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 0x99dd8e85df3deb58017d63712c425f169e72185476214df9fe442eb67097a030. 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/b4d6f72a-99e0-4173-a58a-c877f9c4537f.json and https://artists.proofprofile.net/proofs/artist/b4d6f72a-99e0-4173-a58a-c877f9c4537f.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 0x4bbd0b3df0a113c8d437b9e62ce0fcb7b28633e1c400af009f62072032d95619. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:08:44Z), 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/TR2801000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53755a1d3d8f8044fa02c66034efa5216de6e01c466c11041d09fba809e5d237. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:14:30Z), 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/TR2801000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08942685e51f19d3334f8d71fd53ace00bb823a1caeb9e07df84119c8334fe41. 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/TR2801000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b93bf3ee843121b518dde04f38eab0e6eb57cd7a9a4b6a63300c93ba0db1c5. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TR2801000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d68b8c21c3221b4acf2e6efff12537705a5b42f3a22a67066df0d3b6d33f491. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TR2801000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7460c325e2e071ed91efb4f6dff4ede83b4be40fe761ad90c8b3084b64b10d7b. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GBSMU2846191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b19034565a1f8524936b2103a72aa87cc227a183c4054815f70931c6e4b303. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBSMU2846193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe204791f370efcab940deab5ff0878647e205f009f716600404ec33196215212. 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/GBSMU2846194.