A3, A03 or A.III may refer to: A3 paper, a paper size defined by ISO 216 Biology A3 regulatory sequence, a sequence for the insulin gene Adenosine A3 receptor, a human gene Annexin A3, a human
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 0x5f5d05774410e1c808653863114bf1dfef978cde9b7705d505751279bcefd92c. 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/ffbf96df-81b9-4434-b057-dca0c3ce32af.json and https://artists.proofprofile.net/proofs/artist/ffbf96df-81b9-4434-b057-dca0c3ce32af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wilde Westen Presenteert: Welkom In West 2
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 0xcb628207a4db004102fc409fb273eded1e5613703094fc7062ef33bddffd7adf. 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/NLFX52300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96596828a586404e55a2fe80c89a2317e9aa28cc88e0966bd4ccf6cb4d5c89e4. 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/NLFX52300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1b5ea661eb33b80637fc8f7d0455f3499dba79523b31557f4331b12c0f0b24. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLFX52300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf162d88285a0dea40cc3579da5b56b03148e3965e650854dedfc754101238491. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLFX52300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ba6de9cb643bf2f40ef33388018e3a71e40d16dd65b16f5d0df300643d6571. 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/NLFX52300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194585770a6884b75884052c2308ea2271566661c5fa5288c1cfa319ab53b20d. 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/NLFX52300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c0e60fa459ee9e0ab2d0a52d83201b204674a8fa616d22c74f8b58e8b8b29d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLFX52300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ada849f87c1ed1c49f763549b9eb424f782e323246f6c910d4a52c3907bdb79. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLFX52300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64227548955aafabf06b151c38d8f6f53e5239ffb52a93af1043608f63ccb055. 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/NLFX52300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b50b56aeb9a9d60e64ae065669bed0fe823f357102d682258de00c2f9167a3d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLFX52300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044fb0ca5ba900bd958a5f84ad47a49c88b70cd0db08fc48cbdcb76764573e1f. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLFX52300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b204ac710f2d31ad4176d86f369cafc87511a492d865a837130ffc66d0692c8. 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/NLFX52300014.
Wilde Westen Presenteert: Welkom In West
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe709d9e61428ce8afbc034608b77d9335d13ef83b8eac63bd98524b26ece97c4. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/NLFX52200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e152633884894e852074bce90a0ba667dd2d0af8e27d27e25a29a6b5e94242c. 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/NLFX52200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b6c023c3485a17cd4d7c66c563c678d7efd6baa131ee20571249eaa9604193. 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/NLFX52200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f42ae968e30e78d333b76bbb42ea6b963dad90480e1fc55529e18c712b16836. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/NLFX52200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677574d51e1c945ffe18777d01ebbb89a86123943a2d4471e91cefc441a3afde. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLFX52200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f32cf8b7ae460d62aba32308170165b7207c12ddd3a9841874788ba26f5ec1. 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/NLFX52200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ea1ac8e3132614cdbe6e6a6b57096c5a6ac13fe55ec073d7cd30ee3679ecb2. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLFX52200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e06ceefff798943bcee8eb729c5820e23e3c145bd9c4f1458d86335439203ec. 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/NLFX52200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7da063dc7b6816dc8b5a922ed9384985ef520d5829990e793a6cee2309a616f. 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/NLFX52200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796652ae446af2148d3181548c8e15a5cb0eb8c2141c14833381a8a6b04e34ec. 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/NLFX52200006.