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 0xbc5bffa3ccbba298a38148f87fb3f8abcaa391dc657ed2884f3b4ce010c0089c. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f9ebde2-ee8d-408e-9fd3-285da142b827.json and https://artists.proofprofile.net/proofs/artist/5f9ebde2-ee8d-408e-9fd3-285da142b827.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 0x999e1d73f400869d1bf61f07e02d556d5a2e12c40ecda62e53ac826cb43f07f7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BR03D2402038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd499ab94c510364f7e2d124a21454c621089bda66735de9f97148463e8b0276f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BR03D2301074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bde166009e37997be287225d8a216f3af702e428fa03fa19a850fa52ef10dd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BR03D2402039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee9edbedddd6a64970f8809bd18222b1251e663bdffbc0cdc0f2e389b26642f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BR03D2301075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175c3c55a77c9c65294040e5566d2702aaf03da92a82daba2a15e65d53ed153e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/BR03D2402040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c41773edef4eda7a5103fc4a306bfa2b0674a7965b559b1b6a860da05813d1. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BR03D2402041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae166495e1895cf3d9a9e129b1d3518bf4a89eb5e67e4cdda35dbc1ab061f158. 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/BR03D2402042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f26182a65cd928d7de54996a4e0e530d778a29bb1acf8826623a94b9c41dc5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BR03D2402043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3930822b6d4a175164993e1ecfd44216c633dad302dea517ae5aaacd09514591. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:58:39Z), 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/BR03D2302950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f16642f082dd1b4e008e423659041eb06345b4573782cea00330560f61a397. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:57:39Z), 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/BR03D2300912.