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 0x89cf18538c4682cff2b7bab4af8163a74118a36f17a209ef411d509ee9153176. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0177829-bf13-4c9d-aadf-640423ed0695.json and https://artists.proofprofile.net/proofs/artist/a0177829-bf13-4c9d-aadf-640423ed0695.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 0xd09669febd3dc30eda5002c0abddac9884062b0d2218d765ded49d6216d4ce2d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USV351328432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882aa7fc6d8577cee66e1e7015f18784bab6722c83082c909aa5e378fe6397d1. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USV351328433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a245e5703b01b2fd503173677438e733b78b3411fa2f8f59d31086cc0620db3. 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/USV351328434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9917ef57a33987bf8db419f506907e36eff3bd987fdca7e993913589ddc36d. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/USV351328439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591a6f7bd6870f5d8b99e1df3018c6210c1ebb4db9b104c90e6a4256d1e0c596. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QM6MZ1437609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b14ff93c6599150e8c762ffe5cf8e40a384f1f936369c16ab1ab0cd2e57e951. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QM6MZ1437612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9491bf023c7298c2f1191e05c1eba18482525d7cdb7af8b8045461c628ba24. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM6MZ1437616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66017b82a3a0155bb250dab458aa20510f72ca1c4dc048b2403ffa6c923839c4. 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/ART981700363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3facd1be11f89b3933fddebaf30acc5267899449610a09eb035855baf5b985. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/ART981700367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aa2993c107857ea41dc8df6f3261acc33777e15f0e9bbcbe13bc776234ac8f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:39:11Z), 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/ART981700369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfe606c6cb99ca81ac7f63003e4664b9f45c69df0c1182c903a1d3f421d76cf. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:06:12Z), 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/QM6N22261605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d90ffe28fd7c6e3665a8265ade2270169a4042698eb2283c64bc9e4884142b. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:05Z), 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/QM6N22261606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13607b78e652d63d9cbd46cdf587a7cf4c4f94d21e94cdb063cefcc398d92f99. 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/QM6N22473213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d96b483e38319a696138b8810536a1816324a46c4e8714652e54500df4d78d. 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/QZNJY2527848.