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 0x39f91fd1dc04b5402ce2b18a24582e979edba38cd5cde99607e9ec8dafc1fd84. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20cb8f41-4618-4611-9269-46fa01a0ad32.json and https://artists.proofprofile.net/proofs/artist/20cb8f41-4618-4611-9269-46fa01a0ad32.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 0xb18994e886dbfc9f3be5e45d37d16f88dd60c8b47f3a536cd0333d69ebe1665c. 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/FR10S2193906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff8fc036e5a1915771dcca72423f42ec0ca062a7e58baf9c5edf1d307967473. 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/FR10S2193907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae27832242379500eb91a4cf95a5bbdb41dfe356f47e6697fdd23bf8bd51abf. 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/FR10S2193908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205912b74825286bdfcd308cfa1fbef60fe15c059d5eb8621120641d67df6db6. 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/FR10S2193909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc702c403dc99a950b002b3c1c4c67cb8f4e3ff9883cd4f6386389583a15b9ac. 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/FR10S2138981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e38144ee7caf759231985a8c68c1897e6181fb33062e6c393d74095f2a371e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH6541675486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eb9ce7f52a98e00db46db05f2710e921e9017f877299cfdb87dfbcbafbbb31. 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/FR10S2193913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a45a8da78029f072dc09bb1627eb968135e8b7a17dad5222b13286f95305c27. 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/QZK6J2056923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160a70ca55b5ecac010ba4c9df9453c6f110e5a75b0798bf42829df7a015eaee. 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/CH6542237299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535b6febcb1f999911b1b966f0ff2d115f73735d80be2e023a004bf5efde7b26. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6H2393556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f3e47932bb0987553ab802cf3528bfb70694dc3688eec4a7fd13c2dc7a4c8e. 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/QZK6H2393557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2ccbcdac0a4476897b413e2e59a12d7fac017b610e37e4c07dc1828577d2a0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6H2393558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c9557e38a761acb0e3b051c0f00111d54813659f2416a110ecb8c181c448c5. 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/QZK6H2393559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eeb4ba91fe2d5ddc73b984d3e4cb8ff61d2956530d31fcb7ff6948ca5a8b3eb. 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/QZK6H2393560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18e1220891e9820f7b3578261afc83a00d12a3c8fc8f36a705f6e2f507ee7d6. 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/QZK6H2393561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1c5d050831e1c648a3d18faa6b29c3dfc4fea90dcf7b289b263b838264ccf4. 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/QZK6P2343448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4929be669fedb5e8d8159fff3fb476bb7d361419e47d1cc63e7874b7620e0434. 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/QZK6H2393563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff145b222a585a6dfc13a5be45b35b5b7c16940381366deb6b600f4e6a3f3065. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6H2393564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6990cb972fe7407adaa2bf3769fb0b1d1da93e373b9ec5517b1517327db6a272. 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/QM4TX2260562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9445a9ca7a373f46f1e400e92dd2209b327d3eaec359e27159054fc015440a76. 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/FRS182161792.