thumb|Tuomo & Markus at SXSW 2017 in Austin Texas USA Tuomo & Markus is a Helsinki Finland based musical group founded by Finnish soul artist and jazz musician Tuomo Prättälä and singer/songwriter Ma
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 0xe8fe56fc16d97097d702f9891fdcf2cd33e734b49aa9e2b93212ef0636e78b9d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7567ec66-e929-4e09-bbef-5824cd292b7c.json and https://artists.proofprofile.net/proofs/artist/7567ec66-e929-4e09-bbef-5824cd292b7c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
E-Studio Live (feat. Verneri Pohjola) - Single
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 0xc553b73665f60ddb721585c32c1c055337420bd78e053234e6285109fec1dcc4. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/FIGPP2210001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e47e304edf829d0f7444c2c872a86932a0cd33d1305eb5f4d4c8c45246f758. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FIGPP2210005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7f7dde5c9f5269e1a29f0de71504e91d056109ee28abf0d2f76855464958f1. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FIGPP2210006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8df295ad8a2b94eda9873d88fb7227e4072f9bd39a1c99dc1121b86c8c60be2. 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/FIGPP2210010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac998b645da01c18f728d3c0de305f0b339c979963e4ed970b4bc96b067dafb3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FIGPP2410001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c8107c32fc05e0e22650c91d142d5e7143a4d1e988adf3a8ea5b21858fdea9. 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/FIGPP2410002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1713b0125c588b7a26b6a83c9b49012dabfc355d9fe40f96093d56542744af3f. 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/FIGPP2410003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97137a4e4e217083705c5d6c3507837b1f7f6465292a0e6d41a488d7faed5be5. 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/FIGPP2410004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cb68b7a91c76c97d589145ba7eff92d1b3b0151ba82726444b0a79e7458e3d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FIGPP2410005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc7755c1b062b6ae8a90c23bf10ed1294c37f55ca76ca2a1a964e42cbdb3a33. 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/FIGPP2410006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a4f824a8cb7fbc6f5a6c5f72eeff6a9c78aff16070dbf8ea351859d4e7ad9f. 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/FIGPP2410007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f5bac810adee6bcb453efc5698dea56f231b08794d3a57e0126d9d48072f7c. 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/FIGPP2410008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef74963dbc33a0b9201625dbf656ecae9ede2628d83d1309d4a8a139fd1adbe5. 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/FIGPP2410009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c8d1e68e37bb3cb243a0f474c6d7d3b016d5d6cb1c69ed0831b5d370b6ba19. 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/FIGPP2410010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac998b645da01c18f728d3c0de305f0b339c979963e4ed970b4bc96b067dafb3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FIGPP2410001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cb68b7a91c76c97d589145ba7eff92d1b3b0151ba82726444b0a79e7458e3d. 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/FIGPP2410005.