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 0xc51645fd9b9c31d22d7fa62f0def9a9c9dc5bca5e22e5bcdc9edf4ce47243856. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4de21b4b-dca4-42f4-9eae-4ec6a071272f.json and https://artists.proofprofile.net/proofs/artist/4de21b4b-dca4-42f4-9eae-4ec6a071272f.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 0xc0eee3cea8fc810240f99ea4fed66755f569ba3d66ead8cd2dab63beff62132d. 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/TCAGF2208062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb6f49fde9cc536eca4d590f9e0a0a3e0f59524567b09358de7471d60463f00. 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/TCAGF2208070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929ae5a7ea75fca1a4677623349793ea9d285493fb90acd5df2aef3d5b95eae5. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:27:10Z), 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/TCAGF2208074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865190b1b4ba83c8d1ca4369f2f7cf4b476834d569fe1386b4f0700b95b0b247. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAGF2208083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a49f667c12c15861fdd074be8a092dd349a5506201455770a868f2f659659a. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAGF2208086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec994abda01ac1efc5a9dcf7c520cca776d9b25e7f2f12a78674dfc8c6536f4d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAGF2208092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb630102e3494823a83d4f9c8f9f58c51b606b37535b8d91b05196ec5de8aabc. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAGF2208093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf462d5c1fb4a0e83fcdb2c37b0d587b47b0ec177a8d56aed1fafadef37175621. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/DEYX82151129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160db988a8994793aa0407a73724d784bbe43df454a7a6c9bfc12ad388af1373. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/DEYX82151128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa1f479c43c324c16eee75b148e9cdf4efea940af820ed0c8b59b4a21bc47c6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEYX82151135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40aac0cd255b88ac9e60bc4f214d5f32998890858d9bdbb65d94f474e1247e6f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:38:01Z), 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/TCAGW2310834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbfe29bef1f8fb94d2d8773aead57f8efe4bb42bb71e80450ea4b6ad80d2bea. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAGW2310839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625fd2f4431edbb6246c22493a0965207983eb2e6efdbf8a43873f39b680da12. 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/TCAGW2310849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5172e775e53c8dbfaccc215e9ac858da5719ae22291b62fc61ef1f8f32b96c66. 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/TCAGW2310855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8e7dead3ac7b213dbcbb5a9ddbf9b760b497728ab22c27d770e864d4a82823. 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/TCAGW2310958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c0d84a59e492e374e9c9b6c621f90d9bad2310e2dd5c7f0886346a4d3882cf. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCAGW2310964.