ec2a524c28612e7270d44347ff4d3cf03760eab490f01dec70081. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NOMOF1801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17ec7706901c64a8977f24c0b46bae886e797d29c950c80642ae40f714c1c21. 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/NOACP9603010.