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 0xe6d5cdbb49b3d9d3282952d45abbbf8b06a410f04a9db88b5f3c8d846a9108c3. 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/fb91fd5d-1cfa-4df0-baa4-543b5a9e0a39.json and https://artists.proofprofile.net/proofs/artist/fb91fd5d-1cfa-4df0-baa4-543b5a9e0a39.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9986dadf04f1c38c177045a956b0de3a75c029f5ff58e25f15dd5d361d40849. 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/ESA112313424.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1569b5d332b857e305346976fe39b3e78b53f885fe562432d6c6eaa1202e3bf9. 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/QZMZ92490370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d993fa7893dafb80834e15e9c2ff911fa3e0a74c0aaba28148f7bf9c5a34de. 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/BC3PG2401616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cbb9635dcb77d1f7540cff36627aa83750736b5b3d0bb2fe6e1cc28f5cbed5. 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/ESA112431374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce39122c68fd73fa807186d786b3055bd9ee7191b55612a80ba4b69f8f4a653. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/ESA112314404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde9a36402b3966cf4db9310689619ba6bf0ba671411e7f920baf5ee0934d350. 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/QZMZ92573290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac640d51bb115b318f171e4d09b63bf46d4b574b74aa45c2313f951c05a033dd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:10:26Z), 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/QZMZ92554538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e8760cb599ddd7f6b2b2db0c2c2c3a5b233b5201e0d49a1bbe9951ce9d1f2e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AEA3A2531472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaede791d994f26ad64c6bad8f94a9841afd8a450e9e80a211edb0b89b3a0d4fa. 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/QZNJW2529314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92c79f1b7dfd2b5dba66e51470806f2e694bb0951982bbd19bd7fa47cd00337. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMZ92554540.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b903da420d9679aac3d2da83375470908344522bc960f19801f8c78182ba770. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJV2541265.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfcc9018ed7b383714ae2b43dd6e9b59ea919e353350de8385258608d3872f8. 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/BRKO12500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf611a6ed1bb24315ee51e5959f430fa24aed1f0b027a9446a696d73635c18cbf. 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/BKWCM2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a4fb7d8dacb19c5a5394fd4638d39981f4893b9886f214e885f3341f758f24. 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/BKWCM2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f57a662d989d19206d8b70571402cad2a5937b1ba1175fcba48236f185b2706. 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/BKWCM2500019.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ef513a12fa7649a9220adc25b08864b3f7aa30c77a9c6ec3afbd540cb84a83. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BC3PG2500375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20cbd488e41ceb73bcb97ba28a72e3832a4fb2ec28307f4126dab3164829a03. 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/BC3PG2500003.