thumb|Kari Tapio (2009) thumb|260px|Kari Tapio and Pia Viheriävaara in 1997 Kari Tapani Jalkanen (22 November 1945 – 7 December 2010), better known by his stage name Kari Tapio, was a Finnish schlager
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 0x21364b5aec388e2754859ed1032578a2ee9f866998da8eefbedb34f3a02b84b3. 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/a5166e5f-3962-4cb8-818f-dd7f5f16703d.json and https://artists.proofprofile.net/proofs/artist/a5166e5f-3962-4cb8-818f-dd7f5f16703d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Olen suomalainen - Kaikki levytykset 1972-1992
Olen suomalainen - 44 huippuhetkeä 1972 - 1992
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 0x8710955722246a3b7a46085e542c120b1933b54eece0526c695662caea8e879e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FIWMA1100567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c39d82f32cd642b7fd5906623725c777226b8c332bce8cc674f167692643db. 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/FIFSC7700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418e1de2a465df9ec4b460088792b6a9e843d8bee47e1e2350eb9aedf36294b8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIARA9500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f751b88e10c97d6d127aea936fbb75dc051c9f89d84c96b1de0e1813cd2148. 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/FIARA9500221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf332a2bc2a6448f01ab070164a4bc3627c229c30f8c784d45258d487eb18f3ea. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FIARA0800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf332a2bc2a6448f01ab070164a4bc3627c229c30f8c784d45258d487eb18f3ea. 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/FIARA0800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0b97d77dff24e5249e3d856b5bf186b18d2b4e2b7650cb11ad58dd42d95643. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIARA0700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d693a9a264d45c4564b3e3bfddd91f7c3dc0fd1fa7ff61d2ff54aac50d8a50. 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/FIARA0500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2807b4b4f2234cb7d227f553f5f79be139f45cd98e135410eef483fa03dd55f. 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/FIARA0500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42d8d2ccd020ddb0135608860fcc5be656eb2369b0bc80a425f636c800d424f. 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/FIARA0400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab66b25c74d9ac2accb97d37b7bcb2652ac829b9ceb409cfb9883b17bdfe1ee6. 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/FIARA0300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fce4458fcc12a0f56c57653395008ac84d621149334c17ac72c40d306a214d3. 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/FIARA0100163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee323ef16f89f8230d7ea5263a5556770c289c1f237e6a5de9d17b04736a038. 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/FIARA9900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e6402d549457a7cd2d34e6a88e8cfa511a0698428f53f31a1f5f8cd364e0cf. 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/FIARA9900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3962aa1b5179c7854ed083dfc2818a574b3216a5538cf4cf085c728abafddb. 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/FIFMF9201814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6bb03b2fc8c7c64cce5a6c92ebd60d1d78fcf87576997ab401555d0254a342. 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/FIARA9600146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324083fd09e1e2e6bef1d6283be3eb8c80f61d31ee092f22180c80c1a6ef9771. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIARA9600147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d130bb09ddd32cb101a809b22a43a1f72e83b5954583e2a5a1abfb198578ef3. 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/FIARA9500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4633e423d01b58a55256ad397a8675fef161fdc20a12434a6671fc19432203b. 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/FIARA9500161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d53e442bc5e86accefda40e910580b42feacafdb31d36883f38a76bdf36705f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:27Z), 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/FIARA9500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806535f04fcd5d1b1c3abe6e07c6d7817120fe229e89124cfbe2303c0e902bae. 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/FIFSC8300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbbbfc07e6619a20cf33ecaab217ffeacdf32342949533e5de7b53a42c76102. 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/FIFSC8300044.