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 0xfa134a3062e9148d97279712f48dbfd4b7db470c41fbeade00223ee885913542. 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/fd2d9eed-3751-41e6-8462-08f402c863da.json and https://artists.proofprofile.net/proofs/artist/fd2d9eed-3751-41e6-8462-08f402c863da.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 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 0xd9758b8695becde43f116f0c01dfd80400d463d2bb7876e6719a7ac7f041c1d7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE4MF2000317.
Grey Skies Featuring Oliver Wickham (Pandhora Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cbb4ba064556100769f07842fb415abe4511420b1a590f659820b901b4d498. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE4MF2000326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cbb4ba064556100769f07842fb415abe4511420b1a590f659820b901b4d498. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE4MF2000326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bc6718bc71b8e9f8982297f113c3abaf996fdd2468cf1869101c5bf1b08f2e. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/SE4MF2100331.
I Still Think of You (Return of the Jaded Remix)
I Still Think of You - Return of the Jaded Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457d9959a17e4f265a7fe412b59d84cfa5a3f92afa0489115df56c821f87a15b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH3132216567.
I Still Think of You - Return of the Jaded Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb504d8326f4202b45a6a561caa8ec71741fd41ad82224300f5a5c25654f44b26. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/CH3132216568.
I Still Think of You (Mees Salome Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ecb7cec40e4229694147fe1f91a225bf156a4810d38508558a84535186e274. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/GBJAJ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac7607fbd256ce2b26e6d599b8a8a2034c745236d2120bc898847a22164bad1. 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/DEW872301173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a165e43a40fe270f84807734cb29642dc86c501cd0e2015ca1c222d61908dae. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DEW872301172.
FYH420 - Find Your Harmony Radio Episode #420
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66ad59adf6c7a080f59c581c32784b913418567510c81b77aade83d622b6bf3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBKQU2495959.