Mandra (), is a town and former municipality in West Attica, Greece. Since the 2011 local government reform, it is part of the municipality Mandra-Eidyllia, of which it is the seat and a municipal uni
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 0x42b1b9344f9ca0157e82440a80ea0845c74e2a23b54bad21a97073fc5215097d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/209a4426-01fb-4974-8713-97eb422c754f.json and https://artists.proofprofile.net/proofs/artist/209a4426-01fb-4974-8713-97eb422c754f.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 0xf6b985e2c77ba6c8e53cabe9551580d0226f7dd265315e8871fb989fef1575e3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA52030734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9e1a5b9473519368136764f3bb25f251cfd3ea3b27d86b9c86f927be9ad284. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN52062087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645faee1bad4780a56c28b52542de1a84bb50b026bc3ff3a5526f3339dc34b9c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNA2114288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb957b13cb0f8cd19076ab7b85fc805f791e5448e559abfcaf867bc3c92eab99. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWQ2121315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4386f709d87aafe5afa89ef6348bb65ffd57bf011b432b03d5a1a0292e613c83. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWQ2121317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ff4f4eff094ad2de560db138a53d88df9dca8a514d63e849378d2bb5c7b2eb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:51:17Z), 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/QZNWQ2121318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e17e8848c631e7850b9a3d3414eeeecfa3d5774742f7edc61a185b27dfc9a2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWQ2121320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97efbf9af6ddfe2fc20c21d6ddaf19b603453d2a3a1f8fa286ab623ff310f3e9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA72297457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4071f7b50316cdae015d810fe249a3dd58a346d2c0227070d967ce5f683c68. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:39:36Z), 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/QZTBA2205555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1892360b3abdb1e0f86b5ef7a6f2433df727e9063e100c4f8a78daffdba9a9. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZTBA2205557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8add84900988f44d366ef3ca2560618c863658dc79fbd65e19dd25b27a1d3550. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNWS2471193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe984c99303e6eb2595c9047fe78a96ea44d511e14c2973121c4a2d80b633d82. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTAY2435196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451b9ed8f580d777524c7175500bf8dc5390c0443d102ad7fe741a662b45119a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB92445220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e4df205498ad903355ea59e225d167f1e33268c9a6d0fc0efdd974103f4525. 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/QZTB92445221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7552ce2262bbf88919ac62da5fe3bdf51f0f9bdccd6713de0750ab1f159e0c69. 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/QZTB92445222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948e10951b774fb387ae065fd85e01cd33e50de007c1c8244dff7f664ab5da4e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTB92445223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc539dbf5c472dcf62d7339b596c294816198a87b514c98953b8a5b80f6249afb. 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/QZTB92445224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ebb202816e52c3afa2f87e4302efa811c95b3eb608350cac33c04a0b27a0a1. 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/QZNWS2273621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeda371d46e64f5263993c7ba3600142861ee1649b3b33ccd4389df11a1dae48. 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/QZFZ72199016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1108a6796abf29114fbe0691f5debc1ef741c0ebaf216bff4fb1b49118e52c3. 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/QZTB62402546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e402735c48e4e967722533cc3d9ca0ad35dabba3be5f4a8a82e3ce4863008ea. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/QZFYZ2059145.