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 0x1391773911ec56a75e72d4215190dd60c6f158acb0d15e8f1b26b8ab531f72a7. 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/51de3ab0-f7f0-4ea0-90a9-2ea5d659e6e1.json and https://artists.proofprofile.net/proofs/artist/51de3ab0-f7f0-4ea0-90a9-2ea5d659e6e1.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 0xb86d89b02611714ae44fa763d8d3e899575bf43ac9ca22aac0a0460347134d2b. 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/FIURA9500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfbb25842eb37026a5c5ca485b116cd2a6cd06161ebe9ba4a477d7dce68172f. 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/FIURA9500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc861945a04b8d12a2eeb13a4e389e2a8b4049ae305da6070e3de0ca70343d78. 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/FIURA9500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd23ef65e62be5f686b9fff1087bb552410708f73e68b2af906d18b34ae2e618. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FIURA9700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49dfa8a9548b2b571335d4c5ddf16744b522827dc8e4470ececbf91ad8770cc. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FIURA9700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c1418f9aa79c926cf5a588fac061a2ca217ce239812ce3b29c33f829b5aa26. 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/FIFMF1245488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc774ae474254f7d2ad543ee7c8adb2271a18fd882253ceca23ada9d4621b9dd. 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/FIPST9900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b7dc36b81b4722c2a5dfc74a45d67ca763b6e05f11bb8fdc3f6d139ff14abd. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FI8FR0800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada3cc5d0d9d80a397f509cea7ac6f1d1a142794006f4f780f07a2b54d6652f9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FITVD2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3fe51cfb638866670ce2de7ebba58541b55aadf2f8a5ac77366204dfa9fea6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FIURA9500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bdf4cbdbd8d328c9a977d86fb5a7271bccc9ce6f61bfb41b6952521e6052d4. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FIURA9500034.
20 Suosikkia / Iskelmäsuosikit / Hento kuiskaus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3fe51cfb638866670ce2de7ebba58541b55aadf2f8a5ac77366204dfa9fea6. 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/FIURA9500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cf8741028ccaa51e64b799ec1a2f29ba1c4b05468e883e158c19cb114efdfa. 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/FITVD2100002.