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 0x66af128ae67762fa14f6502574d4d848fd12ae7af2007de14a539f25e04c3e80. 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/bdac0c50-7255-488e-b067-b8ca82dea4dc.json and https://artists.proofprofile.net/proofs/artist/bdac0c50-7255-488e-b067-b8ca82dea4dc.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 0xfc8342113fd6aa2700b2776bce1848ab815bb053687288c96bc03db5d0796a0f. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZDA61903602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47acff8b181d237038f052cc1c454b60fc6e3c014e8c5329ca203f2e7a61b8f4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR26V2050155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b822aa298cb5e766daa29ba309fb089670b816dbc0a0a7c5f24e73f9fe27389. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFZ62271275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf960f8101f5ea1988a151513545be9d6f96f41670dfb1be80af2b37ee00c72c7. 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/QZFZ62271276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7884a2b22b97b434a94e04139bddaa81244b4232d3392a77109ea32fddd24c. 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/QZFZ62271277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9666ca08696004bda52001fdd8eccdc30c9671d78e30a2abc2f7ad76d443cf24. 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/QZFZ62271283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50d55a37d9f798665faf7e2f2ebee913c83e32cde84a672be06faacdb18a65d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:26:43Z), 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/QZFZ62271286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8dcdefa3523d6bbedc5907cfda0d29b157d39c1ec318c01c6a9fd2b9cc73fb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBCPZ2221142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a41f684e82de589146008854c0e7e5aee466dfd2ae633a3de6d227112b3ba9f. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBCPZ2321685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cd2111ac6abb31e2fe73762f329290982a59b55e11c5058ebfedf8e48b666f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNWU2344474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeed60451c3aa72d921ba6d188f7be1f98a204f62bcaa7290c2a8362ca45f51a. 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/QZES71812810.