David Kushner or Dave Kushner may be: David Kushner (writer) David Kushner (singer-songwriter) Dave Kushner, (born 1966), rock guitarist
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 0xf3706527f8e8af16eedee63addafdfd3864349536f078e04beaac604fa56f532. 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/ca95d46e-22dd-4443-8964-c69eeb78b09f.json and https://artists.proofprofile.net/proofs/artist/ca95d46e-22dd-4443-8964-c69eeb78b09f.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 0x705122b1e8fc2b3b37ee85857c6010550826b972ecc552dd9c774800b54fa8f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXDB2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15144565aaf2814fc4b0fb8e8292e20bc3851067d3e03223980a2815bb58e5fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXDB2300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaddb31d943f9ac4cfa4657e3595d46416ffe733ada190ab05c03e6d4df5f4fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BEHP42400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705122b1e8fc2b3b37ee85857c6010550826b972ecc552dd9c774800b54fa8f2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZXDB2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22e81bb3b02dbbd0bbf78ba96914fea9b1447fc7c3ca0484d92cf7008410d6c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZXDB2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe59036dad18c4780cb357b9af63209c58fbe16a310b64a2a8e445c8130eb298. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZXDB2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fa32598ce7d1f45dc2f4a7d3b2f5de49f82ce1d34afe7ae967b170a8eabef2. 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/QZXDB2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23687b798b1e41b93bec505ade310194aa4ed94e20741fcccd42590ed248d66. 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/QZXDB2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d3d07237e5fdec9a6552ce8e3170eab53aa594a3ae5c8888f7b6f1f88883b9. 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/QZXDB2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705122b1e8fc2b3b37ee85857c6010550826b972ecc552dd9c774800b54fa8f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZXDB2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e74eb0db6c1bdea430e2ade2a769c19600bf8ecd4ed73579f8fac1625a87594. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZXDB2300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec33d00490250faeeba00f208bb11ea668d4558fa7890a5d7bfbe548b18aa68. 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/QZXDB2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3de65580b1c7c72f9de91c5b5d24bf9a9e38a420bb42d44478011a215eb678. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZXDB2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e316476d338ec8886a1e2620d6524a16387dbed1e4e618922124022fa4c7ed9. 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/QZXDB2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f295ebb061f4c9fbc4ac59631e765972feb7de37086315090f46097ecc0f702. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZXDB2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81121552145a7a001d00edd88b1c950d0ed6049e6bcbb7ac733ee896e374523. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZXDB2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec33d00490250faeeba00f208bb11ea668d4558fa7890a5d7bfbe548b18aa68. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXDB2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3de65580b1c7c72f9de91c5b5d24bf9a9e38a420bb42d44478011a215eb678. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXDB2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e316476d338ec8886a1e2620d6524a16387dbed1e4e618922124022fa4c7ed9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXDB2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f295ebb061f4c9fbc4ac59631e765972feb7de37086315090f46097ecc0f702. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXDB2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81121552145a7a001d00edd88b1c950d0ed6049e6bcbb7ac733ee896e374523. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXDB2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e52c68e4c50a2078c5e53e0550a1bbe1f6fea2c6baee30e0c725972a8d30d7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZXDB2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098f0e61a071258031339401b137ae76cf131256209b7265dfbaeb15c7ffe9a8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXDB2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66dc059bf8587cb81a04acc32555aabb38420620709043472a6d0770f229779. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZD5H2000398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77985b29e162c4e6b8f3829e98d1d6c98390f0ca28eefbf9bdf978cd0901f4a6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZD5H2000390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7ff55cab78d04396421a40a6b08336a8334e1f6e420abc4f0b883f6a7de5c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZD5H2000385.