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 0xc3072e20ba5e45137ab2c01b491efa126d1953196b8582223d16e5e9bc65844d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdd7d6f0-a89a-4afd-8626-a52a4bd06e7a.json and https://artists.proofprofile.net/proofs/artist/cdd7d6f0-a89a-4afd-8626-a52a4bd06e7a.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 0x8a0854885a86c67f207350317df182cb3d46f6b663cf221c6a5cc4cde2bf7c6e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZHN92170518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe955387d60473ed871368638ae8b6fe9b1446663e98256f8472266c94fc20d01. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN72356548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a30d9327fb539ef8ad382e2ff0da182b155dae36b41b02716ce00f7bec3686. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:32:43Z), 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/QZNWY2319282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370440a01d9992f5a739c0f0026dc52cab068f2a268793788bf360d3c066c12b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:41:48Z), 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/SEUM72401411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6cebe3ffcca2c0512888648c6d69cb65835756e269d77bd7dac9f6d312edac. 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/QZDA72586753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496b03383eb494d0d1c98bc39fe604091641783d887e1a9989a0c409addfa66e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZMEM2518014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6921a4ea9b6ae8b6c29778250ebb81e9a2dc27da5a7c6181a84d86cdf0a5f2b6. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/SE6XX2522559.