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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 0xc83df01faee69bab146478dfe97a55588519458d4dacc900811e931957e24764. 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/2f0cfba5-683c-46f9-bd1b-cb710d6b4786.json and https://artists.proofprofile.net/proofs/artist/2f0cfba5-683c-46f9-bd1b-cb710d6b4786.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Let's Play Russian Roulette, But Only Aim At Me
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 0x62befadcc1aa894aa52901ba6d89eba9d7f22ecbe3ce349295a27fa4f7a7e87d. 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/QZHN82141713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c75e1ef5c12024b5a0024863f9f150dc18a4955313bd5ec12cb3906950cac9d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWW2125023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4ec58a446b37bd1d3187389dd7e4157d1947c19fb0bc83799c991ee5755032. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZHN72260485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf081d9b7d75f99503d40407259f96f7dfade27598695fa441b2124c0d2e328d6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEQ2279784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efc8936e42e5273b8cafec7f1dfdb1456c7cd278f8be3e4b0bace538c5e6c73. 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/QZNWT2298689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1823c07f37ef26729a2a0850750ae7ead1729ca043dc712ac93ce39ace797011. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZTB92284873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c740ae1d77ff6c23ecacd4f65262b5c19bab1a1b2d22f34710a20473ff77bb. 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/QZES52214255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873735696d87e14c8b6c867001f3f1a407d221fd2a9281abf9c40629ac2add84. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZES52214256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c56df7af4f6de72d22d87e4de06caf128a5deaa8d2400be52db589e484529e2. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZTB92284874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664736428380016dc25d43606a4b92e5d39161b73853c7e60d698abd7cfe4b76. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA82389688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d30fb83aa06b32f7a12d4fd122ed1dc180f76ab4855f4f813c0471315ee9d01. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN32358632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8784932f13998b3a139ea5a6632d84bc271c3ede7429f9ee599494d2280a5367. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6G2318446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406d21b981635c17b95ef523392dc0f0e8ab2cc06a2b6115f59b702ea10a3f2c. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZNWR2326451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1f18d3602a747c879c5f8af45c2e9ba522b2497567f3006f94dcc906f72553. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTAU2320137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1895fd2ae2af31dbe8b328d9dd2bf555f670ebbf43872e5e85d17f34b043173b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZVEM2381566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f40e2bc68a19bbdbd472c772fdc57767a17516df6d5e3e8e12c7ca2e88adb0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZVEM2394384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb357764c40e2e20623bc3755fb06abc3d9ee393601526cd4f976150a0ccbfab2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZVEM2394385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd3393e7e34cf8e31b08acf00907a32debe5c835c7f29a562fff1b656db7e81. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZPEW2454394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4804cbbffc1c83c6dbebbbe1a2e31a8a934107545d7c272e6ca32ff330b1af9. 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/QZPEW2421969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd645043982b59d8d27a114b0161fb3b73234ce14423e60b0569c61241d18009f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZPEW2403634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba2f4dcbb27525c5fa4a35cd5947e07a960ec46c2e1ba2b3554994b6e77e19d. 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/QZVEM2394386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13346d3e5cd47b439bc95f8cb3bfe082b0f4d2e7840826d9b404e8a335f100a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TLVEM2403630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49afa075ed6d7b355e0030bdd398e461f363594b9ef7d1e1dad40b6333dbbee9. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/TLVEM2403631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fe4f1af62b23310dccce3e82425e4a9051cf4f9a3f9f01083c6f0d6b61f312. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZVEM1863141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaefb16d8ab018109c2afb67152162c32e33ae9c316ea2e7286d0390d888a555. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZVEM1863143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c43ee5fb138448c5ade74932544f034c1eadabb861aebe9efdc734159a8d4b8. 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/QZPEW2517550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d0f2c0de4f7ac068fdd6a0126388a3da29119d355945b44e1aa409fd27660d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT4K42583894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14578d93828191b90555fb9a2a2af40e324cf2943e996ceca9838c545b852830. 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/QZNWQ2279814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b63e21e22cd6b7dd7aeeac3fa1870a00cf21f8199f7f570b126a703bea26d5. 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/USA2P2121716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1c866215a5cf327b10f667e1a9526431bd5c6464b5d70285b1d99664caabca. 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/QZMER2232495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94a9a3ff0881d17525ec2ea188cb48714c1dfdb10f3e6512b9300c906927258. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZDA82554575.