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 0x698d0a4d7aff0de6efe10d520ffe48cd9598c9369e9b4328f922c97c32882384. 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/5cb1e673-310c-425a-ae37-c140c586b5b5.json and https://artists.proofprofile.net/proofs/artist/5cb1e673-310c-425a-ae37-c140c586b5b5.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 0x6171592a4b827fd5b17ccacabaa010ec280844122ce48f8d91ce3e4a54edea23. 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/QZTAU2157898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3034375ed93a8bf0cc74d1fc69ac24975a7035f51e9f3db58e47316941d9d4d2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZK6F2131835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a2c52e9b7f94e2cf633c39fe176f20145c2bd0e3720fee23242cc40b1d2cd1. 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/QZTAU2157903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef099e0e929bd2541c1bd87f8c8c8786570df36b86a64beec918f750589ebca. 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/QZTAU2157905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130ba6282113cfc786878834f9407e06f7821140d4cccaf5578e7a2dc98de3f5. 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/QZTAU2157906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7b44fb0e0f75a1dc5b6fe1563a6e61fece6f0d9777184c984c9b24a1c78d7b. 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/ESA092206139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7b44fb0e0f75a1dc5b6fe1563a6e61fece6f0d9777184c984c9b24a1c78d7b. 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/ESA092206139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86debc6c45f0bbb3372c90e92d1c5e4faa91c5354264ddd08b556be5f630c4f9. 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/QZK6F2206389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e3232edca9f0dfc9db72ff6d87b0f5dfa275e7f0eae7c84d3f1ac216a2950e. 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/QZK6F2206390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c6647b68f46ac7b127547633780c763166d105075fbafa6c4757bcf8b1cdac. 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/QZK6F2206391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0146820f0ee70b127d980d5869149368bb68b5f4582c1259ee32f2da0faa91. 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/QZK6F2206392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036830cbde80d2b2b64f4e96983515f285d69c37a78cf9ee92d58227a246bf87. 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/QZHNB2239208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1492dcb1779b71d741b8fa88ac79c5379fbbd4fcd19c8afab44883a8e9d556c. 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/ESA092206373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1fffccb49944a7381a7207fef14c1304482e079c287dc246183a3b12ba6fef. 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/QM4TW2312790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036830cbde80d2b2b64f4e96983515f285d69c37a78cf9ee92d58227a246bf87. 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/QZHNB2239208.