thumb|Kalima in concert 2016. Kalle Kalima (born 29 December 1973 in Helsinki, Finland) is a Finnish jazz guitarist and improvisational musician. Biography Kalima got piano lessons as a child for f
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 0x87190287beebd542609940a7df9e9b9e1d294e6fa06d60cdd1f70c1d277bb5ed. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3ff3652-114c-436e-9b10-781b6443b63f.json and https://artists.proofprofile.net/proofs/artist/f3ff3652-114c-436e-9b10-781b6443b63f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Strong Wind, Deep Water, Tall Trees, Warm Fire
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 0x4ad73dc86412f8200d0224140f61828b5ce74f57bdf7f1d94d3004da165c63e3. 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/DEA891900400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fbd32037fdca9bb321c92328d900ce26af91449c69e519878c13aab1942eec. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEA891900401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a778a349000572e876fccd25aeba3362d31889ebecb51f0993a21d855336897. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/DEA891900402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6756a8bf0ef449622db3621dac9f8cdb134f83ad5b9679819e5c378e43e5a492. 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/DEA891900403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780e77c3aece1de6ab8b074701d75697368cd5feb3ff99c0628b9726adf54f26. 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/DEA891900404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e245f11e6ae1edd4c4edb985c29b7eae1aa57d3598a968d57ed5252ca2343fa. 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/DEA891900405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026ecba90232740bc92f050058e8a828bdf95d26474ee26395972831b4559b24. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEA891900406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8134fed3481f763797d32c99141078401c2ffdb90067e77671d6ae6c93a0a1b8. 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/DEA891800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55de6b2f998affcca6a79a1deffc1a249ab483faafbb86eabe100b710ecdc1be. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEA891800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fcd32f8dcc88abaf9dcb79e94bde5357147e5e7d8f2120b5bad202abbb9910. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEA891800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0330c947b0ceb500aa9749c7d6bcf3ebbf2b626a50c52dc1bc4ca38beb50126. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEA891800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b95bf569f0ff3f15373659d19b755c464a621c816f416a747b97ff53981ff9e. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEA891800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7836c517518b322bfe12902fad46978fcf73974a054c1d5820a81907eae0cbc8. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEA891800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba8d4a2c0c5d578b5038537cbd8a2c71d75982c66e3ca8d9ee0ac6c3e74fd42. 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/DEA891800037.