M25 or M-25 may be: Aerospace M-25 Dromader Mikro, a variant of the Polish PZL-Mielec M-18 Dromader agricultural aircraft Cors-Air M25Y Black Devil, an Italian aircraft engine Shvetsov M-25, an ai
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 0x6ed77ce10cf24ca0dae8698e5866d73826d3422a79d2742e330b9bf72322f978. 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/2c438665-d3b4-4f2d-8deb-64a241644b79.json and https://artists.proofprofile.net/proofs/artist/2c438665-d3b4-4f2d-8deb-64a241644b79.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 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 0xf7130d4eed563f75ca4629a4901638837b6a42de7b9c8ca094efda50fb8da5c7. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCAHK2337056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42356a03b769ffc3109ebacf9e9fd7ed022b292926bd25184086ab798656f738. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAHK2337248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9882d6d734e6487a5fa71d1d47a01209c5ea5224e3a100812307c1c03570a7. 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/TCAHJ2387490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12371083c51b1dd1d5ca3d039a3c8d6c0e269eebc469c76493ecbccbd671b0a0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHJ2387394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afdaa29c9edd18ca266b32950252b3860a9935bc309bbe5c6c901df4cf94988. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHN2382334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57095b317d817cfcb7ae3db997cee9a819c513168cf55163bd324004f0744b0f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHR2397177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3991846b7cf28827ca11b70f2d0d74996d0fd80ce0a657d526738e238a0dd09. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCAHW2419515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f8027e839b09dded758bf8ba658f08887c8d3227ed427f3e855ad47a16ce06. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAIE2472486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3594c224f4d3641156eb22ba6762ee2cde792b9a946618f3f8807e7ff8f4f3a7. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAIE2472547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ec45b77fde90b0fa40346bcc023df85f7a655707822f793eb22f82bb71126c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAIE2472618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c02b47c0f94b718222e82a85e3f605f3344c185b947a519cafc51fe9179e4b3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAIF2472815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc15ff579a993671f65a0c7050ce87ca4e8542fb27949426a8076b3f06b011b6. 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/TCAIE2472839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38267560a1c0ee8623c799ebeb3ab158b547e67051bf8d4aff71c6c0c0cb0a24. 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/TCAIX2496915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726cf80e5ad03ab3d017fdb767bb3972414ec0ca799b79b7f0918b17d33a03bd. 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/TCAIX2497036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea41b58d931bb32121f12e47407e0d3f4f835c575748e82a95a61ba7b1a365b1. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/TCAIX2497071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd5806c2ec60790f9796bc32b7fd1a47818cb8d3692985564b8ebdd394f2478. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAIX2497232.