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 0x3a2f97e0b68b82f015349c4a8b36bed3db71a4f6c566a1a9bc4a706be188d948. 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/9c284b18-1c1c-4482-b8f7-e7d3f0ea00c7.json and https://artists.proofprofile.net/proofs/artist/9c284b18-1c1c-4482-b8f7-e7d3f0ea00c7.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 0x6471291f415a9714aba5bb187ce2b21b6894372aa8042218614627cdd33ad323. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/FITLB1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229354b3249745a22e8f7b7026129a480d600bebd3f3150771441d0661061662. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:36:52Z), 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/FITLB1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f154cb3001d13f90d8fbaf9a8fb7e7d147d123f768f4259fe2b1ae87ef63f6. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FITLB2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2083e9ed44b84cdf4c3431f2f7ec210c703257887bba227eeb5745d6bff0db45. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FITLB2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc904ef3c016e6680f8b858e7de0efe4c643a0fb315c20459b1eb54de92dde1a6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FITLB2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4738a5b514e44a5cea08cd49dd8c930c72648cd6aa742c51a90585f76a229a70. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FITLB2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a28e2fc04668bc75622344cd2adb82859afc61e3623583b4572d6a9ae7b6425. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FITLB2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f736bf678c3560eaf5b9679e8f7acdc0c1115973a7091c5c4660928afa2d05. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:41:28Z), 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/FITLB2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95f08bf2a0c9038e1700f48af5ce6340604deb6280af56e9d369378864b4be5. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/FITLB2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c62753df8e9a0e697c2c09f86c315ccb41dea20b1af4e78d6313ac1bc755bb5. 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/FITLB2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda964754032e0beb6fb7605ec23291be904ed733feb8bf475e6b8ab70f20f003. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:39Z), 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/FITLB2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad93708c276346fe2c94a20519b2bdfb1e0668750c5690277e98e48c141dfc3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FI73H1600006.