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 0xdc28dbaca9efe74a1f39c9be3f5515f1861f0f685a9b089baf7332c109dd7e05. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c67f9103-d491-42c3-a135-b01e68e266aa.json and https://artists.proofprofile.net/proofs/artist/c67f9103-d491-42c3-a135-b01e68e266aa.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 0x28fb9b3a88e408ddba2bc9118e740e9bb89013d2300228e44ec17de4a2fb8fdf. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCJPB2415661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb531984292b836ae4e40e9b61be7af10b32c903a206647915b056e7621b529e6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPI2544345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4937e21d49f4de5e8b59b2dc6b5423a230d4e6c5108c96eb147e382d876403f0. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TCJPI2544353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978c2d6db16427cc6dfb32804ce9d207c452dbf32d2da85003d454961c6a245e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPI2544382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6e7a648f01dc0c9bae7dbb8ffe244585a8395f9c624e8f7b98ec6c6eb7dca5. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPI2544392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ccbae42756d68c2b96eb6c75c2f88c9c50254a7deaebae93e9a451286a6184. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCJPI2544398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd410424fab98ff7f0a377798cd818d291ec66b32b7d7fbbef1680e3ecba435d1. 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/TCJPI2544413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4876216d08045f5cb3887d3ed2fc2276fcdcea4f40eef0a25c97b091e66a0ded. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/TCJPI2581729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dfff148c7acabfea9ab386d029f1f924fe561ee4b02b9ea471d5414999c542. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:38:04Z), 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/TCJPI2573953.
SONOTABI (feat. HATSUNE MIKU & KASANE TETO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fb33157ab911c1d4d09083b8dea4029cd6750cf3f9df896d07a4fb04baecef. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPL2565185.