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 0x13c1e2b77d4ce63c3c4f67550b836cf134137c61dee60c5278640688b2e3ced0. 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/814ca303-a46e-48c0-afbe-456c8623119f.json and https://artists.proofprofile.net/proofs/artist/814ca303-a46e-48c0-afbe-456c8623119f.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 0x3f13939c73cbe9f3de2e23bf75fe7cc026420d26b5311b628f1e98bf3457ead8. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZEQU2046829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e07664205a127f0cac155f460f053866755d90258665ff575cfb0671ed068d. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZEQU2076456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83de6c0d72d3b0021a7eca013227af977f7d8f0cdbc215ef717d9e4d6219c0ff. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:51Z), 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/QZEQU2071014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35191560adde1e333f175323160f3a2cc7a13bd6c4b0df766478245fbc7c2416. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZEQU2111673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14557477cfa8e86bd24c4eb0326b3a4aed84d285d9028c6785ad0819471b6ce6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:01:28Z), 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/QZEQU2208856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac224f493984f2c3d10650080cc3c5c95de7e9f840ffd0ba752e928ebd88d4d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZEQU2208857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0330b405acf0db4f5d33fe25f80ad0f3aa3d30763bedd04a1a1db465bc053c1d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZEQU2268529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9a0dd98eea7fc45dd0413eafe1c501b32763acf8fe889cbe93f40a266c6404. 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/QZEQU2300527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b735dad34dc802c75552b4d554be2025929081ccbe914b4144f07e48466d24. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWH32300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc6b2af441e87d7bcaef1920ee78153694e83d42ca725cd169942950b708e19. 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/QZWH32400201.