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 0xb0e631d729be458f14673abff52200b9931042634de748e33d95ba88b9ea93da. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6798bded-262f-490b-af50-b1fe2b629a54.json and https://artists.proofprofile.net/proofs/artist/6798bded-262f-490b-af50-b1fe2b629a54.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 0x3a501f361dd677c4d50489b85c7aa28218ec610f5bd4e122b2961ae722306633. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:35:18Z), 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/FR26V2085743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ea294f1fc31fa9678b78a5ff16b4475e086ac3c647d4d0bca2aca3826a303f. 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/FR26V2085744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d556b49a9a6070d67fff0b3fdef47a4be2262b1705912ba06c577ad19efc3f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:47:02Z), 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/FR26V2085745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edf7baeacdb0d34e222d4a653f163f02a8355b311df76a7c0b8fdd961fd1f97. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR26V2085746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe93ddae91f6ea8ba0d9eb8bdbcc3ad2d026d51504c940904822a0db169e9ed. 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/FR26V2085747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf0cdcf5f0eaef59ea19ca90941d9ecf53b2a0eb920c22976283bef60f9a6a0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FR26V2085748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baa24d3fc506108f492d9b0e9507b75c119f9d99815defe8e9888ecc67a28ed. 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/FR26V2085749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b352521f4bb95e351112668b63a42be5d81cb159c15778c8e04993c068ac1b. 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/FR26V2085750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa24902d40cafd4fe2c3d925cffcb8252b2b166abf5dcca0092c32b51f85348. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FRX201936814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5019d1147def4b938f543565f9d4be0e311d96bcc16ea4c91aac7d9540afbc6c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRX201936815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66fcc6e98105a896f5041cb348152e6c118521d86997950e05908c2e7432ed7. 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/FR59R2075507.