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 0xfb30286868ced839e644a23a1d2c4e8b0bb136570ae5263edf53d813c3eab397. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e440343f-8c68-421c-b559-c2a44b7966c2.json and https://artists.proofprofile.net/proofs/artist/e440343f-8c68-421c-b559-c2a44b7966c2.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 0x4280805303dd9c630284f2b94eb86b3a598e7b207d9a046dd0b82a3ee19df607. 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/QM6P41517373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5d7e82dfb3aa1042b5810985f3ab495fc03826c3bfa5040f3e36990c8d23c9. 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/QM6P41517376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64943a60ee9582021e75347ea78621a6ea1ac557c9e3b3a6a7d40bda835474d8. 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/QM6P41517377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365cef3f745e395c0b7a8e0df33ee08a8399d74b3b9d156303de7c73e85039cc. 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/QM6P41517379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8413bf4ddcdff134433a031e4c7c69d5ff9c00fa9a814b0e7ad7c0f5b1e776. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6P41517381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3f23ee6faf6197b45ab49e0943ade76a66a428d78720962e862a71253b071c. 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/QM6P41517383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dda38342a129455e4778aaf68dd4a190caa01b9c4d9607cc9536b06c858ab5d. 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/QM6P41517385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117c3311e7cb66b510429640cf7b427abc1afded42db592acb1a91eb70c2b3c8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM6P41517372.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc912f39f6dc72839b3eee921ff7010529e8853d2b1fc5b91c12b17a370dc4c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QM6P41517374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e553d0fd5c8490a01b2921bf614a6d222d0d1d147a15369d9c78503898db5eb. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QM6P41517375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ffd06f3f710272960c9bc23d06170a52e8f032a5ae748f19e423fb20ee3827. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM6P41517378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbde3413033448cb36821fa0a63a6845ddad2ac88f6a99093c5c4fef617cd16. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM6P41517380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dd594035ba3e05c24238cd7cc9e24214e7ed17073aa3798c0a038916c41285. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM6P41517382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409547d0ff0961c98f3e47fbbc24d120f8eece6b0b2292a9330865f23efdd607. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN62238247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335e4b887e7fac147cd73031225ac9aff504638bd066d0dd180ec67ed627ceb2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN32281628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fea832a00c0558ae494d80c17eae2e367cd155a8b41a829cfbb5db2f06410fc. 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/QZHN62238250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac3c6f3d0cef6711f66a5e16dfc755b463c7e17e8798ec8a197f75ea9e6cd4a. 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/QZHN62238251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2674019669779d77770f6dc3712cfc03e8ce7960902e80ea6351e98fac037150. 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/QZHN62238253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156ee569e5d459a9fc38a27c05225e103c08013b356803a20b6cc6b86e8af166. 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/QZHN62238254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94825a1ed567ef6b12f0d3a53325de8f47c8700445e8281cd8e65fe118fe7ca. 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/QZHN62238259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf34dc61d9eb1cd229654b165de8745cd03b5c92c0a696ed8b1042f0caf1442. 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/QZHN62238260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0237ad70b78cea8d518eab5b0729747be04620e6b123204e4e4b5dc42f74691b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHN62238261.