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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772e9d7983b570f6a8e06e9477b12bc61d938233154d9e7fa1378e9cbbcc90de. 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/f1bcf7f0-a0a0-4a5a-b605-9a8d1cfbe7bd.json and https://artists.proofprofile.net/proofs/artist/f1bcf7f0-a0a0-4a5a-b605-9a8d1cfbe7bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kaigetai O Mahalas (Zontani Ihografisi Sto Studio)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3428ce11acc1a11e2626a0d3e8b55beeebb369732a326f5c72c5ce522b5c2182. 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/GRL019000298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc425c01c396736ed61c70f3ab92eefad3c25d5fcdd853184efc90273fb044219. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GRL019000299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7d7895b272582aef23e32f05454994f0adc4e0a20791f243cfd7c98a214865. 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/GRL019100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b651aa8535d2f922734227fe45122c0f9681b2258d47e727f72b01d92b17aeb. 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/GRL019100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818e1cd11f80018ecdc51455702c357c61882c3a1aa7613f205f20ea3cc62224. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GRL018900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf439c651c4ea42abbf0735a7a52d6c68879bd7bdfcfd5cb61f3257490f162183. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GRL018900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efb269f2c9b2570fd6f07c1cc8842b47b20eec1b190a972064d821dd041219f. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/GRL019200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42e3c78c8faf50713efebcd2e9adad4ba15724f944a30a1a7edaf5f7339a5cc. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GRL018900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefb41eac81966bc4dea3ba98d46f614835ba8c039f3d5b2cb5511d4c496fde2. 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/GRL018900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6951fccc135d8316e93d7e677470e2d15b5f568f2b84f101bb0cd7eb9755880e. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/GRL019600767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8da7a524f045f75a99b33c278460ea0aad5ec01499dc4b39cd87d8ea9cac4c2. 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/GRL019200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e628ea18cc7ca23f6cc044393b92e98eef3d813748623b5557d42e0a853d36. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GRL019200236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45333cb2deb79e98e34d710b5f9f8122d0da59913285bb5843589da216c29313. 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/GRL019200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef7717e0a121883186e3cacd1a6aacc84948aa293c658f42d15f13b83b13d36. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GRL019200242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7b4940cc9fa472672cee83756baf1a79a0ad1f7a343e276800016ce5939e9d. 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/GRL019200243.
20 Hronia Makis Hristodoulopoulos (Zontani Ihografisi Sta Nea Deilina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05b13443cf61f8048e7a4cf6b1bf046aa257d8d6db0d00949b4755a5e529631. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GRL019200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8ff0a552545db7c2781a9610359ba5648d67870dd12a2ee8e0260b48a8a235. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GRL019200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877d015df87f038f3cbeeee452c9515f529aa52bc817a5095d6049a7bf9af2cf. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GRL019200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b346b99d530428b11c747118a7ad15816aec5b238008dade070739bf15fd16f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GRL019200016.
30 Megala Soukse Tou Maki Hristodoulopoulou Se Protes Ektelesis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f91d9587cf3de951486217f608ee863ad073634fe7ec96e4e5e1ad471160cb. 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/GRGM11800221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6951fccc135d8316e93d7e677470e2d15b5f568f2b84f101bb0cd7eb9755880e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GRL019600767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c019190fbaaba5732227949b22e7a713552d70b1de8e55e3c1b17c096a649e7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GRL019000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546b27c73df4961dbc143e9d4b4c1b4ece46b7bbef49f4251312befc7d1acc4d. 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/GRL019000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654ae9b0824a63facdedcf62e5e4283551ed772fda57cc706060a6c24542f693. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GRL018400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d6155d5882466e3ce1b25807b62d7fd29c9eade2a0b846585bb9d79edd802e. 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/GRE019700157.