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 0x18551b4dfb7e68ff38b360687693c145ff234f97bec08c45d8950034c24d43af. 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/e88ebb33-151e-40b3-8f3a-bff9f3cb57c5.json and https://artists.proofprofile.net/proofs/artist/e88ebb33-151e-40b3-8f3a-bff9f3cb57c5.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 0xd098f8dc18ee81841a64a8421e6be2d120b82817cd41180109e15b27fe7dcac9. 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/JPB752123501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3386e5a77c9a301caa03f134438f9c33c92ac960ca93449f05f076b66e87ca8. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:28:13Z), 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/JPB752123502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7732492034f477f79262656b64824eee9fae5dd50517ac7b5b2b6412e0ad76c. 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/JPR502206659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f875b56d336f2492112a00e728b4ac852a8a7a5efc21ff75464ecc9aaf0d7f2. 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/JPR502300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf80dfd375c077707f6500d327176f34795b71e041d055cac1f107776258169. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:36:09Z), 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/JPR502305976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d2236c155af2d53373a1bf7654fe5937fed388187c729ddbcc501ec64f10aa. 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/JPR502307553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd682cd9f402f111aaa703b42067d2637986610686395211670cc93f376c0c9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/JPR502410437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fecd63ba64f4c0786fec66a58e25727754923cee85f60a8b48c763a89193a0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPR502509217.