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 0xea5579f3005ed22d656805dddb4952668bcdaf20daa3583a881ba1505ce7dd6d. 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/7bf001ad-dbff-4c99-8a34-e579deb2b819.json and https://artists.proofprofile.net/proofs/artist/7bf001ad-dbff-4c99-8a34-e579deb2b819.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 0x313eb033aa1f91fc2306750e5929c5ed227909c4a8894ce25aa10ea7dc343261. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/PLC062375913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fe0270b23458135938b259febddf9472e22063ea9d2e2baf05950aef471d8b. 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/PLC062376257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36db45f2dc0ec6df771ada011c341675e713df418b6bf55c33e6ae653093d4d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLC062376258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc6a73d68ad491903c0343bfbbd62e3503845704d8e0b9b0ba0f10c9adfa9a9. 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/PLC062376259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cf1bc33dee01c3a58c8855fe7c7b8e1913bad1190824a145965baa8fd4564b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:36Z), 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/PLC062376303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87732fa9c087d829e9895eefb48b102421642cecf657bf75629d2ae43abd49cd. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:55:48Z), 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/PLC062376551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddd62b896228ec6aa3a3ebdb7a088099e1f207e7d300b3a6ad7f16ce4835f16. 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/PLC062376552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9988181f6cc904dab0e135a249f6b141421d9a61d84f1fde5d62d4b9ad5f312. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLC062389150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7209deae9aaaad4d031228addddeabb3828438f63da3fabae84cbb4aed495747. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:51:46Z), 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/PLC062525702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645b740e2dcce574fc6f10dfa5ab6566374dcafa953abf08b001afcfa87fde2d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:52:24Z), 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/PLC062525703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ad55b4ce79692d578aacf8be39e516cfe04f8f8f3c30dd52c4ba809a73f33c. 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/PLC062525704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968706ea4eb50ca2aa2c451c5b63ec94093b46623968ab1a0ad00634f536a07d. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/PLC062525706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c83ecc5a9b40b078be5bf0f45f108e4919d467b011e9d93462af21d43b68fa. 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/PLC062525707.