Andy or Andrew Holt may refer to: Andrew D. Holt (1904–1987), president of the University of Tennessee Andy Holt (1910s and 1920s footballer), English footballer Andy Holt (footballer, born 1978),
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 0xd3e08f01e99176e6c47bc221ee82d03b377cfb3f4c9421ddb298d4b03d2fafe8. 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/213ce20a-55b6-4662-922f-6359c6dc4728.json and https://artists.proofprofile.net/proofs/artist/213ce20a-55b6-4662-922f-6359c6dc4728.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 0x3d1b116979efa247d3cc270e8386dd2aa94a7441b55d7207a1095c44fcd32ee8. 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/QZJ4R2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89c1f3e6f03be6f38c49ca93fb98a6976ec6c318f4e276c63e6ecc804deabac. 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/QZJ4R2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bb8bbda259ce0cb33648f00fc74b471e105f706973791701006984710f6b45. 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/QZJ4R2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917d49df544f1a340ebf510655830a7b316e516a7ea19fbcd135e647b4b89be4. 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/QZJ4R2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4d2652eaba6c2ad3c82808783b7b022c4db9dc2cac5bd57d4d8a9757646c67. 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/QZJ4R2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feefd23d742cc69db1c520a5f70b4687a345b0f66d7b6a397a66d29425fc115. 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/QZJ4R2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57cd1d24c3e0661255f8bd49faf96eb1656cf5a5241807b853258ab4567b8d9. 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/QZJ4R2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc164897716737f3e366ff1dd849ef90b04b6f6a83242735b52688dfff5f0c6. 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/QZJ4R2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4455323773746f0bc3767e445367250c284b5caf6ba854e4952a40edc1bb38d. 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/QZJ4R2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f174e0660af352931212184c4cd4619f2ff8e042ed3d0c2146b31e9498e9b4. 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/QZJ4R2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad0b81f6e903cd9c1be5275b17ba976ffdfe684f0413707a8cc4481423bc66f. 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/QZJ4R2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1b116979efa247d3cc270e8386dd2aa94a7441b55d7207a1095c44fcd32ee8. 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/QZJ4R2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a51bde12318100f6d20b9c12ac769ad129769d2ae6b77da7cc2da33970091ef. 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/QZJ4R2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1b82697db3db7ff481d77010b6a556b045d28daec185f77b6cbf684032762f. 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/QZJ4R2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815952ef442d14587775fc11fddd9ac270dae89193b7604ad8d599e27563ef5b. 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/QZJ4R1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9370c1bd37dd4fc20d75b7f422aeab69e026f32457cd8fb05645e9b9cb6304. 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/QZJ4R1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73226c157b98dde3f6fc56d14eba0b94a349b5641100e320f374072b6da83cdb. 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/QZJ4R1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c914d5a391b66f2f61fd1679fb5007acc7c08324c9898daba346630d52989a4. 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/QZJ4R1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca56ca6537cc89595d330e6cf786beb34ba58a0214c49c6b7e6bcc1d4312cd65. 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/QZ9E41700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868b1e2d547c9660602aac97bf2eb3dc237cecf388666c9830ec8c34febc874b. 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/QZ9E41700011.