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 0xee8c11cae2ceb38e0564926017e7d3b745979b746f373b81398252604e328c13. 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/e8652977-8350-4aa7-875d-0f6df6c51c30.json and https://artists.proofprofile.net/proofs/artist/e8652977-8350-4aa7-875d-0f6df6c51c30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Prelude No.12 in E minor - The Piano Works ; EXO
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 0xb87aa74101964ddaa14653687e6084b81dc3d98613165d108ee869271911b288. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USE830916642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6b67a491fd0cfab65789879c3a3b90fb14314fd473b52244f5cdbfd5ae5fff. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USE830916643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc575a4603fc31608f310ad51611b192e3c0a7dbc126ab5d71c269d28825d86. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USE830916645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4317b0ad2e0d3cba896aedf452f02bd5b89d835382448764c604180ae390a5. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USE830916647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e320526efcab84c8dcd2f3be994d6c1a5e84035763d8dfd38b8c8b9addb7901. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USE830916651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9253a5b437f6bc377436f1bc96bbab1a67df272196c7bae3f29ee9254166e163. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USE830916653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c651c3380cfe70fc4345bba62d87fb9dd267762fbd6d3e8858a20f0975a25d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USE830916655.
Etude No.5 in E major - The Piano Works ; SHINee
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac74b00b19b6bbf048ad2afc80c1a7566b8e04b8c07605b0fbd583b55f763e4a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USE830916656.
First Step from "Interstellar" : Piano Solo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053e5580c88fe5b8012f28a8a8fc019503d3b755423267d36574de17257ec85e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USE830993819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815ab7f3ec854cd721d0e32100e29d9ee62cb381cc87eb77900e0b5cad280606. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USE830993821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60070a306e38b3235bfe9c123af54b3d2b0b6a5ae8b7e36c2256feedf67536c. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USE830993823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda6409381ed2b9034815d3ef3262d27b709714a182509b665b10afe6de36131. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USE830993828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08ee80a3be150b16f7b5485292f35e6e013ac8cf079eac87932f1852112758f. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/USE830993830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0783fb17c6065c3df40d749211b154972e322c0fd5faf882a3de6fa28f2107e6. 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/USE830993831.