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 0x588bd40bbbd327935d503bf54a88f12b85c4ab328ea28e4788eb13578cd64ef2. 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/cf87bf8d-fc7b-477d-99fa-79a2cac49db3.json and https://artists.proofprofile.net/proofs/artist/cf87bf8d-fc7b-477d-99fa-79a2cac49db3.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 0x1659da6edd931a307d905b480471e20053c905f3dcdcc9c78a57d7e335316bbf. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:05:14Z), 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/USERN1010313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1213e8791ffb49a130c347a644a11377c90de4258e1e0fb9b3627fb5d9fcce0e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:32:26Z), 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/USERN1010314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fb64be86bba527ad9a0d15f149b7b3f4c77b2c02df8717680764e05e7085d7. 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/USERN1010315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc044455e2a4fc96a27605e65c4c3adfaeee548d8035e195515d2951540bad804. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:52:07Z), 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/USERN1010316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77778c742a01093c42460314ac00380dbd6914f240cca503312b12c942389eb. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USERN1010317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa976121931f0021bdcfb012a3294dbe9bf671a733502c0efbe1b084144f569ee. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USERN1010318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528e6ec45f86723b58f9b3a21171d6ce46865f1148de834385725ab342889d9b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:13Z), 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/USERN1010731.
Adrift, Beneath the Listless Waves - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabc3bfd1448d81fce4603cd54dc17ceccaf2fb8fab10d013f898f15248c5b7b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:35:14Z), 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/USERN1010740.