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 0x0d1809ee38c67e2a5f58d66a1863140440068889e51a2319aa00834f892c1527. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ef70464-35b6-4258-aecc-ed94af514b6b.json and https://artists.proofprofile.net/proofs/artist/6ef70464-35b6-4258-aecc-ed94af514b6b.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 0x65aeeb306e1a2cfd0dc0f0ab8cf7f21cc08b5ba7e10009bd4022a423dff1d127. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INN242424686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97341b3a4b74eb185393093f9fef23b366d1d94f7490d1e6b796bde33c0d8313. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/INN242405716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660aa574e7ce594a715fdc1853dbcf4754a7c2f67f204772cebbd25db68328ce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IND862401350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03daafedb0bfbcc5d33ace600ba91b3a3bb2de37ae130306f93678e02bd0db09. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0H2388602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5a4e0bc53bd806317d1704df76fac09d5f5be486f8cee7f59b97b996c01c5b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INN242314672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e7b75b62ead9e86672dfe00d0900437188df5b054dec88daf2d32333c1e5b8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INN242310499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abccdb6f33602013038f3ad594e5b9184fa58929955291d8cf673ca2c3035e3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA052371033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98858178bd0f0605f333f94cba99eead580a1f7ccc58799f310ada2d4fcc30f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA052371028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d860d683db377dbc510a427c59515a1c5c15bb4cdbe087c5bf3579bc21455f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IND862300944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afc5c7e0681a523fdd1494298d69d06a0c5ab84db684669cb0bf99c8acc4521. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX452103047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a20abe1fa87658800959eae8bdb4969a0101666bb7bd2e882dcb8a3b3fc453. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:29:29Z), 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/IND862201787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf7b1b30fca090c105d037791928abbdeb2493c750e4b22c46a3df8f980f7b6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IND862100647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68facf99a2ae6c4a44f9d26ad7414557b2b19130dab70891ebbb32018e197c7a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282122158.