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 0xfffa059003ad12b6b23d9c8056e0f75df1920f90dc613be411b0a92a0358c3c8. 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/f223f29b-a189-442c-8650-77c544f62a16.json and https://artists.proofprofile.net/proofs/artist/f223f29b-a189-442c-8650-77c544f62a16.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 0xe70134d678f0f38df0fe042af3b695541cec4f8fd20333beff6c9bf2fa15aa10. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:12:56Z), 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/FRX452072280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb929abda6395b00066d7b698174768d7a182e2c423ab55823b3667d11a0de4d0. 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/FRX452072286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b971d890a9ae15fdccb8e575f325ec84d6f27805a4a515a1b464cf6ee98064. 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/FRX452072287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57cd3d6d06da4e7f4540fa62ceb1b1dec921c832e244aa1395b0e30fd2837cc. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:01:14Z), 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/FR96X2029101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372b3d1dc613a14ead9e9db0f2d57d9841412416b4e0d2d6b4727085a497f6ba. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR96X2029102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe567414e84833b0599f4502c55def641206b842af6f4a7dcf03cd8a9db0b20c3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FR96X2029103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f3cfc14ffe51936c5ab5958479665b463dcf413034d28c799e01b446997bba. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:41:38Z), 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/UKR6V2177761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1999961bb4d74db9008a937cbda2af27a71122a42943add6cdefb86c95d4526e. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/CIA1L2500030.