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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42124511bf6a26d84642b06dcf34129bae81fd8e3113a78b053a1b40dfd70b87. 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/70033c58-5969-400e-8b5a-4ee56c39d5bb.json and https://artists.proofprofile.net/proofs/artist/70033c58-5969-400e-8b5a-4ee56c39d5bb.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 0x2125e0ede06761754e7c0268cb99616386ea0e53401eeceb2f1cb13cab9b57b2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72185585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5d9f8f2cc5e6dadcfe1a01f86fd61f103b0c82dea41e7db39236039dcd4582. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZHNB2142748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf015b3328bce5c74974a8617af4309f08c81cec671cb69589e7216ada1cdfa93. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN52290840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dac1d4752627407c74466d6ea83a555aac44a91ab28fc890b249cbcb9e2df2e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFYX2379183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1114291c8cb7188e4fb1b084727980754e31c44cee8f308bc65ddf5b36f25b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWY2242384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb521db5380db4d93b8ca120f26c8bba4d30ef41bcc83e0bdc86a4bbe237042. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZFYX2379184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726aa688937d31bfb135c6ef51e89fc0be8c3eb6a9e7822ef79765ef4cba796b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWQ2492901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4a03b0bca79e19a0b0a03d3c70eeb046a9aeaf1e6d0ef05903dca21605b646. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZDA82463379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fa9a1988ed9b1ef84295fd20a9b85aaf3dd9a3dcc26f9e5b6a92315b2f7eeb. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZK6L2427853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b10ef8c64d2da2cfd3697e179120aa16cce9e58878adeb0c2351acabdae18f0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZRP52470626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1940c01abcca478d8002688a010157fd4d962a2879e2c1d654f327d2ca7e5aa5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA42480528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d408f1ed4f58db2879aadad5c7bbafded8c7b5375a923fb3c387f51494d8e40. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZRP52470629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69413e4f619676c98e408223de73bdb64d377182f0812af9f9cb021a83f59561. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:32:33Z), 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/QZTLA2575636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324f8748e5776a4bbe83ac33ec5a88ce8645c4af39082dd6b85c2802cfe99b30. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTLA2534524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10476334d01ca23b9e6f48e7c02989d50e598c8dbb32da58695d0674e842861e. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:53:15Z), 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/QZTLA2596961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3c564a5ba8240bc57f1bb8a4405eb6d37c4bf06427dd4b74b47114e143b0b4. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:08:32Z), 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/QZQAY2599732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2568906d82364c36abcebe8573613735b346c3d532094fbe5063ba6c10853fc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:32:03Z), 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/QZTLA2529234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77ab6d38e3624165546bca7d5f093ab767ecf4b35126ce16c926fb93bd39f94. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTLA2514463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe301e73a9a966a6314fb97664d00ebb88bad4b49438d6f9ec49dffed52c8b466. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTLA2588761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfcbfb1da68a319129f6c6438bff5e2d62f715bfe7552ca744852362856eeff. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZTLA2532209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5496f1038fbea2db50ecc47fea5213008d3b09276a31ad78907e1a2cf9e8a0. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZQAY2548072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e324b97b40d12f891e105bea689a95fc1907459f05d2cf5e338fe28831296d5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTLA2587806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3a12e85c14185505459672febd5fe6bfdadb5775edb3448e3a807a28cb5893. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTLA2595722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad861cf2efd3381bf81a599262c73f9cc2716348d260f717b8de4b8e1db504c0. 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/QZS7J2278954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671e50488d6a82987eb22843c7a490827d884cb21a6c6f9a2778dffb22b4cb95. 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/QZTB92455938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2951078d5dd59aa90cebf859ac83ff8430cd6e9b547802636f46483b6d880b5. 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/QZFZ32463099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4787932b5c853a50e569d30fe1ec7b0c8bf65e52e0b5cdcd386ee42bb61d6529. 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/QZWFX2428652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e58dfaff6e34c5c253922a19e62ab439154a932ec81f997e6bf93eae3a682eb. 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/QZTB22324824.