Megara (; , ) is a historic town and a municipality in West Attica, Greece. It lies in the northern section of the Isthmus of Corinth opposite the island of Salamis, which belonged to Megara in archai
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 0xdada34a35b0548bdc2d7f39936e09b69e6e64aec76d3687754877a6ee58523e9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4f86f3a-3c74-4f64-bc8d-2ee7b34e490d.json and https://artists.proofprofile.net/proofs/artist/b4f86f3a-3c74-4f64-bc8d-2ee7b34e490d.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 0x45a742d1dfc19424cb9cad11a5810423bc48ab406cbad3fe422240a4634a6383. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFME1587692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511973d267ca86bc1e16f7468716b42ee26f6ca2ed8212c9b184ed094f289404. 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/QMFME1587693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ed98e457c1a0183438c695f4edbda7f548acf33c44e350d5068ec5e7453842. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:13Z), 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/QMFME1587694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda13eac199f844b74e8f4f281be8ca966d61d46ceda1de8b10d8f75fd73e3102. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QMFME1587699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c310e348bfeabeae3f8630c286f151f49289c8a1cab69c0449a4c66dcfd4ffd. 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/QMFME1587701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58784f971428da7009ed9a6335873b38fa4899ba0eaf488263528e587343fd00. 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/QMDA61807865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f111f1b195437ce4d031c9a7cb90949906ffbd591bf209f1c184de9b6cd9cfb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMDA61807866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6331e99c46a1e3c631dbde6d2bbee767b1cb477fc07ceb0da6dd4827937bd90d. 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/QMDA61807868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f8029b2a3de0fb7a1133fe6ed410f1ef4efe87ade5495c7ae5d9dfa16743ea. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:45:30Z), 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/QMDA61807869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b79362f6ffbc287656cf6ce5ecf7c311ef439ee9aa4987e13c2dde9d9644e17. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ES17E2201474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8295b3592a542213457a672d366f20bdc28051f57f2458c277c4b94d00ef7885. 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/QMFME2022272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9c328bfa4df33aa486759774dd07f6801aba25194fb0cc643ba35ddc713201. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TX2118718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77508fa3322bee9866f9ff3aafbb59dc34d4a28bd8d544577417090f931c3ef2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:18:16Z), 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/QM4TX2118719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7651d5527d8efa15cb78e52ed3279933ce854d03090cd6c3efc5bdf7c19194b7. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:36:11Z), 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/ES17E2201552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925f8b3230e58233f5657ba6b8d447b75d119f73a316c2c6705a6d893f7ae657. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ES17E2201479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bedfddbdbfcc18634ef7342620a55eb39b2caff5323c8d8a42f79bb621fe97. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES17E2201553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbec8c09b8eb60bd388d0a782db21f135811d5a91c0f8056bc38efde0385c2e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/USA2P2546564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3de0c9437d87dbc9ea454121719f6f79510fde2f7c295de72fce9ef04e427ff. 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/TCAFX2101295.
11:11 - Eurovision 2024 - San Marino / Karaoke
Eurovision Song Contest Malmö 2024 (Karaoke Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035ac7daed8399e88ceb317f6e85be1d624bdfea294f94f96175a229e00af740. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DK2DY2400142.
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