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 0x518315230abd8d0c09843e517fb9c1c028e10a8b4ba54482a65ec32db47ceb55. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e3dbd46-b46d-4e46-8884-c6984cc32003.json and https://artists.proofprofile.net/proofs/artist/9e3dbd46-b46d-4e46-8884-c6984cc32003.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Drum Metronome Straight Beats 40 to 200 BPM
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 0xbb222a09ed584d6adb794473a123fc56b3f9dca49c195d27f6584ae9c193f636. 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/QZFZ42488731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5841363d7ceba50b5ea43838bb8dcb3e250559ac7a9fd2e75b1bd2915ee510ad. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ42488732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7923088b74089d10f96510992bacb5df81591c23ba23b03db137c020ade6a1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFZ42488734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7d436e263dd92a55f0e2323e9a7d6956db37bffbdf0ef3e9873cc191e197bf. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZFZ42488736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a58c1cabe457dd0624bb1b006480875fa7f708bae3d46e28fbc1d24c23237. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZFZ42488738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc289e21c03be733f9c724d8ecc804ee168dfcd84de2afc4b8bc690a7d70b2884. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZFZ42488739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba934554b4173095a1bfffda60739278144ca6e43b0a41afe6d95d63a8663cc. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZFZ42488740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb718e5a12818b6e1da9d5ddc9c79de4fdca9457de766c90d38a3570e08f41c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZFZ42488741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd6c5eaab0b66097a956ac9aab0a8df60744d606bf27084ee338015da35e503. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ42488742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110c9e7e93956aeac6ff3ed308ff473faf7887834cf29e7ee86098f9bc1dc993. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZFZ42488743.
Drum Metronome Basic Beats 40 to 200 BPM
Drum Metronome Shuffle Beats 60 to 200 BPM
Basic Blues 12 Backing Tracks in E 60 to 100 bpm
Basic Blues 12 Backing Tracks in A 60 to 100 bpm