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 0x61eaefd2be5793f9848c6db7c13ad1c5e88f0aa6a873ba0632e5c8a609c8dcf3. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52ef339b-2d9d-4260-90a5-ab82912b1f4e.json and https://artists.proofprofile.net/proofs/artist/52ef339b-2d9d-4260-90a5-ab82912b1f4e.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 0x69f648096fcb480e977aa525186b4cfae5acebc9271172ac2d4ce3b80fb12f57. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPQ2156277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27fa8e2f92ff3c61f48631cb50a28b7098f16b0d57ecdfb44aecaeb920f5fc1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPR2235425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bef2576481a481140b76bfae6afe53b88c55b2d83c78d5c0609d413fcbcb4f9. 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/TCJPR2273982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4fa3b209396cf2c1e46f8eb648a5584735885119e82a60871cee24f8c8c856. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPY2320127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302ccf18c230c71910093843416a39efdbb3406d0b0c25943b782e0be9b850da. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/JP92U2400745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03811f5a4fb86a7096ce042459f8b0a87d640260027f39bd5a30a1b4fef73a6e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JP92U2400750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61c359b92fff61846e3ad7651a7f4094baac2be8e722323ff85afb9d685945b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/JP92U2400755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302ccf18c230c71910093843416a39efdbb3406d0b0c25943b782e0be9b850da. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JP92U2400745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03811f5a4fb86a7096ce042459f8b0a87d640260027f39bd5a30a1b4fef73a6e. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:52:59Z), 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/JP92U2400750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3151650dc0bacbe61eec3fd1ee60cd3b4b16f32a87c67d6a497525867a1fb4d7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:39:18Z), 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/TCJPE2543699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb54690c87536de9a7595cae0aa07ef8fd4986c39ca1ada6a67db28d05ae163c. 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/JPA652400019.