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 0x002749e66997762d128aef8b0d7e61a9d1ea8c89794d934bb268a4b9fc42d7f9. 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/66b0a090-5ba1-483a-899d-29f364218d31.json and https://artists.proofprofile.net/proofs/artist/66b0a090-5ba1-483a-899d-29f364218d31.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 0x610dbd5e299c70f1c4cc8b407c69cb98675fa6a627f41488a639b1df5fb0c5d0. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTAT2214007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9f1aaad1e6c80fd8b254e70110db462d3a591554777ea704e6bc3f4aff1975. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES62344603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6845fd1fe49104ca4c8dfcba1b08154e1fc8e3dbc0678cff782dda7d2d2e69df. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:41:48Z), 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/QZK6K2372286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbe8634e4b4c830bbc8fc52dbd19678ed2c167c4bf586ed429eda0bb106b4af. 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/QZMER2390726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab778df99e4f61bf5ba6940f1c4f8fc8d5fc50a173e31cf57cf6e4aa2601b9c0. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZTBF2385541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd72ece695b3c62a8ea41cbc4b12e89506310a3750ae1a30109126c8bd0e9b8b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ42412511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6c0587a12885cb4e98b8f817f5c2c05e69b10da2f884a2e7eca3b975705a46. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:11Z), 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/QZHN52487883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4fbc1cc8ecf95b673962c4f86a9505e8e71adc7774e834f75513a4808cfbf7. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:32:55Z), 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/QZMEQ2491212.