David Gregory Ling (born January 9, 1975) is a Canadian former professional ice hockey forward. Ling was selected by the Quebec Nordiques in the 7th round (179th overall) of the 1993 NHL Entry Draft.
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 0xe51b2700631d330b2749d506de09922862c311f06b819ce612d9dda7698816fe. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7187b78e-0290-411f-ba32-aff1a043591e.json and https://artists.proofprofile.net/proofs/artist/7187b78e-0290-411f-ba32-aff1a043591e.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 0xd6db6992a91f522d8286fe1c2716d341da213111705487c0a750bd432a963acb. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAJN2577625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a72f06c263ce07e1ca04bbc03cd9c7f0459485e80d1a289b1d0655f598c289c. 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/HKI491504126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee6d8ada6f707ee311debc339d0e8af2be71e6f87d0af30054a5e0a896ada0a. 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/HKI499480114.
華納廿三週年紀念精選系列 - 葉蒨文
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedd04ff6f95c41308edb60800371a88ce72acad4e33ecaef8d97120cdfaa50e. 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/HKI499503211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedd04ff6f95c41308edb60800371a88ce72acad4e33ecaef8d97120cdfaa50e. 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/HKI499503211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedd04ff6f95c41308edb60800371a88ce72acad4e33ecaef8d97120cdfaa50e. 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/HKI499503211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedd04ff6f95c41308edb60800371a88ce72acad4e33ecaef8d97120cdfaa50e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HKI499503211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedd04ff6f95c41308edb60800371a88ce72acad4e33ecaef8d97120cdfaa50e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKI499503211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedd04ff6f95c41308edb60800371a88ce72acad4e33ecaef8d97120cdfaa50e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKI499503211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67addd0b1154add914fff8c923126a374c7d50a8c92f952050646d2da8adf628. 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/HKI499803321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a0c28b480c76b321c114406b6ff1ca8c1e3c83f56f66819a76d9a6541f36bd. 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/HKI499404126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a0c28b480c76b321c114406b6ff1ca8c1e3c83f56f66819a76d9a6541f36bd. 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/HKI499404126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84151260b77ae1d47c5cdf004dc8ad8157e7ffd0dcaa21a863c3f3d1d3a9c79b. 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/HKI499804215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a0c28b480c76b321c114406b6ff1ca8c1e3c83f56f66819a76d9a6541f36bd. 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/HKI499404126.