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 0x56406cf120a752ee370b801e467cf99b896f9ee946532a3d992e7b97b90535ff. 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/bd241d9a-037c-4a95-8218-0758ff1495d6.json and https://artists.proofprofile.net/proofs/artist/bd241d9a-037c-4a95-8218-0758ff1495d6.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 0x637dcbd4943b6016af67fcb39d5a27b88ef478963497c591449b92c66f59a9e0. 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/QM6DC1879526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e02568423eb535666440c5cb939570fcfd4f4048eedc5830182f131c543e85. 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/QM6DC1879528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e70a9ffacd78835a26d6f37b94af5951c27531ed20b931739328cafc90f97b9. 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/QM6DC1879529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061b931740693909e0246f2b8efeb0dd9435d106c13ef5fa2ca4ac75230a4100. 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/QM6DC1879530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21150979f0743511868beef83c290223eacd472bc428da342fad90eecfc4a5ab. 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/QM6DC1879531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7bb7472f1d72e7f29fd6aa0ec3b3207af6d772caf229ad38ccac1f8af12bcb. 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/MX1771100274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66540eecc86b66c23f9fdd238ecc14d47fc5ef38c0d48c55fe3bb4d61cab7c80. 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/MX1771100278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e41970827ca31015155e6b7adec51e67325b91896f18a683e7c1a08684e4fbb. 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/MX1771100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70d91b32123d769ef49959ceb1ae0bc46a5fa9b34d1d457c525da3d16f2bb6f. 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/MX1771100283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e71cedd41c5bde54134c8c1977d0377281afc2bd8caf53bc20ac94d563dc16. 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/MX1770900128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f790b7ffa2f62487e46fc46ffa9028a17711e2e3999c5714ffbe88dc408e516. 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/MX1770900138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f6c8a860b458f57b3a2615929f685265af4dd2beddbac433f6130c5b5feaa7. 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/QZNWY2397855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e8d172b5d7b34ab61b3c4cda87b958ecd77aebb87248cdab4dc39f4cfc7d00. 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/QZNWW2364625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe113f3996ba4a53d4ec09f4253371e2858addc0b26f31cd7a4347c1638753dd5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:36:57Z), 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/QZ5AB2363901.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2c1b342ca6161a23a579d8ca422d8c561229bb713eaa86c933f26665c683aa. 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/QZ5AB2363906.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6505748433b34085b3db066859431f6eae5c30ad3585c7c8310e98f48ca5c4c2. 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/QZW9L2292024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57d7bdeadf23c2aeae73564cb0dc1ac13de38af34f2be271dd509c13f6284dd. 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/QZW9L2222231.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadce23214a967721a6945720dd92fb93a99edc8b08caecf2c2f64ca7bbfd950. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:54:53Z), 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/QZNJY2280567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1ade2bf6fe84a36b66f200265eacf23e083eea1be374087e3c041bdfbcc2f3. 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/QZNJX2232170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd036ce4652340ac5dac7a905c881c57354c621d1d20d8650c74880a9a521e7e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:15Z), 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/QZDQH2254194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207aa19302d8934ea6b4e77f5d33d559f03c29596c04bc48f6afc68c45c2a5e2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZDQH2253751.
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