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 0xb491710b735aed93eda6a46419eb2d07f49622fc41350f5bd727781b84250742. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34cfbd22-291c-4fb0-8476-ee0cad446237.json and https://artists.proofprofile.net/proofs/artist/34cfbd22-291c-4fb0-8476-ee0cad446237.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 0x29686f624fbbf776893179076c96d95177f56bb07b40e87be321f64601655d4d. 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/NLRD51967553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5f909dea192703e8d5656b5c27fb1b360bedd957c9a8e404f221736e35090b. 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/TCAFQ2158533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066ccbb6b3c2067fc9df854f535adc28cbf9e43f37d00d13aa6925e05a8eefc9. 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/FR9W12129020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7228ac6d90377a4d5c6cb1c1ef189e2f5177592bee0ee3583a823e3230e0f2ce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12203984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75fdc2632c080aae8f36b6cc5b2c3de62ca0cce9ff168f87300b5b1a904d69f. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR9W12222351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d83edbcfa30d7d81cebaa7001aa3b14cba0e3f24278282d4efdf898cc13c0c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR9W12303452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aebb72328276ebe8858fee63bee5189e661e4abbab59958c7cf4ea4f822a9cb. 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/DGA0Q2327590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dffba06f8e397e28a1b2af116bf57ad62a0049f74bc56cce7eee5ba745e07b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR59R2434085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6dd0e0244886897cd3c85d4e4d274a8b897f8e594e9dd1b90d396dd60e5cf9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR59R2434086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f75bc967aa8b23d178089ec86b624f8e144e95b93cdebe6938af11fcf9e77d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/FR59R2434093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57512bde147bd09695c0c7d3dbf9df89abe0387784ab63745eaf6d8060ce230. 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/DGA0L2411941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7e6a71d9ab1d5bdbb8f0861df493618f98b60c5f5bc06164bb443c5cfbebae. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZWFH2479181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c52ded4f4e8c9ae8d568efb6237fd2723c24642f4a8b7d5389d9c30cbce1b16. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0Q2493277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b964e010840565a828e11ea60c0df897b86ba5b634769dd765459be1d2d13f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DGA0Q2489155.