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 0xa0b712b93e9f1fb5ce3668924e0e7b688a2ee7d7f63a6b62a67fe0ef605e62b1. 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/88745340-2bf8-4f65-93c6-e416b35c3cd9.json and https://artists.proofprofile.net/proofs/artist/88745340-2bf8-4f65-93c6-e416b35c3cd9.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 0x2528eac1ab38ad648218e726ced7cbd54d08b56ecceeb440136e7054cad0d288. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ4JJ1828317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9416a118af868aafd6adaad3c331c7ea456b33c25c6853a92a8c44f9b8b25618. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN91930402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c827e9091d79f7e18609172026c44f6bd181e216a5fa060a541d8c67a468a30. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZDA82169222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dd21c0731eddad3ed2b96e0abb54c32ff8ad4b11df6fbba1fa0ead75f505cc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:46:25Z), 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/QZHN62142142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff213fb094e97cc308c0053ad83d2adccaa096d403aa6c64475980c89b59c3c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEN2144427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df0ba5c01f40365220d7f0fef5dac8129c805a9309017e7492634274c08da99. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEN2170962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a066b80358433c7ce7dca78097281df6d50f6adeebeb4d79462fa8c2c32097d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:31:06Z), 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/QZNWP2250075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ca5b57eca6801bc63f5c5fc894c4de483887ed908c87b9b9bd82e6e44a2ce9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:06:10Z), 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/QZNWX2276898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafe5429a5fe749e91d1e775f1b1293908b93ed82a68b2eb585889b7aaa5c937. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6M2213500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ca5b57eca6801bc63f5c5fc894c4de483887ed908c87b9b9bd82e6e44a2ce9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:33:39Z), 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/QZNWX2276898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafe5429a5fe749e91d1e775f1b1293908b93ed82a68b2eb585889b7aaa5c937. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6M2213500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a066b80358433c7ce7dca78097281df6d50f6adeebeb4d79462fa8c2c32097d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:35:40Z), 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/QZNWP2250075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557f4136c52646ab92146dbcbfb2960ced4bf8456587bff53813827db134b95b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:37:29Z), 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/QM24S2301019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7c1d4fdb467f248876e4167dd17ef6d161aa1a2edde3f17be5901bb605e861. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM24S2300596.