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 0x394ff613f6a17d8e76f971fe363060c868f4eed7db407c9a6871a1e7b6ef93c7. 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/876b9d44-0c52-4e07-97c9-1cba6ec008c5.json and https://artists.proofprofile.net/proofs/artist/876b9d44-0c52-4e07-97c9-1cba6ec008c5.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 0x1f958425a55f9d72195a96f83042606556bb4b20adc2e8fbe713b2044f085c8d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:10Z), 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/QZNJW2308240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6f5de9cd98caf172acbfa6ea983c6b3aa6a709080682a6faece63c0fbb5ba6. 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/QZNJY2359145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde3f2f4b293e71339181e9ec7d30518010ec0ed5ce11767f6f1ab5aa29a920d. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:42Z), 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/QZNJZ2350254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6853cfaf9d46549967590cc323a3993eb07ecb40572d3b60870a50f88dec4cd. 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/QZTPX2331443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5de1228ff528f1da24de8e5c16532b0d6b9b381769b33a8cb52bc25b32818c4. Chain 2 (Bitcoin): anchored in block 957961 (2026-07-14T05:58:47Z), 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/QZ5AB2478058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e8d20edef97cb8dd1d8ab618c44cd199158aa6f88641832fd0ae64da695528. 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/QZGLM2422228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5f54265f847f661e34edfc7283246bea721ced9c6f23d69f94e7a621ab9271. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNJW2446942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aaaa3fa6810b2d411e872b01ab0d08c4b877bee5656eadbabce92fe27d3752. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNJY2441598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfadab0f8c4e1b26cbb2e34732638d23089b1e012778449acaafc775bc41ec7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM2549526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5162b87fcb25fe0439c13646c2c5b9288c6e7434e1ef09ebdf3c34419bf3b26d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM2567088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68db5a72b44f1440f881a5dc612177b8957a39bb5aac78079a22288cee5b987. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZGLS2514067.