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 0x2a572154c367d58b56e004b38e8b9686f6053ff2ecbba48d696921b0833b9ffe. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f87988b-b1b3-4368-aa89-0a4cf662a77f.json and https://artists.proofprofile.net/proofs/artist/1f87988b-b1b3-4368-aa89-0a4cf662a77f.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 0xc1c0d809a2f6cf0bf7eecf3a23c95c1f8db2d7f46302a526d90b05f98004c6a8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEN2389965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685311d455bb6c71d73a008f23f065ea3821fac1db04058f85e6829ceea52ba2. 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/QZK6F2559927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b363e736a4b68260a3c57f04aa5df4a7970a702df7c36f3accbd2b5f8ec5c5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6F2590498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc427e69849fe7c568d9bcdc98631e09cf1ea79809ee5abd32c80ce4f7df99820. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6F2585052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea99478fe559fff28c689b32ba072410a65d08e05202d205f0bb26d979102b1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEN2567183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5602988850293757438b4d02877d360440871d6bb039dc32afaf1ff5b1784d19. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:50Z), 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/QZMEN2562353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffd8b427989f2e36477e271b6f805e703765923100a4555b20b96635a5d0a48. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEN2584850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349df079bee2f9cd15a047f56d5fab4d2c71d577919f9a95a557245b033b6d7e. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZMEN2584849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b59ccd7060016931003d11a133039c4f52657d8b49d65aa9e1ec1e5cabff85. 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/QZMEN2586469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ee5f3ac63478f4b63a049ad373d31c4f4011d3acd9be74ec795ae19491be8e. 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/QZMEQ2581232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece46cf388c7672527fd36aa3ac0a1f87cd7c068b506b22588f75304298bb379. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:53Z), 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/QZTB32540116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cb93c4d0288944018a8e961b3f80c190bfa7c6baab0e98814c717ec3d4e686. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:36:52Z), 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/QZTB32540146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432f4f16bfa09772241833960938232df86528968bcf29343d53353d0cb904fb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB32540130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a4763631c5b404b9705b40b3164cf4ff578f98edeb0e326aa3b8216c51d082. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB32540142.