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 0x9a1d93c550cf82afd610dce37963d4e38d7a0bbed449feddd86880ae6a9a9543. 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/3487af79-7bd6-499d-b4f0-2432c1372f82.json and https://artists.proofprofile.net/proofs/artist/3487af79-7bd6-499d-b4f0-2432c1372f82.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 0x996c07025348b7682791bf028c5d657a84aea8a81c1c72092820e464e6e3b384. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USCGH0904308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ec6286ffc365f0dfb3608d1d610f1338f0161de8d1e989a151500c189388b4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH0904310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb951397373651a27c396635adf46fbb4d0c68e27055ceec3fecdc2451e9c22c6. 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/USCGH0904312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926fbf04ecbbe20c2f009baccf71bd759df2f56e49a105982fa892fb44d4ee99. 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/USCGH0904314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764cb08ed8fffb01c96d586fcf4323f8f7316ba6723a9487e2a0de815cfbf5cb. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/TCABC1191253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849e6a20e948b9da3aff6e69c68bd9c720a56dada6e7398b787e94aaa4d72474. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCABC1191258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0f0751d94d06719d230e07e06dfc039484a0b94b53eafcfade4171e488c51a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCABC1191261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a3f7cd6e12582761cbcd6c4e3e25553ee76d40e23abbb68c3986ba9b215146. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM2PV1654546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf741b86b70b6868ac24c0d0a009db2e5cc6e2ec7d4fa49d0872947c26610c83c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QM2PV1654533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19fa23f6fd3c4491a418daf280892f1ad04b71aedeed79f64be4b85794b4f10. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZ8LD1709591.
When You Say Nothing At All (The Voice Performance)
Grandpa (Tell Me 'bout the Good Old Days)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6bcb46f0b9dcba0b4345d8b1c2dc24821e38637c357c6fb942bceb05a748c0. 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/TCAHA2399990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8b83d758e5476312bca23822fca23341f611e59b69bc004773246c097fc5f4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZVQW2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd2ac3ee2afe179ab4e366ec0cf9dd7981563c800bc9e315c4d9556792e9aa1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZVQW2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ce08e9cf45e8e36cb6ef8c1db53f1af49d0c2f638588386b0707988c8d5c45. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/US6QR2300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ce08e9cf45e8e36cb6ef8c1db53f1af49d0c2f638588386b0707988c8d5c45. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US6QR2300120.