Donner may refer to: Places Donner (crater), a lunar crater Donner, California, an unincorporated community Donner, Louisiana, an unincorporated community Donner Lake, a freshwater lake in Cali
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 0x87dfa96e9e056a7f38e044efc785887b8db323047024c070a2219ee536af63ff. 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/d0ed15a4-29e1-4a11-a9f2-c369b8a957d7.json and https://artists.proofprofile.net/proofs/artist/d0ed15a4-29e1-4a11-a9f2-c369b8a957d7.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 0x32cfe282d4e2a258f6a1eacece5a7cdba11a111d93effedb2d5307e516b39e1c. 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/QM6P42211704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa965e3ff7783bc899ddff9afbac9f07d57d48774f739e0196c075cbfaebda6e5. 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/GBLV62215853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cf7e0ac702c763a79bc1310173c73f2b798a62e33f547b4af1dfc5cc2768c5. 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/GBLV62310205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8affd511bb74aafa650580a56831fbec754f7829ecc6e4cd9238b4c45ab94d. 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/GX5MX2355247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7ae6794d1c03847c6d9d86613e5a48ae796849710fda202ab5e9c186c29a3a. 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/GBKQU2385032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160c4a9787cf4a85011a94b6b763318b7b9075988f0cdd94c62fd0ef3c8f2501. 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/GX3HH2370630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ae3543523d20785066cdb8973fb5aa66db9ebedeac0f23f71fc47fe1261ad1. 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/BE8LH2300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacfce2677ce0835739a0696ee7bcaae6ef7c154d480483b788bacb6496994fb. 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/GBWUL2330130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee872637290cd7f5b45cf86b9cdbd8b7e32b8de56339ba0f0cf7ee96a95769d. 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/GBKQU2345185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5b73cb5c9e67a65941321fdf391631b0de02ec92a0fc077b4f0920562fcb2f. 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/TCAGY2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a82749e09cdca4a3d151d105618fd2f5a8596056dffc2ec0e0cbd38e933d139. 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/GBKQU2321229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292aaa73672a055e0cd99b6a3a68121a5d9808005ef5458fd702653ee06daffc. 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/GBJAJ2300187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ccb86e222f56d8dcd90fe9794af5ae71a5c1da1917d177c48b05920a140795. 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/DEXW62300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f386f11285f25eb512b536f4a2eab9e6550f3ea5a4cd8447a5073b010e80e0. 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/ES71G2233539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2076e9f60a8ca6b3ae558a4efbd85bf55080648a09398fd063da907a11fc935. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL4YD2200183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408f87faaf4470f149d230aa67c390389d91ee144491c91077d8a046c490dd7d. 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/QM6N22288568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a26720a0590de14b9d875cc62f09e22cc146555f5017f6e72999cf6bb9e6a4. 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/NLT2H2500289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb602a815ae41d7be07c1e1bd59c9f90513a3473cae80037bce2aee323b80270a. 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/DGA092368036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da37f60824c0683e9cd9c1b3a97eeaec9a14bb3d309d680b75892fa7eb14191. 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/DGA052392399.