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 0x04eed0e2817e8e4411a61548e6ae1a3c69ea7eb3f679c95466d8ac864a140e67. 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/83488786-7ec4-4dff-9561-343824e6bee7.json and https://artists.proofprofile.net/proofs/artist/83488786-7ec4-4dff-9561-343824e6bee7.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 0xd2fc6677719f12b13e3e9a10993abd7c9b0a9efc00d0f8a5e7acce46f7e1ccbd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHN2399954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b54446a28bf8baf33cd7ec8fb11dc57976cdf9093c3397be667277243d4ed0. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHN2346166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5695ec60f0a2798f41e589ebeb727f8fd80ee283b4f4b779df6f408c6fc2ef5d. 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/FRX452521362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a14684b4c959a8adebfc904932f56b8c28db0f1b4d9a2b08ccddeb1a3a2706. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:08Z), 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/FRX452521363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d85cbff3a83e5c43ddd1852d6503d367843c6919bdb7a7d3f168343dbf8057f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:03:54Z), 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/DGA052567261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9ccb0adc1c2d4f86a3467bc51d51a2ded4ee6e820eb8187ac880d46b4eaf2b. 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/DGA052567274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da485ef8f0d433335ffac9f10fd083232e2aad24167d464535e3ef7347425ed. 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/DGA052567201.