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 0x0f90366a6384f046d27cba0ce09b2f5daea017c3f285917e7a1f83c65b682f3e. 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/9cb7ecf1-e40b-4b89-9e36-96a73e32e54b.json and https://artists.proofprofile.net/proofs/artist/9cb7ecf1-e40b-4b89-9e36-96a73e32e54b.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 0x544781b57cd8bf458defe468e75695fdd552befc26ac970a57a1622ba8f8bba7. 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/QZDA72593086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ceaff394eeac8fe7a2d8077ffe84990256f3a70559f742659f7789a637c0c4. 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/QZFYX2506918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb450a20f020f21d5059ebbd233fb0b43702fd0ccb36e80b073ffe5f8a9fa67d8. 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/QT3F42442385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43195778e167abcb9457c9e4ab5651a6b1df61b004fb2ecefdf2341e04a11515. 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/QT3F42440453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f47e4d8b6fd5fb6212460338ad3c8d9d88408add99c18b9654e8eee406a0ae. 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/QZFYX2502801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75884f6f431f22b2a1e36926a7b2b4a9d66c3eb8e0435a6f2d38b866286e265f. 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/QT3F42440450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ffe612471700b828695abf017d942c7b690384cc5e631be43c6cfba0a552fe. Chain 2 (Bitcoin): anchored in block 957233 (2026-07-08T23:07:54Z), 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/QT3F42438761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0275d9f590b2e71355658abd026e6a5c0925abd83e70a20416b7a8c71d43b85. 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/QT3F42440448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32265adee9e46ae1f3316be2d831ba11ba0cc3219c7dd0821bee54c5ad59a793. 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/QT3F42438681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444df2622224af059c7648f2bc15500be08cae980e4c8c3302d3735706a75531. 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/QZZ7M2411729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a13876fd94c326c45493bce863d9c8f1a7210b5607bd6eaf72dc95037ed26e5. 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/QZWFJ2470526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fe9cb7c3bf5b21c4f35af6f072d1ef718e7d2581d0896cc17487af34c53b6b. 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/QZTAZ2463582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4697d8d34aa2556197710709ee6c1355b18487a63fdff6c4edb3d98abb0fe6. 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/QZNWR2495140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11a561d15c11a9328e106ce0af548854c8dd5018eef21008518701874644f6e. 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/QZK6J2455394.