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 0x64b0917b04839c181d75d393a5c0555a9e63505d7f133c0a8352ae57c4b41760. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5376d7ef-5c14-40d1-b9da-6d832650e349.json and https://artists.proofprofile.net/proofs/artist/5376d7ef-5c14-40d1-b9da-6d832650e349.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 0xa29128032f904f21b6a1956bb9291ae980b1be10dd79cd915bad7a1bfbe1cedb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:36:52Z), 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/NOCEQ0401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c218366873ce4fe373db542ae5d16b8a2da44662a12dc2b02b5d72834d65b6. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/NOCEQ0401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe33708abd47e587d24ca1ddba8b20e08c955ca03dc8644e4dc79b75232317a7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:23Z), 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/NOCEQ0401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844687bb8ba2abcb7fa3294d0bb8a790c3fee741967a404d7c2cdacbb1d11b18. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NOCEQ0701010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfadf6a10f55b5ac473a8652a3f24388fd675b6af932d7195e968694e250c97. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:23Z), 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/NOCEQ0701020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd367c427be0966d7a9ef0d75c8e215b599560bf747f2c9f8999ce3eb6252b6c8. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/NOCEQ0701040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6655478e7fb58a9ad4e0b19b3088eac66cc8ac197af589d38fa6a01274558e6a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOEGF0701010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08ee74b880070d2feedb642ee1e8fd2f39d4036712c6baf0a363f982ef08e76. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NOCEQ0701100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6347aa83010a359869d8e3b44486e01114a1841845f77fe394e97486e22fad8b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NOCEQ1101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54595d21cbf5f3855f516c66d98c4d914a062e46679d0a68fa70cca0164f68d2. 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/NOCEQ1101050.