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 0x6e8f3daaf74e91ba19d3aad93a0f1a5e33d62185820569d5c53e887a00b8a9e5. 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/c5356b60-1dfd-4934-923e-14d6ac2486f5.json and https://artists.proofprofile.net/proofs/artist/c5356b60-1dfd-4934-923e-14d6ac2486f5.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 0x47e6fad8bd923e0f8130010b25444ed8222b9c64c890049d6d2a5359bc87f826. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/PLJ621300593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b154b239130250f6497d3c3e122ff13c427ed202aee36408dcb7fe9311f066. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/PLL911400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418b502196851044259f6f41b106294d720ae8019cf2c5c033acb8adbc38e718. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:56Z), 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/PLL911400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e4ace504647c12ad730f6428eee11b229be97df684e5cd627ce69a29e294b3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/PLL911400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fba80e64553d21340b60cb7543648b1b7e5baf807db8e1c5533b0d3fa568c6e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLL911400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee64b3f4692904037fbc87eea03bdf148713b466140f2d60649654843459811. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLL911400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dde059479e85b207dda1a779605366868904e4f205b8c8b06b78e95bc9a1775. 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/PLL911400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e21fc1ebb55e70ed9de6d606de67c6cbcef914db96bde06bc555df481ebf224. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/PLL911400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3b179597b3a5abfc78e34da39a3e06b11e1b367fc63b50f68ae5f0b22ef0b3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:22:46Z), 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/PLA880900124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092e8b7eb2024374b6a44e0886f83251417c8ea113e000e61660b105b179d02c. 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/PLA880900125.