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 0x4bae814cef1329bb12aa8d53c74f48b8538cd097ad87b085ffe654a2d0aa1a09. 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/9d29e8fd-3a1c-4f26-96ae-edafff1c5802.json and https://artists.proofprofile.net/proofs/artist/9d29e8fd-3a1c-4f26-96ae-edafff1c5802.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 0x6bc78ba5370e913927aea753a5c1291dcd65f2f628d717ac11178130fac62327. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFZ21906637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fa6d0f6c83534f1c628d682935390074bdb26b11a8900de7065a802e4921ce. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN51936744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2740779293b1433c4749b9ecc3e9df20ab70ab7756f38d827171aad2b53e3f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:21:16Z), 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/QZHN51993060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84b8355ffdc6d901f211936d1d004f9a4c55a0a8cecf298f20f53014f0e63f6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHN71984630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34030386cff08109bbc01bd1f543775c6235c310f87df8efa5f432dbf2963d11. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:32:41Z), 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/QZK6P1916991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c5f3e2496077c4fdf4e17973d877440efcc5bd94d0de68b979da8b7cfc8e22. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZFYW2091070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515913e37209b7d033dd09c324e6ebd3642d0c7c25c7566fec8ba00b85484e6d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR9W12010166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf030ea6ffa96ae7d5ca3ceecfcfe34f048ba91984b404030f1e2c906ad8fd95c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR96X2038373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b76feb10abd331ce68a76fa4317835d367e5f606f13e3a790c5fb2fd58029fd. 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/GBSMU9353020.