thumb|350px|Ostinato from Radiohead's "Creep" features modal mixture, common tones between adjacent triads (B between G & B, C and G between C+ & C−), and an emphasis on subdominant harmony (IV = C in
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 0xe98a174515de346d11bb6340151884eb6aea41ce58c4f7bfcc8f7eb34f6ea777. 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/6a3c8113-074a-46c0-8853-c46a60769245.json and https://artists.proofprofile.net/proofs/artist/6a3c8113-074a-46c0-8853-c46a60769245.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 0xbbfd29391ae71f0c6736815616f244953cc5e855a0aa98801e359bef8fa25266. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEN2227591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16d60fadf2ed78459c80056cca6da96bb6cd4d9b6f794fe160f52d6642da9d6. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMEN2227235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c70fea47b51409177d323eee105641cc4e232606d07be615136c528274a166. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:45:19Z), 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/QZDA82448763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d50c4713186449a3e78e1efc80328c73222d816c5655773709db698438dc691. 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/QZWFF2445996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d202d0150573953836d79f32303db9bdaa6ac874090e45fdc77266c84971127. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNJW2546088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f2930216434bdfcf2ef4b9455fdfb03642b7cc4d648aa9d9c086403b71a662. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJZ2501385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4838f7c0e30f656fa6e8f41bda6276fa3b8ddca610d624e4d13f1d6705dd99. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJZ2503994.