Kerkko Klemetti Koskinen (born 7 January 1973)Kuka kukin on 2007, Otava 2006 is a Finnish musician. Koskinen was the founding member and lead figure of the band Ultra Bra. He composed nearly all of Ul
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 0x372da616040dee82e32f8a8a94511acb6c214b5b78ba51598ec78a3d737103af. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6429b3b-df5b-4b5a-b24f-87010717f649.json and https://artists.proofprofile.net/proofs/artist/a6429b3b-df5b-4b5a-b24f-87010717f649.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 0xc4da25b80c9235ee0fc48fc05b0d62a9f5457275be50748c53ad83b83903d3e4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FIJKA0200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a89e1b73bd4f8806d99621285e5a36033512b2f7f41d4a79514e48f2bc508fa. 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/FIKHY2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d97877d803f3beb75c4e2b9da5ec4d89d10d5d3437da06e436ad6cec67c029. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/FIKHY2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaced0335c747c25d14e86eacf200969b03fd1bf7ed53883844e699a1253f117. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FIKHY2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fc4a644590ad6ce08f03729104cae3752b2cae7abd3c25cbdcb88b8993af66. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/FIKHY2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16d0039369f534dd6a61a390249e2f13d034b6389e6f373d7367adc3d6895fd. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/FIKHY2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dd46b44cb682108d14d673fcfd5498b8f51a91ec754122474d5141d8577793. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FIKHY2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6894e1220c058f1ee2ccceb18be7e34a57c878f95c07563622fece6334ab4a67. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/FIKHY2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200a310772622aea93b7fa392438cd0edbc1d6c0f9fe658f93c60cd90a7b2532. 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/FIKHY2400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82db8897264f992aada662e6a73835b6bdbbb7496c1a570bb5b76c1e2534c594. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FIKHY2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42850a758e5e9209c6f05f9b93886dcd82657244085b72730f83507802ed2467. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FIKHY2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbbc61c241c94c6d2c5b304b22409262520dbf6acbc2440f11bb9fa9aafd72d. 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/FIWMA0900425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad6d43e11a0103698767264efbf07dab542792daa92f8fdfc8d1ee84f65a9d9. 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/FIWMA0900423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f6736fa4d45c8638f82668427858f24c7af4f92cc357935513583a8e5cd4c4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FIWMA0900431.