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 0xe4e85065f2a4b31782142c71161ba6a963985c32a28de75bad345935a4620b2b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c299916f-eb63-4921-b050-1ebeca5ff2c1.json and https://artists.proofprofile.net/proofs/artist/c299916f-eb63-4921-b050-1ebeca5ff2c1.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 0x8eacf8abfa419a24b9d4d70829e5c2e918ca4f451d66e47e79eeae2814a80d68. 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/GXF9Q2592406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9ad30e46be11f4fff281c240f70b2baadc8bedb834e1227743acbfceaa28be. 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/GXF9Q2592407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e46366e864ba03d56ff829a3015d2b8287f89789f0e2941deae5df65d6c88b. 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/GXF9Q2592408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e98839abf7ad01f275def8ae0d14fcd17f981f3ab10f139cfbf60febe12416f. 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/GXF9Q2592409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7761568fc453388032c69c22434ab0ff3ac95a3ad67d7a7a0a486ee55a2d639d. 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/GXF9Q2592410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924c350d9bcecf357e6a3aa6b1fdaa13fd2ba67572f9ea4f60bc8248d44a9681. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GXF9Q2592411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4b1537b3afc1b0a839366ba1e1d9871f798d3fd56b3ddfeddb75eea396ef16. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GXF9Q2592412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ee599ed645796b5b2b57ea6d09266f4c3613ace690dd36120fb8acee19c387. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXF9Q2592413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d7767a8762ce478b5e494898e4d61e5d9fb2e6d572cd576655f145d1e8aa78. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GXF9Q2592611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99667934c7953f159b58c98e2803bd677f5c06c43ec0d2e6d5c948ee4d170098. 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/GXF9Q2592612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e216307d017fabb7ba307837df6a892a36eb3d31c9df77e89b5428e99170929. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:33:02Z), 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/GXF9Q2592613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9760c13b41e1e0615c1a97a5b46d7c6fb2baa50332e54c174f21aff15156e610. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:42:56Z), 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/GXF9Q2592614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4763e390d4ad1fb0ae0cce8258f961900499c2c87d573cb80e03a4d8c47c6d01. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GXF9Q2592615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3793f0ebacab9afc5c44e27c6b6a1d26734fc732f6d1d12e5bfefefde4cd4b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T12:00:06Z), 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/GXF9Q2592616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbc586cab57c75f59dd515db8091d5bbe66df2e55cf94dcb7d3d61044e1d3e7. 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/GXF9Q2592617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d24d8c69e227040ca99e5379945857b171fe31a81fa90af285d1e4e526a130. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:42Z), 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/GXF9Q2592618.