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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0666d1ddeb5a16cc9509b3676415bbc8e93d8fb035b48a60d28c77c62dd7d377. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ea1f51a-2366-48d3-b956-150de7f11e4a.json and https://artists.proofprofile.net/proofs/artist/5ea1f51a-2366-48d3-b956-150de7f11e4a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea89b5e3f2d622b5ef8a97446ab05994f7bd824b637c4ca5b100b7a27aaa23d2. 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/FIWMA0700958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce725cde157fd914eca5408d58244fa928fe7f386af747973cb818973222cf6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FIFMF6500075.
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 0xd79b9689ebe4e24c32f3ded291abca9fa3419c990b3ee2744f9b70e04d70bcef. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FIFMF1240841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dfeb2bd89d66ad75f54d07926dfeefab3e37aa622007dfeebe7812f539fe43. 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/FIVDC8000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddecf8a061e64e04ed3d024b0bb7f13b64d144d68482716f8624033168bf71d. 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/FITAT0200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3c5bf0bd2160c9537296e93e332a6881efd004102c5d55159f2823bf4f05ba. 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/FIVLM1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce5bd7eba2c848e80e2b9a31510a64288bc250eb3ae343ad877e4d54712c97c. 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/FIVLM1400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6a7b3fe90fd30b2d0746c68b0279455ca334f6a31a308f88ef4e909daaa5f0. 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/FITAT9800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956d8a249bbc16861bf12b3be9db0878af94f5a138d25b3beaec46fbbdae75ac. 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/FIVLM1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29ec86b98599c214014527bd5624059c548fc260434cd6eec60951fd2a3d4de. 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/FITAT9800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19c9cc58d5177aadc404cc258004474d90b2ba2846d08da9982a6004a5b90e6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIVLM1400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35d8fd265dd92113544cd59b96728b3a49c8a9e34d70bfef4935a07d08535e9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FIVLM1400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfac520ab7695c54c346dd1834ba1197d1373ce2f677a0b9f3c7ac830b09e2f. 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/FIVLM1400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dec7735dae73f3481f1c5c37477c432d43c72ff9aad0dbf30bef07206fd33a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIFSC6500400.
20 Suosikkia / Toiveiskelmiä 3 / Virran viemää
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1da9de025f42fe92d523f2b2294e12e91799293ed54ea361c00a410986f9f5a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIFDP6200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa187f52bfcdbb3b662828352f7ae3fcdb74dd975dd0db36c424f013932951e. 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/FIVDC8100122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be4ff55bb8810290f4bab31d999c875493fa4c7b8d1d8a1c87a4e15edf632f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIFMF6400012.
Kultainen Nuoruus - Kullervo Linna Solisteineen
Toivo Kärki - Ensilevytyksiä 100 v juhlakokoelma 21
Toivo Kärki - Ensilevytyksiä 100 v juhlakokoelma 20