Marteen may refer to: Marteen (American singer) (born 2001 as Marteen Estevez), American singer and songwriter Marteen (Russian singer) (born 2003 as Mikhail Alekseevich 'Misha' Smirnov), Russian s
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 0xfea6bf694214cdec41e6ba6bd335157dd3503024dbdef412f7e4d9bbf82eef6d. 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/5daf365a-5554-4be8-9e71-f50142f1f55c.json and https://artists.proofprofile.net/proofs/artist/5daf365a-5554-4be8-9e71-f50142f1f55c.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 0x5a89c81550012691a177b1ab54648a9ae3927fc6a8526493e06fe7eb120a4e3f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/USUYG1108982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bdffb1399ec6c9f00b0fdaa839030393b5c1ec47b3a6470fe87dceb37745e9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USWB11800266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d32f70994af20fa13b2fd5e3e28484ec7a4294975eaa0c9f647a5b56b05187c. 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/USWB11701232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1ccfb3932a5cfb0fcca6d72df92f99b24af4727f546e68f2ea360a27ac9f6a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USWB11800268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab1803c507ed5f2eb77a6a06384a5b34f658c5ce7631c59630fe99d1a1a0b30. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/USUYG1267895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5ad3f7d6ae76ce412e5ad6fb1fc890ccc6f442f9eafbd25b658f7b54776517. 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/USUYG1279558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1498c476ef9bc1c8df2a02242f3ebb34d1403a98a5fda3d1a3b6c4fe099762. 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/USUYG1281954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc3a6d0cc98abe018a22b2bd7f661efdcd351cd5fc5c9c8867b1ec44481b86d. 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/USUYG1276142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd21b9ed62c47a8faa67e49624912647fff172a25148943dcfa3ebb77a118118. 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/USUYG1279559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c364d180bed753ba9d6c1fc6b2a0737c22eefa65909c2c2358a401437e441f. 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/QZES91835742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8bf89d5b2df62b9a8eb6d96c02a8ee0e17475f44ff076f10624b540a448e87. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUYG1279561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab1803c507ed5f2eb77a6a06384a5b34f658c5ce7631c59630fe99d1a1a0b30. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USUYG1267895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a80a159e1cfc556a4db521821b5c67c94533a9498f8065ae33693a4b329df9. 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/USUYG1263221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d03b73182eca645a14d3e950e183d5f3c0eaee7df9fe5adfc612abaf201e2af. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/USUYG1279565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019cacd33130f55578a962834dc29d956853b30f331d737965c729692c3ad172. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZRP52231939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2e720d3a441c0cf58bf1f4cbed3a46a1a115c8c79c4b4d710e8adbca3053df. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN52571048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab8e2d729ae3f27006a9146ce37e302b15efdd7027a705cae1f23be45b9bde6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USSM11808563.