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 0xa8463196691daaf105d581d8eb9b61f61fb40ca223160e28af2810f5053dbcb1. 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/05469b03-9b8a-4a31-a596-fcc88924aa9b.json and https://artists.proofprofile.net/proofs/artist/05469b03-9b8a-4a31-a596-fcc88924aa9b.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 0x8791fb2789e61f25342bf527501a9ce72b543369896ca56ec76015e0ba6b1538. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM4TX2062195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e865cbf2e2db34a7af293357b38493463bf4b8ce51867b06b73276ce252cc85. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QM4TW2064689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e3f1967ec2bf9779542cd9a40745edb06c20ece60d3080eae1282c9dfd31cb. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:47:52Z), 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/QM6MZ2082960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b3895ccd34c3002910e82f7e358afe392fbae5e7c2407daea4fc8167d99ad8. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QMFME2100985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5123fda2f30b1bcfa11677090aa2a36d13f38ea54a67f63a447c63bd9b94be0. 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/QMFME2101004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f09e7ff0ac032f34627482ca1621619a1d12364854977674e5d6ef0b9979f97. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QMDA62101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ed1759bee51830192d6ea4b45197a5a022ff25a5e37165ad7b05e2f74de812. 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/QM6MZ2220351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed96707826b0aa6075f7981a52156757346443b63e3802ba2387c3e7b6da8a97. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DGA0S2458467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11560584e6f27a68c2b29de1d03452be30b07e0c436bae0a86cfe37e712aa911. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:47:56Z), 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/FR59R2392482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7ee67619434575a67e6adabc97f8222a42bb8faae6fbea82bd327fa4e3b761. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/DGA0R2337369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3730cbdc387ff0d7cc06c6b24ef3261b6172ad6cea7bd83f5684426a67e8f0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR2X42563578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9816b187a9483dcaa1ea3d776613747e668fd58b4f83ff09f0e731645db72fb5. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FR59R2544059.