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 0x4b5f33eaddb4628004dc97097ecd957fa8a85820df5d240440717b4dc662c2e2. 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/801b60dd-eedc-4dd4-ae71-3a5439a53e9c.json and https://artists.proofprofile.net/proofs/artist/801b60dd-eedc-4dd4-ae71-3a5439a53e9c.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 0xe9d24692a9dc3f33d40b60e7c49c56440b181cd26f56a8cbee1ccd0366ffdfc7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6F2475675.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94c0d77f3d8d40cb2273be2c0cf556ed9ebdbe1e545af1a2956d0a3f853aca6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZRP52471080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625af1ddb64e2c7fe17db37ae1357733f989ea96f9a985c8e908b19f05f441fa. 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/QZRP52471081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c76574e1f6ad548d27c434e1cc6a39e7b4eb2329cc515666238f1801d74721a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZRP52471084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db267f20859bd2c664ee46c87e4a77251a7744375ea742cccb2902adc6cec54. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZRP52471085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf4be77663306239b47901919210f6a44fee222401acfd4c6620cbffb227b7d. 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/QZRP52471089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4d17a41cdd8f2dacec25f0174a024bd3be560798ee910393cde583ceb6ba05. 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/QZWFJ2435734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4739b6e102b3a6f2f24be688ef5e73195ac2ee479ec65dc111df5b371cf0069d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFJ2435735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e9698c9c75163d83c688d84f4f867e65f7828101e6efd038f69e7530461454. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFJ2435736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61df8d7945bb3c3ab32c24c0e1d29cca52843c831c6635fdfec6f87b81ddf2f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFJ2435737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf43b7173c9d887e344d7ba5aa716e6c9c916cac14cc8ed519301ab2b89a3dd1. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZWFJ2435740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593dbf1c2407150ec7f45992b2342344bbb2bb3ab90ca214450c8e09770c7c36. 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/QZWFJ2435743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b391918affc52e5c995d39e423195241120bcba74c201a03bd0a4b51fd921b8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZZ7U2480620.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf033560f344c7596b311219cbdd90e266617d9cfad0201b62e526feee6f4c8dd. 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/QZZ7U2480621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dead1916e0cc0a370eb7a361893effebd2da53c404a97b325f3d2d8375fed9e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZZ7U2480622.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35840208a2a9b669337df1efbe1c925e0e8613e9c1cab5e0453c59856006e196. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ7U2480623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90406e3c2c1bcc0ae63320d420d32772fc29ae2e0ef6165ab993441585981592. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZZ7U2480627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ea2d02209429704025e5190b3c717f5e49496d005885e460964920576814d0. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QT3EZ2460932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b067442b18bb031500d1959703d5d6a117760f4ad1d471373ca48d791e77bcd. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZFYZ2561837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc60dc264cb9e7de5697e87e7b45f0367274b88c9fcde065dbe22f92a9020807. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDA82506103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb376fd506219dfa959904920d786fa8591a28dffc28af1ef668019a251645ad. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZDA82506104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8222e345ec560811f58a818799d4c6211a39b84329eaa5a611944a577e470dd0. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZDA82506107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1303425927623af2e1ef2b37c760dc5a6ba52d53d9357865b7e307d8e2738bab. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZDA82506108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be66a7cbd54d825285a9cdf407c250f8857be8f8d44d65d693842e22b4a2ee8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZDA82506110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aef96bdf384225f6046ac7a567438a9004f094f7a7a79c400a047ed9e5eb07. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA82506111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fcb4f4914434627fd95e643022461b32e8aaaf73e2446a94a78e1514b9c73b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZDA82506112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2959dadf51b7ec5ddacf7fca8f6bfc495fecbbe914c3f828453505afdc76204c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES62537414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c81a2d80d6a22bc781a022deb1f4117b0bdf579040b697bd2cf0bccfb01819. 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/QZES62537415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689067c3fb623c41a0f4e436ca941ebb93a8ca54d53732f25827fb3119e1b424. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZES62537417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4af713ee24d41ae1404bc24efb035b06360ccc51be0fe661e5fdfd9bf1f6ce8. 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/QZES62537418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ce9fe74e18f8c5d69234da566e2cc33908d74351fca48d7ff24b41bca331a4. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZES92562870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e158ed637abee735ad3a7a7f015313f7af097a4f338d0b71d495cee90589d2. 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/QZES92562872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf5e999366f64852ec983902b272fe235f43b8ce95fefe6d44ad703115b823d. 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/QZES92562873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced534963be552372a7afcf40747df2f0f5f599fe0e362ab99664dda2b9b8784. 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/QZES92562874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c71e53e6130858777b67c083992aff6f7cee8eb66ef376f4075cdccf140427. 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/QZES92562875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51165ca11de09577e07e84bfc6aaa881a821b46e6effb8762267c3b5cb5de14a. 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/QZES92562876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf0ad5e8efdae46a9db85f5ac73ba18d773fd08b819028011125b03ca848e1e. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZHN32536822.