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 0x0f91bb64bf536ad958c405296c6a012c8c78216895ed4b256bbfb36e551efd8f. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a781ca44-83e0-43ea-935c-49ea8bef52c3.json and https://artists.proofprofile.net/proofs/artist/a781ca44-83e0-43ea-935c-49ea8bef52c3.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 0xc0c21c2644cfe7299bf7ab7c4939bd73aca496b0922fd9e5314c54eaac0b2a61. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAHM2361042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a93a0e772558d084a9cb7248fcc07607844c4273eb13e6d855451e961deba63. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:41Z), 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/TCAHU2411789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabdd9cc086d8d2cb298e1b2404b7d3023ca69eb97f1944f7cde67b1daec2198. 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/TCAHU2411819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28584d49d2dc49c7fff571056a423ba3adab36d44030d6a6a69b8d0ba0738adb. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAHZ2480854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3433cad45dda148d01c6bece6fbff86005ba032fd334f96a2d47906a69a9ebb7. 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/TCAIE2473595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92c5ac83c8f1931e253ec55eb9867a2243a038f5719ab56e46c8c837791ee11. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCAIM2446896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcc1b732bf9952f378a9cca87b1de372bde7dad7df896d73c563f0d9e13ef80. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:18:52Z), 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/TCAJR2538073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419ae73f403a0295c640e6a60fdb505d03fa7e15c41004c3d76317142b73f305. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJQ2539451.