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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b49ed2fe473bd97072dda2f4a8811c51edaf178a0230dcfec3c7bcbe6658cb1. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa792387-c3a3-490d-93a5-5c8b0d4aa475.json and https://artists.proofprofile.net/proofs/artist/aa792387-c3a3-490d-93a5-5c8b0d4aa475.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tears of Heaven (Original Musical Soundtrack)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c97064f0a084b87d3f5a484a3bbb541eb4f7b64fdb34676b2444e5b3c38ba6. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZEKE1928721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55d7a137f6e1106adc67c7dbaaa6625421e734d99426803c79421a7de05cfd8. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZEKE1928723.
Who Can You Trust? - Sang, Linh And Tam Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa789313f685980814b87a144f235a4e276afbe3a5d1ad88d1d2b6c424b3f369a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZEKE1928727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c459e869ee523b1964f823e1ebc531f0ee451d1090f70b75b00c370ebd65cf3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZEKE1928728.
I've Never Loved Like This - Joon And Linh Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15845f9b4d4b002042e9b4ebf26bb65f18cde402e1cc7674a68be0a4fb50e390. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZEKE1928729.
Can You Hear Me? - Joon, Linh, Colonel Grayson Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c483edb63140390cbffe20d66b447e0183202faf103af68aeb63073ee47adc4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZEKE1928730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa221ca2b44cef592f30dd8a10fa46e3b809983294eecc96fe910ae5760c17586. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZEKE1928731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa597e9b9f1ff4755ba9742d758ef3a1a26dd137b24a9eaae7482b65085a98b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZEKE1928732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bd7e8359dd7da3a9c277a35fd9a1f86654869c5654f01050d710b618116220. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZEKE1928735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10729efdc9901d0014bcba3187f9c84de03636a28e12fbda7462119a19d511e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZEKE1928736.
This Is My Confession - Quyen And Joon Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec78e7cacc2e7f56e9a8278fb5cf3470413e3b3a14e9bddd04fcea4dc4bf8f7e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZEKE1928738.