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 0x29f8572ed89dd46b291a4dfdfb4c562283047e3b83be88a2e82007e77be6690a. 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/c08f1c71-4a40-469d-8682-282e4d5bb67c.json and https://artists.proofprofile.net/proofs/artist/c08f1c71-4a40-469d-8682-282e4d5bb67c.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 0xf80c57409eb4fc2cf3f61d1974853e2d288db62ad5ef5849224ccf527984a3b6. 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/QZTAY2403042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd1083d66b4ae75d151558f460a89d05c36c78bc92a3647f9b8d15786194718. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZFZ72216741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83b45f2b4978f1448c4734463e70ff8f5fd9c155617414767468dca5c522b4b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDA62404216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9976c97e3c6c1a33d37dfbcaae6a04918a39bf551e3c040cfcebf12e34a43542. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZFZ72388861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127aa7f58a82ea03a408d716278fd59884ad80ad7e502a9cf2a814c157146799. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZK6F2334362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fddb7e72ee4f5787b607257d009969bc2beb07133b421d88ef7d4bc37c3ef6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:40Z), 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/QZFZ22484180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a673d4943753d70acab8b7df84a26dbea42551abc5eeb8601edb77d09f2cec. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:43:52Z), 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/QZHN32449163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019ebbaedde521705e425d47ca8bb7d4dfc8589791c674076209bb12f7aaac69. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHN72471430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c7ae3aa80a82d9e96950ab635322222f7034e516a243596618cc5e322dd5f5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6M2419588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58b46472b033f826076b0d01daf03d12bc1ac5afadbada1fe6b3908e820d957. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:08:31Z), 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/QZNWU2436444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88929042353d2392696bd9022241f3417c58e3287c0d8744b0d9d9fb706d8290. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTBF2498684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f4ce65b5b8566bf3d522e46c914976efe561ab73b31485f79ab9f98f354bba. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHNC2536653.