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 0xca4e85499facc50a9dd211d8604339cafcee1c57803b4b4be118538cdfde2b31. 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/2773645c-5e67-4f2e-a207-4e8173248757.json and https://artists.proofprofile.net/proofs/artist/2773645c-5e67-4f2e-a207-4e8173248757.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tampere II (feat. Mikko Alatalo & Sarkastinen)
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 0xbe3f03138427742eb75d311351973e3a56332799f497a2dbc986648a3b266c01. 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/FIMRI1500008.
Saravon Pekka (feat. So11 & Tappara Fan Club)
Ykköset (feat. Costello Hautamäki & Jussi Aaltonen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361a7f1c556b15c8d3345326f739ef1bcec8482d0cab03bef775b2ba1ebb86c7. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FI3MC1600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407f55d9521ece29d01b94ed303cf441fb93db316add939edf1b0fc92df071c3. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FIMRI1300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda80c130dab4a5ec3c512e8ddef0c68831756d9a1716e10a4865d44c607bd34. 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/FI3MC1600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffd9e4c97dca9b6db09a1202fafab2a1937a10d41e7f93ce9e7bf40be228403. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FI3MC1600029.
Saravon Pekka (2017 Remix) [feat. So11 & Tappara Fan Club]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c8f660363b2593ac597fa42113ee05627aef31ffaeb4a9359f54024697f119. 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/FI3MC1600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6e0f0435e81c50adbbc404f3eff6f84385ba7acdb068f3000aa4bde3a2f7ef. 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/FI3MC1600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b91a9492bfe0e1e1741c7f3f7687442c760fa24e33ebffaf455e99e36a31fd5. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/FI3MC1600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5e46be593387b0de39cd84005e4cd242930b6dcad5ebdb67d8d448f0737646. 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/FI3MC1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc375b7716e24f188cc3bc23a07d65baaa796631afc83df3634f13ff579bbc477. 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/FIMRI2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e668cd4ab029c9b4dd789608894ce5aa9164e153c0fa12afeaed93bc1c4b899. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZNWT2024131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa875b93a80c3371b271e1eabc22fc413a3d585b0d1a43fb7d84a6f20b15a275a. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FI3MC2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed6e3435a40e67d1f6c44479b7f2b968702c33747da49e5987b78f167f5931b. 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/FI3MC2100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b30f7fa693ef09fc2a2d04cd713ebbfd7c4766dfd264f218575d0d7e6003ff7. 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/FI3MC2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f156351fd4f17b04eced2b5f0d1018098bff91ff47582a6e51635592443713. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/FI3MC2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f67b9e2aa6aace5fabeddfffdb413f5be0a31f666d319320335bee19dccd388. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/FI3MC2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd89a8dbaebfa9008f4255d3b8f0475c54eb162099463d001412ff9877bd14a2. 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/FI3MC2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35498ff767dd31cc2cb53e9e2852f91bb29982605a179351124c9d848d83c56c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/FI3MC2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3ac02da1220754bb4f43c4483cc25088f6c83bc9a51a21953d2c4f4ef65a10. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FI3MC2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65650bf38c7489012eb529e3225cd1ca6ecb9bf98307123e5a573683531d8a85. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FI3MC2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7fef82a1fae7bb4ce0af1ae09da396aedb455ddb8f32bc18e6cda9fc3c850c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FI3MC2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fdd8faf6e93108b7bba2f00eccd5a9f93b27064757ce20f796a38a626ee97f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FI3MC2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81db9a72bb8dbb4cbbe56f30d3104a21b457be198ae373c39a2a19d8fdb0baf6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FI3MC2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9ed603722d6a1824d5e1603d7ef0475707b72e7a39394ed79f0b6ccb136e61. 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/FI3MC2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4691667d63a79a07396619cde0f823bb66af06a4fafe9a4a3375cfea131320e4. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/FI3MC2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ff3e973077a3df1a1ced98e3f4e95103d45d381aa685e9d2f9053a9fc08a74. 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/FI3MC2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e00387902d24c1f903f1adf315162043229dbee24e46094812a98b73c93fb3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FI3MC2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81509971b15b4f9fc45e6263bb953b16b7dccc16fe543f481a8f820cee1984c8. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FI3MC2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802356593dcf3e3ba09e8a209fe6e3b8a3d5fbdf7d8f8f8c599e9ffe2247ad21. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FI3MC2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324561ab9b86325b2678361267a1f8eb9db14b97221a05ba6a286d27da406ca0. 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/FI3MC2500004.