thumb|Yuri Honing in 2024 Yuri Honing (born July 6, 1965) is a Dutch jazz saxophonist and composer. Career In 2001, Honing met Paul Bley and recorded the album Seven, featuring Bley on piano, Gary Pe
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 0x965968681d8075b23b72d768735036d9232d6ae36a530b3760910aa3011afeea. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/303f88ed-a8d6-4caa-8e00-d2e4536b589f.json and https://artists.proofprofile.net/proofs/artist/303f88ed-a8d6-4caa-8e00-d2e4536b589f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880c08b4ea327fb477058fefc513ad385988a230f68dad61917d8ac12779c67d. 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/NLB152000462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621013574a7309a85f1db22d21ef0fcaff720b5d77fc496cd2588bf1af53174a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLB152000465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1192ca2602e0dfa3c24d1aa478ce70af374aa07261d0f1e7e32a06b76ff139e5. 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/NLB152000458.
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 0xad2da72fd5608f6bf21da032476448021c3f8ff3f5b9e576699e4640e27ec6e1. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/NLB152000459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7794b44aea4d47fd5d6b9ece044e7b51091c16647050ae769e83a28ab011a989. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLB152000460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11d1a527fc86ffd64af6a7a6be4eebf8c67d6f4f79a166fbcaa134a3ad259e8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLB152000461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169f04b2dd2499d667054bb6870b8d55f99c2ae7408900316dd4ab4a364933c0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLB152000463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6d67011f5b3e1b01e813ba8d21475926a6ec024643fdd5c19f769ecd1ab8f9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLB152000464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dc3987f7d081df73fa93f16c4a8b364d263654102eff514c52379aecc372cd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLUN21200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4206bb2414ae5fc188ddc7c7f5cef6af85cf9f352f5014770017416d3545c1d0. 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/NLGV60900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c91205a04bfdfe620ec26e85fcf6b820c84441d719050a306191ca44c6ac788. 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/NLGV60900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb79b344b783ceb69b09e98212588075935b87476c28b840275dd23d8879d82f. 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/NLGV60900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4986e74d3e557b61e56cc6e7940aa117732c7dba1c82bbcc0a82e2556b952b1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLGV60900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670d667399cad1b6d07abd470e84959330741669117274f9dcfabd2923e21676. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NLGV60900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd9dee9f07d5140d13ca84f6bb8392ba9461945db24b922d0189504f854c1dd. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLGV60900009.