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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb729dbf40d852963ab6ac8039a1322b0a83bda00d9977cb868cbf6d05156ac13. 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/54abacf3-b4f4-43b0-bc83-a9ace51445dc.json and https://artists.proofprofile.net/proofs/artist/54abacf3-b4f4-43b0-bc83-a9ace51445dc.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a99f62c931dedf6c3772f6828c48a430960dba5e710e6abc19260f91a793267. 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/CA5KR2367224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9d3ca3bffcab6b6c921ecb77197acc5a55b41825d787842ac79e5a7557594c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2010815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe57d2b77b5403ea017e02aa869fd57902ea40f9a09fd5319d1734f5eb110cce. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2015091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca703c48fb16565321482dd933725782e20e8ff31cf6577c836c105159b2572. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL2017652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971e8f59e9ab3c6bb4600b040ea5ab391f1b358003299f23e413aa988c4a6d73. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKPL2021579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f167448e7f89f79db32a3116a1c615e0f0ac0b8521f2e9249445cb92523d69c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKPL2024941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a7162045013ffedaa8033a190e2383ff537bbefb40c13b1f1e10f28f27dc06. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKPL2027233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6570cd361da3abeff541081c197a24550b0358cf19f446cd920b53ecd5e64b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL2031039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cae8407ec69db1edfb74e96a723753844cd3f252406628a66530705085f64f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKPL2033473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5ed0922985a65d941f94e1697926877be6c4da5f5ff67d1f331a0d022651c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKPL2141160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae2e355b9ac03dda6d9c14784969966e1711401f75b20bb24f3589b052ae255. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNB2229579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d527d117a4f942a485e5cf05ea72a498f1caa8616b4be594665170001b0dcbb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKPL2141314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36835b7d323c51af11c8df36f000b0291c9dcfa315d3884cca8aad2754e6d0cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ41976856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc358cfbfe82bf9488efff8497e513244ddeab61786e0ea8dc13c2cbac1efa3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADY1835836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8259d350671ce70a179dd169f1ccb640ce5d354ecf138bbe59c8dbebd3ce850e. 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/USL2N1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d873f7c7644b4f2c1c9f1201a9607ee6670f275b47b4e666c96404cd51d3f4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA62277973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c29bf1066b3ab1390929b0573a8fa107856e371011ea9453406463184df6b0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMEZE1946205.