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 0x70cb4586f2cbcf2f38eaefd576c6a14679b577372a0a933a5f3052fa2092a8a7. 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/c1fca2f9-cfee-402c-9035-68bf0e68a74a.json and https://artists.proofprofile.net/proofs/artist/c1fca2f9-cfee-402c-9035-68bf0e68a74a.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 0xca7da5f6c20026626d8148e54da70db9cfc3bd7da113bbd9d127964785b8c3d2. 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/NLA240402204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc743c6178c35c2c397a461ccb05fbcd7b59c10dd2067cd0f6bff8a1d1c7aaf86. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLA240402208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc3b5dfdeee2f3fa884582c25d54076ee9f818144202dde5e71e7183a3bfa26. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/NLA240402217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616de3c4a402cba61248e45ef03d529fdc66aea5b0ab29f7b262810dfb256259. 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/NLA240605814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0c1e9513be2f3ad91a21af14fd5d64db98841c5a8a34e0c4fa641a913ed978. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:11:00Z), 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/NLA240605817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b13247a4e874560096cc4150190801a229e487130026185d5dac717b9fbf91b. 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/NLA240605815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5357461298ad23068c509ba77addbb80889285e2cbec6049eb2d2c4aff0a363. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:48Z), 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/NLA240605816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeecd4b411fbf0a197432e0e87aed2e4de85d142953663c6eab46a40aaf64e92. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/NLA240605818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17310cf34aed9bbe8b3a03b0d6a334feaa4eda384a808294af359317554819e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLA240605812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cc2d90c21bdd6935341322ceb95b385df577d643d26ef995a68afde63ba1ef. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLD321301891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64de5d556400b6a82f4d4b3c45aac2d5ed6ee881906b2bc5b8aae91d88cd56d1. 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/NLD321301892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a99c8d2db2ab3a1320cff767a835bfd983f90251174045d01f10307e916074. 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/NLD321301893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde968dc7590baead464b928739f95735bde2e5a2878af201b45bf3cb54d750db. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:59:56Z), 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/NLD321301894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75c1d7362910a39efc0677a1c7c0370fc45c32b9cf28e964feba9c511d625fa. 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/NLD321301895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a57c48b2521095fa549160159fd5d70b4b2374a96071b66b8dfc6f37706a3be. 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/NLD321301896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176350815817989a115505893347258048c07f2ed59d113ad3cb9bc2bc600287. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLD321301897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8c6e75d0d9520d04d8ae8df89449916f27d28f5361a607687d483d3e5462f0. 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/NLD321301898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae63e4db72ffaf08aee4aaca15a5756a7259c93601e406c93324aae0f222528a. 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/NLD321301899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b57514b0e5a4c51e0c310332648645c8a580d5eecc0136de143715343e76fb7. 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/NLD321301900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4fe9daa9928e1589314957ef971d099cbeac519114cb83f1f870f4bd2e0049. 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/NLD321301901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d91b85462f262ce21f7a363afa7e35c95c769677c4a73e31db6e2fe8369845. 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/NLD321301902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae57c4a6860eb0d7a044e4d666a7a9d9ea5447952eaae3c6d859b00a96e7c735. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/NLD321301904.