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 0xaa188fb0546e87921151ec4e68e9fc8462bd3e1cbc662d1b87a7088152ac59b6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45de6484-88cf-41fe-8dde-5b68c1fcbecf.json and https://artists.proofprofile.net/proofs/artist/45de6484-88cf-41fe-8dde-5b68c1fcbecf.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 0x3ef5f82927f7686b68bd6c697aae7454a8e848e975357d0de3e9d9c520704576. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:26:08Z), 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/SEYOK0934901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef1358645df38407149333be175a31102eb5d16265131db6dcc384b98c8cbed. 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/SEYOK0934903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf38fdca12f530d578e9bcf7e31fa766fb8b4f099791d637aa6374777592291e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SEYOK0934905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba96804158d7834f65ce51d5592865eb8e828e9ac276d4b75737744467805a5. 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/SEYOK0934906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb51da8e42b036d0f7bffd1ba42ab5fadd33fb443d61495dd76f9ca76b7232cd. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:25:35Z), 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/FIUM71101392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698d73158d06ffe452d0964bcf18b694c79b3ebb49fe904bc336ed1a36553d77. 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/FIUM71101398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe02f0fc260401bf23b4d17d63ef6b7e3465fba56916cde8741ac101f52acae0. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/FIUM71300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a19b5d98585c1b8fa50fbf549aad530a5ff3fa68399a33f9e10c756e75157e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FIUM71300201.