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 0x27e5bb2478acbc1a3d16b710368f6eae3758ad30af4510ad998c8594b858f32b. 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/5f0ba8c9-4a16-4ec3-86b3-181385ac9bed.json and https://artists.proofprofile.net/proofs/artist/5f0ba8c9-4a16-4ec3-86b3-181385ac9bed.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 0xf85bdb62b2bb4428080eb9dd84cf135c00ff13a13169339e6bcdb210ba6c82e0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CH6541626997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e303f98b5f5f07c3aaa7b9e7b8407c727db9340dc8e4e185b886814e33afdc. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CH6541626998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2950f22661e08f6d475f859c1f6fb547bac46cd5e5174e5023c7facb07d57f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CH6541626999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ef7b85271b7f51eed1cc13ffa6436bd059499911d44b7d06965eaf537a8389. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/CH6541627001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53408cc0510d8a6a0763ec0221eba37e6f1ce9d104ff1a177aa5a98cc3e5b47f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/CH6541627003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7499081bff57838583e260e7182cd2d57d1d87b4fbd13e4409ac096b04a275b. 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/CH6541627004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6fe404abc5cc99c4873ce6f65a4ee40c393022343e5693b96b363976f75012. 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/CH6541627005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b0f6080bb34f84438a24c764f1bc4fa58b554002557d45944c8590c5358da2. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/CH6541627006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe511f921eb2719442143d7da10c9e8a66007533135015dac6207b069cff3b803. 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/QZHNB2148683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca4c875e9882a9addf1ea7392c17e34a6b4aa3993d876becd56fc17d5e12956. 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/QZMER2150670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2fbea461d2711790d2f69003a7ca03abb85928a188f84f040f1c114c3bf15e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZES62254318.
In a Persian Market, The Princess Approaches (Solo Piano Version)
In a Persian Market, The Princess Approaches - Solo Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1584d2450371bc0357afa40b20f29c7ee0a3af4a71cf98551007aa119b16f2b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6Q2219837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb992a630417fc3c43873c4d3fe23cd06e8c4fcd68e055bba90aae50780086ed3. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZHN32318931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8672fa7369de5ccc3b3e66bd8eacb16ebdbbc4923d45580a62c7c99026d7754d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/UKR6V2311429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b8f0eb45bce7bd05e9efa562b9556a2708360b63b18bae549f7f6a571fb43b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFQ2512115.