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 0x28c3b2a5fedb5c083db8235af605c4fa4b017e9df3fb2e5cfb7d184e8a94916e. 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/c2bca237-c495-46ac-865c-f469123c0f1c.json and https://artists.proofprofile.net/proofs/artist/c2bca237-c495-46ac-865c-f469123c0f1c.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 0x9f082e2cc5a88fbd714deaaa520d40de5fe74e1daad87fcf285eda72fc287a7d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN62052841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b6db447aa4cc1f39e1fbfcc04605d81e1e4c3e2aeb238b9e362983a7ceea25. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNA2026804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2208e68b07cf20554864c58b827a89e0988b63c0da0b803c728e90298c0293. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:06:31Z), 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/QZNWQ2015526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c060e552d1bb111ca895d35e8ed21f75194560b566fdfe31799aa07a0287ee. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZNWQ2015527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9ffd933a8db203fd69be44b700d43381854a94a66e51d7ade9cb2b4b020c2f. 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/QZNWQ2015528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96ca9214d73b1fc9dde4e397b615435c1763d41a289197ee19790a88c6c684d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNWQ2015529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bf7b51bfadd2117751233e2b03ab93e9a9b2fa3a4db96120f6d14258855f32. 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/QZNWQ2015530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f07a57debc3fc75f3e61fa2abfd47c1def5fdb10b997337c59640f992ec770. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZNWQ2015531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc337c48a16a1b9a95b7bfb055f6e2778fe1b1c598c5e700001a6a4a1023351ee. 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/QZNWQ2015532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f9990757d6bc6f06f8da157cd634ca2e462112d30c7e7502ef697a07b772f8. 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/QZNWQ2015533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17b016376253b7ef8e2d85e2a0c4d8fa06d9c0db95f6f13b0f9f3d88ff27373. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:05Z), 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/QZNWT2065183.