Jon Georg Balke (born 7 June 1955) is a Norwegian jazz pianist who leads the group Siwan. He is the younger brother of saxophonist Erik Balke. Career thumb|right|Balke at Sentralen during the 2016
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 0xf582f734b46c7b30aefdf6e10fc0a4f33a4917b5e752475683a08e7f42a1adc1. 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/bebd9c4e-f54e-48df-95e1-7d6bbf26b8a0.json and https://artists.proofprofile.net/proofs/artist/bebd9c4e-f54e-48df-95e1-7d6bbf26b8a0.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 0x4c810755949ecbdfb3fe98fa9fa18bb86619c2cd49a57fcf4023c449560a491b. 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/DEB330704201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6273bf1d873f5ecb8b1f971a28118a28702d9b0ee8ea9b2da3b665308747db6. 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/DEB330704202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d6b8aca5dde1cc5af3f797c02e59b9dbb88a070930cd74697fd003d8fd3e71. 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/DEB330704203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003dd4515920427146a2117e5f8a2143e80f802a7283f6b1c5e085df61f7b78d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEB330704204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f664575d175e2d4d1286a79bc4dfea4dfc301f099c828228c84790181a0118. 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/DEB330704205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc89ac1adaf2608265ee09811fcf6f848d451a8b75287d72fdf34b45c79e6fea. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEB330704206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bd8ba4f95d6a54bd0e8fc51218e918b490bc85546b8901d0b4172e84e136fd. 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/DEB330704207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4202123790ab4a7685845eb85813a8d085885eae7dbd7427f4402c18f16fb0. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DEB330704208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f92e221f26d3f2248700482ea4a2268097c1e610a06c467fb239419b2a17514. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEB330704209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372addc501b54a458cb04053ebcbcc1ddb6cec1014638500b455d890b224061e. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEB330704210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a6c141331a5632ff6ca9b8060528d6c37e2854cd4d9f1cfe7a98f922f543af. 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/DEB330704211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6273bf1d873f5ecb8b1f971a28118a28702d9b0ee8ea9b2da3b665308747db6. 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/DEB330704202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f92e221f26d3f2248700482ea4a2268097c1e610a06c467fb239419b2a17514. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEB330704209.