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 0x0d73bf28f350b9eb5cb7ae161a997261e29b03403b723a70ad301184594a51d0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2273a039-50d7-4979-b927-3347350d8d3f.json and https://artists.proofprofile.net/proofs/artist/2273a039-50d7-4979-b927-3347350d8d3f.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 0x83048edc6e50d8656c7dd07b5883d3e7ab1a3d86b59ccc936f333378094e47e1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:47Z), 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/QZPLS2379024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1b5241813207593a57a3950d62435eefee25bbf426bf937b6962f1b650b826. 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/QZTB32320055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4149404f7b12fa85527a5ab350248ddd27eb42055acd4db52b10e172bbfed81. 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/QZFYZ2469878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71525becc4cab5ec95a6f56034090d533c978b76c5e04318cd028ced1a9d117. 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/TCAIB2404692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa038cc48b8dcf12263d5f6a5ca0bffa7782982aaae74509c62450158351a4a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAIB2404728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26e8ba0a0007d115a7e0b661f590b46b38be5c9e6a7203f422d88e2d2883d8c. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZTVM2417481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0424887c5a704e03c8769fe70cedeff982674fa9ac1f065e6dd9f774c019760d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FRX872504931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade8eab514642ef33422ee5edd7bce8f68456212914b5b6bc4712244b4ae69f4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FRX872504932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963debccf638b0c702f65d00f01403767fe4d497de373bdae82bfb06a3b7f6f4. 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/FRX872504933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d58d417a420f975d3d03cc3fdafb569cad0edccaae13a5270e050366f4b05ec. 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/FRX872504935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2872222bc714a1f6cbb6ad19576aa9edf09be15dc18d1af8561699979498c292. 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/FRX872504936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafee0d374e9d2720cc9ae5a23e1f73326a7bfd541f6e50f5dd48e42962dffd0a. 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/FRX872504937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe71e99d2fd2f4a1d74b97254573e561ba6f33c1c085b3d6841a59d7664dfb31. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX872504938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2c709c2ce357cdf91cb932f65253f98e7a3e8c3dc0404384c8e111b5967952. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:03:18Z), 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/FRX872504939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd86ce44492e7d3ecb8510dc2e79d22dffe65808941270c8da7f010a8568283b. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/FRX872504940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d41151a4be055f51d01d3eb54c33bff0407241fd5e454f86e75aa5a40964b0. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:30:08Z), 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/FRX872504942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb2a6f4658e450b8bce4bd90daad8e3b586ce3abaea750ec6b08e47adec9f5c. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/FRX872504943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2480563389114207bd7f9c318729d24baea790a35249d554ebf25fc4001241. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX872504944.