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 0x50feb8c5da91884cb9bc4932862504cedaed26f2ce5cdc180676801a71591750. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cabf02a-f6c0-42bc-8f21-f8fca5807c21.json and https://artists.proofprofile.net/proofs/artist/7cabf02a-f6c0-42bc-8f21-f8fca5807c21.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Classical Piano Lullabies - Scandinavian Edition
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 0xd6e6d61fa16c6cae4ada480115e9005809818294c220e53d543bcdf04bf8feb2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6MN2000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc016b61668c0abf2ad00ad95c9277d25a3b563c85bc2a37f6c3eb753457ae968. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6MN2000807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b46d604f5eec8ce8cff86b7449673d9cbd354093a32d2937dbf06d69d3b3cd5. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/SE6MN2000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea158bf4bf48f7cbadf6434a9ae90a3133b62ad4c463707505b19cf66d4b8cd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6MN2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731cbda1d3129584a973d01ff1849cbeca8bc11f71dfc76b42256589f0417842. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/SE6MN2000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9b04106733e799ffb610f2efc53d4f254cf063138f499b06575fb7a3df397a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6MN2000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cb36338d12457e7f4a1b2b4d93acc38ac5e2070586b9f6e7415d8e8854c657. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6MN2000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1828c25754e86a71bfc14d6efa531f5f0185d36fa29610b7e2344d45ee56cc6a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE6MN2000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33f9e79402aa957dfdc9709dacabe20fef4144c950c8c8f767d558cf02b5f9a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6MN2000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c650bb298e5061fcd0c3d6f90b5fa0a67a636bd96b90d904eeafc8563b8a06f. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/SE6MN2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90576bba4ba42c6e9f2c3f3245d093aaf9f369995525b2660dd2d899eb0bfa0c. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/SE6MN2000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929906eebc14334fa13aad3f07078cb546433618551346c2316093b800e18cbc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SE6MN2000210.
Jazz Standards - Lullaby Edition, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e358a0496dba1534c8c5b965941122fa8323c4286baf888a2b85abd48f512b4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US23A1545098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed8702c119077bb41d3fcf2aaeee00bf53a11ca16d690b22f535f0255fdb9f6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US23A1542093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7232fda09f12ae1378ed1f566ccd18892a773f75f197e845c481029c0af20182. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US23A1541948.
Songbook Classics: Lullaby Edition: Vol 1