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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b43a69c6f9fe4958dc03eb999dd1095021a4fae613eaa8efbb7cff4ef2a56b. 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/c6a397f5-3a49-435b-be02-d3080ce9293e.json and https://artists.proofprofile.net/proofs/artist/c6a397f5-3a49-435b-be02-d3080ce9293e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae114bb1a35b966e52799de6a43558aea660b7a758860bb1ca154d3b7c32c9c. 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/GBLPF6686204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d217ccb821520eafaeae381d576aef8273ce6da888500b9a28d0d960d3a6697. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBLPF6686205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb248ef98a16bb8f12e9b595031f34e1b49078df22ee189c1548e3556d968216a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GBLPF6710223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab6a8615f56ae4b9f5c560d1460beff4c652377cc8b22fbb3d36d5f78eabffc. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/GBLPF6710226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607a49f90291e158d083d32821ac6e84e235d0b9e81f67e65f091607f97bef19. 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/GBLPF6710228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab080895f520a2dd0a3000bf7d0464d05765ecc128fc20ad58c8438517efe0ee. 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/GBLPF6710238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d90573c33d28a0d027b5349751d901c2ea9a5e7177f7062217cec7b1ceccad4. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/GBLPF6728809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186f74ed40a976365818bf3216f90fb03837e0b30b43397b70f3a0695a74e117. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBLPF6729788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99b4a87dacd082be3a61425fa8df887173cc8078e2313a5911a238c29a2547d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBLPF6710161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb2e0201f1794ab3a8a8b566a6a5eb0775d57149bfa71bd34b5658ffae7e5fc. 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/GBLPF6716606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc776e5dbb73dff9b092cf460a395d396ad609168bd88be06ea930ba625ce2902. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLPF6705125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555aac47ffa0b85b657f33e0d324bcd7567e12859605c91e5e290e83c67ddc2a. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/GBLPF6708832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb2e0201f1794ab3a8a8b566a6a5eb0775d57149bfa71bd34b5658ffae7e5fc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBLPF6716606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d326a9f18626b26bf98939cdc49c81d9caf7198bdac095bc095647d2704b04. 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/GBLPF6749484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35aaeb0526d520007a0da09ab18a42b95d87b8fd46bc4ece50fd264c9a6c651. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GBLPF6749491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2630c444076ba15112073f1150d560bc7f357db7271a1f61b5c3926b73544a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GBLPF6749492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841503ff1209d62e1ce942883520a6123d290b49c5ec6799565a147d3c98d648. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/GBLPF6749494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b678a67c5479ddd15669038dc558a696684cd92c2292a9bb4e3008ca0c6efd5. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBLPF6749500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e26f246143d560db7490d6e0fd43c0b47699bf6357316d035effbbfc1096b9. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GBLPF6773603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a7c322fa54c011399bd9b6c2277d73b49a187a4665832f003fc25bf1323141. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GBLPF2500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c5e6f5d929c62fea27001fcd46e5d224e43b9351f7de65fa3b287c80ba6c8e. 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/GBLPF2504391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eed8967acfc8c7f543c50cd8e0d87f3cdb94d054747f1e5969117e68cb3c8f2. 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/GBLPF2521879.