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 0xabee1a4f461e242a56c0eecf1f0fa3668ad606a3972c27beb63ed30614804e19. 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/c1016036-14f0-4131-830a-13274fef7224.json and https://artists.proofprofile.net/proofs/artist/c1016036-14f0-4131-830a-13274fef7224.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 0x800cd03857bed176a83eea910a7c78a256fdc1ca3f5a2a2f85ee3e6bac26ed57. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZDA42563978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d990313865aee5d0f6a7914ae75ad032d0aed221f133d108cec52e90dddc57. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZDA42565540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd87d83bedd437f04589799e2772e12584d9600bd52c033daeadedd4c61818a6. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZDA42565541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf66e600e5ef31af8aa86caa6fd38f17743d247c13867a7a39208cd7fb8fa42. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZDA52545989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaec40e8a0a7b371023bd685d2866c1004d52b36a7412494c31738c4d52257e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:25:54Z), 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/QZDA52545986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de00822edf7697dd9da275cf122dfbc0d9c200926e0508860144a7faaa7fb07. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZDA52544955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe072f683dccabd66c2212a30715852de069ebea4f2f532122eb4ccfa2abfa6. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:30:30Z), 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/QZDA52593176.