Hartness is a surname. Notable people with the surname include: Ann Hartness (born 1936), American academic research librarian Helen Hartness Flanders (1890–1972), American ballad collector Henry Har
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 0x8ff6542638151e1ab47dce81cd8fd2b9053158c6c67237ba7a124706bdb936fd. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e1d5dd8-810a-4370-ad05-a82655eb669f.json and https://artists.proofprofile.net/proofs/artist/1e1d5dd8-810a-4370-ad05-a82655eb669f.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 0xf5762beb5f356b9e3fa06a2a325ca6191c91af98428fbd165f1dd1149cb87dec. 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/NLQ8D2101146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe77001e80a9a6b99adcc4e77e75470306773ceb107c4b96357843540a52fb0. 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/NLQ8D2101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c8366aa1563be75fbc65b3d0d0a240004f7ec429bb8729c370714781e139a3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLQ8D2101071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fe9db69247f0f15dd7f12823b5e160e778eedbe23dfa0ead219f76bc2cb755. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEMA61904281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e09d780d622230e85d7b46977013ec9bb7c0231d2c48d54c934f6ddf43a4fb. 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/DEMA61904461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26fc3e9cdfd4593753cb9b41b66cbce23101ee884207355ddd3c50297c82ac8. 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/NLQ8D2100706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae02935527e51c6f073368a68d019032376355960ee265f94d1ac71d633f83ce. 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/QZMEN2483331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd1eecedf29f263f6902506f99c20abd97ba889bca88800e4a0fb103ca46d03. 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/QZMEN2483332.
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 0x133d45e2aebcae8d65b85b5da01f1f06b02f13c2d83583410e2c57456da455b6. 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/DEWW42400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8187dd27b83340fdad67015aa77046ce9e94a369e7a02503ae11bdc9b9b0c89f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLT2H2200842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5f2b7ed9f7c322aa531893dc8defaacc227c67f42c42bd224df15bf007b63b. 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/NLT2H2200443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec23c0b83130fde8807ed7dc2a238f5cd659e8b4686e94f2f48d761c67b1d3d. 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/NLT2H2200371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caa6fef76df6f4fcd8391b2d803b89b3e8b61b98f6e1ed9e72f23b16a8db604. 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/GBKQU2245764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318542aad5dc48127b908c6336d6ab79add7199daa3cf8f6c1fb19ff78934ea3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLT2H2200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc388bb9465b7c45d257ae6ae64996841bf2ca0ea52b5fce72c57d1c32554a141. 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/GBSMU8800455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f79c60a1a2fd1b83b75f6cd768d49029bc95c11a976c77039264a8b3b69140c. 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/GBSMU6843639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adda82fc7ed6d763ad1b482dfd4963759bf04a541cfd0d237cc6d28a6396d20. 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/CH3132200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d856df021e208824d0e5b28d9d74a6b23e846f43e9f6e31e2c52c69c0faea4. 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/CH3132100485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbcdf9599939797a576c9b658071da7d3885c7973baad6a0f8fbeabb92dd6b1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH3132116281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21a35016f7289618501d0837dcc9c4005f517ad9748b874bc4e7d7343e005c3. 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/CH3132216495.