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 0xe6e138dfd4989b376876032e70dbb2d9284317a1048d17ac227bc16fd00c6af1. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba088619-401f-44d7-9a2c-03d9119221f1.json and https://artists.proofprofile.net/proofs/artist/ba088619-401f-44d7-9a2c-03d9119221f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x39e5ed0ca82119ea757dd5d79a1f027543df399329fdade503e28cda7d71dade. 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/ESA011816403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eb0b78ece00d6875b4845671bd070b0376c84febd256d1f4c3290bad96a4f9. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ESA011816404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdfcc5d5615f9ef48563ec07e07cd7e0a585861d1fe39ae24c82720e2f68a4c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ESA011816405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6514bebd475abc8482b79c664ae6926373bfe0125ada500252a754c219b195. 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/ESA011816406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e87dcc80fd011f620e6f610659176ba353f9c906a3638fd85f8373b3e82b7f. 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/ESA011816407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedf7011594a1b5f1783a5083662bc2f80c7ddb1bce550aeaa0ed489b9cc85b8. 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/ESA011816408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8b97877ad4308d3326a4c4e1bc1b471e88865e89b319255939f92e107aeadc. 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/ESA011816409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acf825df44dff121325b80d73c229da1ad081b71ed43dd6fbb29118598e9663. 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/ESA011816410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be9bb9722abc9e05df7a8f8f178578990e612ff6f013baa3ad13dab1b4fd0a3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESA011816411.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2342666f21b7e834e0b1d1183dbf15f84a09449af6e032594d400ae5763fd4. 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/ESA011816412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08449c0378119940ea3e5f718ad57bf3ab15190aac479321f18c09fee4a6f9b7. 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/ESA011816413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a47f2a48b254048e46f526be94db6bdce1b0dc94f5ca1dcc00d2156e0ffcfb. 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/ESA011816414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f622358aaa71cc297e848972822bc6eb86e4e0e4e09789a3b215b5dc722878. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ESA011816415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1a3a7bb607cdf02f3fcd85319f5357e7f0d1c9d935d6b6f0f931fb60a46e0b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ESA011806531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8556f54d0f9c709d5e6070c1c3dabb2ba287c3671349af4282a65d5feb2d9cdf. 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/ESA011806532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917b1f2fb4bb79f3e4acb70595b25e342c74912b64b8627a8d4406788963847a. 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/ESA011806533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54373d59ace39a58e8bd091333474cf57323d6665ee72ee371930c5bc5b8eff. 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/ESA011806534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4397f15ded0e57df63cc554852bb3e18b37e6ac33fed7934838ea5d9e66ffc03. 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/ESA011806535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b064ad5272e25ff0832690accc611993389ebfabca1f4c9301ad9f64dfd080. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ESA011806536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956e27956aa7d78f0d789a7728cd3b3e0b5b3e20e2ce12bf57d2f8e45de521ed. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ESA011806537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6454b46c1c2348bf101d5c02adb89c6f808ac2195e22c76f75d483f85f18d0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USCGH2138933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412cec5ecf0e4497fb67c8ec56745f0b9a58f1d78af2c0f7b90029dd6911ade2. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USL4R1910769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc050b59177e3dfef5751b2578bcb138f150f2954ca2afad096615acb2e34274. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USL4Q1724921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21433a22ae181ee9d57d299e6dd94557db705fa944ba4d4100a3b3c0112aa223. 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/USL4Q1724922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf94e4b8ca4c5fece8ef81710bfb356fb5393d9da53cd231b6daadb8e5b152e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USL4Q1724923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd282aa260a03d5f54c143d494340e49f98acebfe6f678f680a79ea889707f5. 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/USL4Q1724924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f9b10fa28844c2e8cb5495da74b6d8c73173a04cbd16d60fdb15b00c6b16c1. 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/USL4Q1724925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b2ffd1299b5f86c8475ec06ecf9aa655f863c7fb769e49df91fa50f4db6d04. 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/USHM81749643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1979eaee3ace63d3b823977a9c989d9e52908008709bd158c29281f41855d3ab. 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/USHM81749644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6222406ee65860945daf27953e8040b9fe2d5dce59bb20e28e168acb7c5b8cb. 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/USHM81749645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35a84f081b61bf6b188a48f1e71b998d6673ccd595cd8d9040eca737ef56760. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM81749646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf20d69f757b19b267b4a543a9cf8b35c8b4c67eb1a1026998abed46f68e620. 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/USHM81749647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd451f0a0654f86e5b8e387d6cc24f231ddb89066a272365f8cb0633c62f5b1ba. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USHM81749648.