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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 0xa4334b554bcc6e2dd319e31dcd651a20579d8714b8820ba92c9b60c895663e1e. 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/0a151057-e673-4626-bc0e-2fce53dbe6d4.json and https://artists.proofprofile.net/proofs/artist/0a151057-e673-4626-bc0e-2fce53dbe6d4.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 0x4dbb3c9dc445a1afe357b5dd7eb3f03b53586c358978035d482979307458a9d0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ2YP2223201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc680bca1527703ee6f96409859eeb8ec688318d442be94da7a78eee4785dbf49. 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/QZ2YP2223202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8e77424d9b09f2ef8a4e0e763a4f65dc066bdb8a5a205a99b9911aec5a353a. 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/QZ2YP2223203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee928ffaf4410f4f4ca2ab15bcb6e26abfaf58c94a38c97ea63217b0588d3ec1. 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/QZ2YP2223204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6014ee75193812fa72648c49ac10aafe7272c60f94198277ca217088d57ff5b9. 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/QZ2YP2223205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cc13b5d7153ebbf67875aed45aad52cfd58d6355f1f96aaac503420a833a37. 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/QZ2YP2223206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520ab9f15f946ac4f6132932cb04c0f6d6416caf81d5e5a6ae9c79ca494f89b3. 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/QZ2YP2223207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaafdacf22f2c35553e8e0cef6cfc12a1cce78b3d5927d15c63f6fd802db5121. 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/QZ2YP2223208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922e03a8308ba6725df7964f373b73138a5c8e0dd1767bce50af10be7ae2dddc. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:26:25Z), 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/QZ2YP2223209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4244dd393d364b0fa5ab93b4fb2f758373605e6e1f325245c47110541ec0cbd3. 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/QZ2YP2223210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ca53af274d586761479974d4eab478ab7599fa8840f33215efb4543d9be3b0. 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/QZ2YP2223211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d7bc6f0f91695fe18176bbdfb91b104d0f79132cd23bab9ee1c8654d7b4be6. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:58:42Z), 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/QZ2YP2223212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7e86dee0368ac4e0e8dc29bf358c9aa3e9f0cf71ca6f4988e472ba80d434cf. 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/QZ2YP2223213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772fe7e8adc3daf2ab90200512c1912d926d88dc2859d83e9409761268ddc5e1. 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/QZ2YP2223214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3e2e1402a0f9130caac50a71a21aa59c33f6230c3325a360766e42eaa0c3c6. 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/QZ2YP2223215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe593105f005b43ebb4ea01a3ee4bde85e637f6274f07011928c37e3f9e214c. 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/QZ2YP1811701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d06f92818684255e05bec4b48a67cf37adc2d7bc28e16af5214ff2b3708b682. 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/QZ2YP1811702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a36a74538dec93305192ad29f083c35c0c618d9a397a65516e72a46372a0ac. 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/QZ2YP1811703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026519d6df596cda4e2180ed3ff0b17c3da2d427f027b0ebdf624ac2558778f8. 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/QZ2YP1811704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51620bcf8dffa8a611baca46359a9306bc1c6199a0d01c3a6b99d856fcfda4d7. 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/QZ2YP1811705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73990778724733aac65edfd4ff4dc46a412f454bc36b8a57a5c1a698eaa71d94. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZ2YP1811706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa042de5df745d4c80d2853482933d6df49efd9a968b62f651b42da007bc67391. 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/QZ2YP1811707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a8b67f163b49f0a69586d1f6078f4f100f2407ff3a9277dc0a54d95c1ea866. 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/QZ2YP1811708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb1908b89b9e208eacbb7dc4d80adc59c399c7d05ab286c303a6118cc11b05b. 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/GBHLW1903397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f02795b79096de0fde650eae96c1165a88d98042ff011d1f1a837cce042bd5. 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/GBHLW1903398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad86b30f995ebe2216645d552c02ab99f87beb96d57302f917a74573b79e093. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBHLW1903399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c0727ce62d292654cc73cdc5169f41a19ddbbabdf2d5ba68e7645722f94ec6. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/GBHLW1903400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd833f1010768ba0f2e0c092cca713a83da2e37c4e73f7fb86c8aba5bd7d055f. 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/GBHLW1903401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c94cf4cfd4f0ec02a74add609dc2bf2e04f662b348c7ed24bfec9bd8ecd3612. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GBHLW1903403.