Matti ja Teppo is a Finnish schlager duo made up of brothers Matti Tapio Ruohonen (born in Turku, Finland on 8 August 1949) and Teppo Ilmari Ruohonen (also born in Turku, on 1 March 1948) who have per
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 0x835821d240143cad5fa13c1127c1732af411d342de5f52b18796a9b5fc413b96. 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/467dbb09-8bc3-44f4-8cbb-ed65d4064efb.json and https://artists.proofprofile.net/proofs/artist/467dbb09-8bc3-44f4-8cbb-ed65d4064efb.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 0x17085aff5d33971dfca056402f1c9e306d56f2cb2f136917f0556f625be0dbb5. 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/FIFMT8600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968a1f072731a65f563626e7934b60ad642699a31d80deacdf29115d41b11ec3. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FIFMT8200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b5d3b8e58f193eaa15579269b708bbd8999c4d39847792a13ee64eb4487746. 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/FIFMT8200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100c278d600289d0e4ae38f57a422ec36489deafb8b1fa4bd9460e28e6cc8a33. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIFMT8000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f96e3f447e2aeeb25cf497d68136c20af96a9c3440fd7656ea22ec180c04d1c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FIFMT8800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b543a5122d0efa5ed2955215fe4dc9264b79cfa4055baabc76290c155552e9b. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/FIFMT8300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d905076ac9410f9f2412459fa12fbd363b1173b964f9d9a5941750b150c0f7. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FIFMT8400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437f435023e5aa4f2e5116fb698fbd36076f53660fb742ebfe8ea5e55534990c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIFMT8300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ff794fb964c493a0f9c6146e747acba7a542711c40cbf8e3a91abb783cb518. 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/FIFMT8100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e4a5d0885831e2fcc1e84c1dd810a1ea872f1cec2b8694308951979ddaec98. 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/FIFMT7600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0d0f7a2c834c16fe15cd38d3bb429b7f7ddd0bfd0778a3cb49aad7b6d53242. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FIFMT8400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f6dfcbb228e9cd9affcf8507d336915f4f0b3e3fe64f1e3962d7c6ce8b54eb. 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/FIFMT8200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf6744a74590f473b36e2bef682ce4a787230bd267089ec0f9ed08510885654. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FIFMT7600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872db021c2ea637f0aa62f97f732d0fb59a59aa6f98186b83c878f7131cc1f1f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FIFMT7600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ead2cbe196b3948feb07ec54aa8837912d3c416e067b2b66b9d24f5907e8bcc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FIFMT8100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9d45d64ae0f91149d545be0858b11ebd134c6f40737f378f15cda221332177. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/FIFMT8700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3b386e06710a083772cb584821615008b1421d84fd43f3475dd153777ef4b5. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FIFMT7601300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7968be0158c7bfb4c055019c5453bf5369768dc159c212a5534aeb077d7499ca. 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/FIFMF7000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb4de8587b6ea492f5660123ccd40b4e1b77206aafeb1013aaa56c93f32af91. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FIFMT8300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafadacd6c17cb2b1ab2714ab12a2f17a2a2f8a1782db98b8af46648655628f46. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/FIFMT7700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0f27f785365212543bc94230555f7e771aee804dae3513ec4e7aa9a733459f. 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/FIFMT8300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b3869cb4ae6aa5aa258c34bda14c72e4685bd89ac2704e289675126e0bcc5e. 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/FIFMT7600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317a874e94e9d7f71a888e690ec9c53259547362a7e2a48755bfe923842f8afa. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FIWMA0500913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda325a77bc753a52625dc2ae062fad035e72ca856c57b913e7847eee1144ca4e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIFMF7200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8242b46a4233f5c72c857f680f821a17c41c23824e60662f58a9c3dd4881f92. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIFMF6900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cfc3ed999ed5550c56a481401540ba22005f6028f8a99afd0f896464bc06c8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIFMT8400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ee7991106c5d6df1f06ed3fe0f554e1076cdc708f624204c324d9498aee1f6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FIFMT8200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17085aff5d33971dfca056402f1c9e306d56f2cb2f136917f0556f625be0dbb5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIFMT8600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d8bba42ac774c810804df686c4543942ffaa94d3045291377aab887b5d207c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FIFMT8300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b543a5122d0efa5ed2955215fe4dc9264b79cfa4055baabc76290c155552e9b. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FIFMT8300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37026cc08a40e646249e793eac21fedc952eb9025a468ed8e0a1cbee41b65204. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FIFMT8700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d5b4963ffb162dcce25f929dfec765af9768bf27d37233340b7221afe3b22d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FIFMT7700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b148731939581a74edff904141863ddb06412d5d1fcc3f4b53af62770a94d08. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FIFMT8300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9d45d64ae0f91149d545be0858b11ebd134c6f40737f378f15cda221332177. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FIFMT8700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5e112158af6031609a96e0a72c7c70cd67422ada27fffc9fb25dde077c66c0. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FIFMT8200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f96e3f447e2aeeb25cf497d68136c20af96a9c3440fd7656ea22ec180c04d1c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FIFMT8800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ee7991106c5d6df1f06ed3fe0f554e1076cdc708f624204c324d9498aee1f6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FIFMT8200011.