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 0x5f4c52073634ccfddcf95f17cfa631662b7e26463cd9f76b2b8651daec9580c8. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6dea425-3652-43cd-a926-62e666fae75a.json and https://artists.proofprofile.net/proofs/artist/f6dea425-3652-43cd-a926-62e666fae75a.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 0x2982af8976d1711018e291903bfdcdbe1d565f846d511670ac312c250721c1f4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZFYZ2387915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4be3bcbfafebc12d5bdd489c80442fde716aa8ed144d0e6bdd1cce1bdf80be2. 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/QZK6N2238466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36061d564911f36dbf12ad7c8d204b44d69f00b7a1fd3e951bc2963d4a658b52. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZRP52238925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0eb3b1a6994a8c91022f29a819bdc2a9cd7c26fe394d05641326452d843bcc8. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZFYZ2387917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd538e0b1e608502b30766a93d0576df9172bab79af8d1ae9d76791b858dd2f. 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/QZFYZ2387919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c338a2f624b5b56aa2770dcee9bab8f9425d94c05ac0fb3a33672644dfef0b3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DETB41500469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490c09009955cdf51d25bad813dd8f7686cf890ad6c4fcca8034f4cf887fc163. 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/DETB41500470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daffd1a3ebbf93b931481d127d48848b4a951ac86bf978e3f870169bf3a8880. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/DETB41500471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8e65e6d9e83ca2a5f3e45a8500258b506824e0073739631e911b3359da1246. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DETB41500472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bf7cd3f3efde57f29511f975d6b00289d3a383e59ef1fa21cd361c4f1ace65. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DETB41500476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b8d9167caf5e24e535418a8c52f7061f9f17e4a51f8151c98a4bc9a9ee420c. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USA2P1502478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32238dcbf776509032e4e45c072f285acf2d288cd32328760a4c9cdc557297e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR10S1808177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dcb4ee4e3822809dd85a59a736a571dc8b0308271968e69c3f09c9c1a64ee0. 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/FR10S1808178.
Die Gesellschaft ist schuld, dass ich so bin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b17fd677d3b1cfb6f340f70155d284219843ed21ba46aa16f906490fa31185. 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/FR10S1808179.
Niemand beißt die Hand, die einen füttert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee3027dc1f46b4b644f2d51c0c8c533a8f11d580e7ddd9dffb35df9c1646bae. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR10S1808180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb66eb4abc316e00eeddef1dd22b13c68afeec95568ef6ede204f9979fa9b7f5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR10S1808181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba7a2c00d64028fad0e1d438a47b8bf3885cff3f61c6f0009e03dbb1e5c3603. 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/FR10S1808182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a75352d1dd3e115599126dda1e6f97bb200f0f49a009afd0866464b8b3ad639. 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/FR10S1808183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d59a4e8056b69f8b01fb32d3300fe0691a0bb2ede215966a26e04e22623d2cd. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR10S1808184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50986be4030f743262d8cec17b8ec87f4647f77a55ac7089d0ab61d90affb4a0. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR10S1808186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19070168a5e0148907f07b30a8e04e5f7c85d3e9f316d42b24486bdc42ebc7c0. 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/FR10S1808187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aabecdddeeb3bafc126e232abdfbc929d3bd3fad8f345dca3f7da1817b9091. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR10S1808188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc37702f9e42d41fee50cf8aa76addd3aa424c61a73fad2ada37d5347abad46. 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/FR10S1808189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07372388379e4e8c91cd4695ac0baf8c8a907e46c14413e337cd70946695ae39. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR10S1808190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdde450fc6524eaaa9945d61dc6e49fcc028f8c2e1276283a90154e6f26d75f. 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/FR10S1808192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ed91e11181cd60bad5c1d728649e1f4b4dc6bbd63e259f1cf0ed3a1f9a17b3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR10S1808193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23566fba4b2118d584ffe281ca86f80033ab4fbb8d018f211ed03d3245db2e1e. 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/FR10S1808194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415e233d42056bcd84b728b53a603829ef16025ae82b3e73e87060bb4d9ee29e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR10S1808195.