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 0x90ed9e32361bc3d7a1f5a160ba071d99503f7af4db2784286e507c5bea132ed7. 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/0168392e-3b1f-4ccb-a404-04852b88f80c.json and https://artists.proofprofile.net/proofs/artist/0168392e-3b1f-4ccb-a404-04852b88f80c.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 0x8d66100946581b6f97070d1dc5f8479e2d7369f1110aa900f54f295aa1b2c441. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6Q1985255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9579ce8452b2e0756f6b06c509186079e51fb54ffea55b1901cd3bf82bf37b07. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFYZ2180620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d0cc4446aefd9147abea951fe7e90544642c7ddd7cef194a950431695cb8b8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNC2128149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f8c122e1af1e58c8263995d201965526611a01654c822efcc1a4270b292d10. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/LKA0T2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588116bceb805f645d2b0c9ada4c0a42f5d5b456e65a71d1f13c07ff78236181. 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/LKA0T2400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96326c6184adb316b869277953055ee44c80a9b1c90a31a24ca67a23cb7ac85. 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/LKA0T2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7cb9a37c579044fe55380048ea94a47a01cc18ac26ca7ec06925eb04b0cf6c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/LKA0T2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1effd27b9e7f820664e16cf2fa6a92eb461933bf80c00382b11f65a1cf63f87a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/LKA0T2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e6c4e025d7d48fa1774436b408554a835253b7e2e8802a4e586a5c14d64cb3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:16Z), 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/LKA0T2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314b350ce00608ba4c28bbcef914d7125cea541dc498cdedd58d0b47d8efb418. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:02:07Z), 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/LKA0T2500033.