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 0x782331cd25aa51deff3250493161ff2a3d163e5529ff21e7ed50644c167a9484. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fd5a3dc-df8c-4275-bd81-fa84348af303.json and https://artists.proofprofile.net/proofs/artist/7fd5a3dc-df8c-4275-bd81-fa84348af303.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 0x47a364dbbe45ee660bd872fd7d03c65524ae917a30d5e916611891d97b5b4d0b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM42K2040954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20beabbb692313c7086cfbd7518261fd7e46bac690a936f3a158cdd7b5025af. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:54Z), 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/QM42K2074319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e44b44f0448580424c4d69afdfc2494c8cac4649ce718e3e7815708b632d11. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:54Z), 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/QZS672190829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c595eeb6692ff35de3d70bac28ffd1c90f7e7a186a8ae669da262662519d4d0. 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/QZS642224169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6041ddf5555bd6324643e5ec71e61a543fd6244bc2c35348c99f9e2b111aec42. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZMHN2442031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7653d0c7e14ce38e18968cb396fafbd8c2a33d171b790f6eee2512d874c85ef0. 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/QM42K2501455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e974ffa5807f2f4eee67a85e5ac41037cf99029d5accb0a2750f7690e1d8189. 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/QZMHK2581564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb32a0905977b5a3ba2e3c04fa46343c95f5a68742d3c81d7118cc55eaa7ac28. 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/QZHPJ2591458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09715ebc8f931702911f71f222391523a866c2a6ae54666debf0bb4b9713a07. 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/QM42K2042768.