The name , derived from Jacob, is believed to have originated in the northwest Brittany region of France in the Middle Ages, and occurs in variations, such as , as both a given name and a surname. O
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 0x7c920f869f4df9d2fd4cae47b1be74342e2019bdc74ba4ccab37ded6819bea37. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb969610-3dcb-4bf1-9e08-772861a798eb.json and https://artists.proofprofile.net/proofs/artist/eb969610-3dcb-4bf1-9e08-772861a798eb.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 0x4c7dd7f1eb99137eaeb0191f35ea48da8f5be8910b9822a986c53798921a2977. 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/QZHN82210602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6d6433e26fb872a261a955bae883f58c1cc8fa027bfbadf6f84d15d6b38fff. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZHN82210603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5335f8bbab69823c5f79aae2b82efcfd688cf6eff72153a822a45ccc951e668. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN82210605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccb4b31ffbd19464573e4928e3067319fc9023d0c74b8eef0655bf9ff9d57b0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZHN82210601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6cb3a4ef6d3e80e32f46ed794d99afff919e982d70b73c7e291db611255019. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZHN42213966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa35e59fc9d1b1a20a57d54b144cfee657d5511a4c0ec8c69f4422f91d77a858. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN82210606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52feccfedf1d45ec0201bcb12979ef3eb5317f5f9918618158fb5b2a8a6f1178. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZES52296873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf981d23a66a35f0e2eae23e839e62417a1a00be3cfe1a2b123269f3374744ba2. 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/QZNWZ2216922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0464ca56038fcf7fe41cfd2a4ae5bb3047139c95d576c0b308a25b31c4cfcc9a. 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/QZNWZ2216923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29322eabc8d43b597566b3af995de1ed237a0ce7e96a23a3f56aae05dc7cb1ce. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWZ2216927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabf5cf66fe704a7dd3d084f11ba253f7db1f26dc8871295c9e4864434a9ce2e. 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/QZMEN2265383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bf28ca3a68e273d475776c07a3ca28055428a4438d8fd761ddfe6b20ad1f1b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZZ772467821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b28cb39c35173cca9e9fea9e2bdea2d384c7b8e904f4c621eebb981c73a1956. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEP2361456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1e866147bf885dd870bb4da92d5225f77ab623c27c2399a26064abc5d0e326. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZK6Q2287698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf4a22e0e8cd2279d184c9e9c7cbf9ea09ec6f4f6576c7fbf3318cfd95f00d1. 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/AUBEC2416100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d842faa228848f2fa710771ec3bc76e8efc0a3fdf4ac80a28181b87860ab4a. 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/AUBEC2416087.