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 0x48e3e0774664e01fa86b25f5cb6f4a137c048509e96149ebc55952b81bb6434f. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93b5c4bb-1cc9-43f0-a073-7ee34b305ac1.json and https://artists.proofprofile.net/proofs/artist/93b5c4bb-1cc9-43f0-a073-7ee34b305ac1.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 0x087b26b89c502c2f0b6f168231b5fd48369a494c7ab7c2abe45f9d8eaecf82a3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN82371347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257ba172e0671c28b9e7ade459c55c9304b39ece04394923d797af28fa3d698f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:53:56Z), 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/QZHN82375266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea2a3aeb805c55f1468f21428b3914714546ebf0bece27a37fc91341f47da51. 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/QZHNB2335944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8175012e1a5ca93bc98984d38fb8d651d9606adc792930e11df8c10a65326159. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTBD2305431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71028bf3ee910e88c3f9225299e34b886df7133bfb1adb55e3d2211c6ed1d17d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZK6J2407810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559e183f0d4ad61853090275e0fbc203cb76045fa4c135bd07b09dbf5933b15b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:40:45Z), 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/QZTAT2479635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2696f3e637391dc9e4e440a3e455dd2db9ce92a339eb6d6c90012d5005ab3654. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTAY2417296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43275bcb824ac93a47a013f8d7068eb07d432c6f28eada5e0124c5b7d081a970. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB42417254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b788d58b2e6c7ec5733e0a41bd24b8749e07badd0de7d2511f3ce60322bfc32. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:05:27Z), 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/QZDA82557037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b3d44d502fbff2694c26ef604dc01d0592f1b7b0dc0fc7780e5ac5f846a298. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFG2579566.