David Six may refer to: David Six (musician) (born 1985), Austrian pianist, composer and multi-instrumentalist David Six (artist) (born 1968), Canadian artist David Six (basketball)
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 0x5fba0277e90b6ccf8b443e786f7966568d04650256c2f188264163f19ab6cec3. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8fa74de-e4de-45f2-b654-a9db9599695d.json and https://artists.proofprofile.net/proofs/artist/a8fa74de-e4de-45f2-b654-a9db9599695d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Roots Revival Series - Ashik (Live at Odeon Theater Vienna)
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 0xa5e1d1e02b99b70fdbcab0e8a99b03461629e42bd82d3fd52d1dff9f867adf15. 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/QZPJ32141813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a4e8d7b69470cfdf04aca45e16c55e1fad58f6bb9366d88e15a2966b70afb8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPJ32141814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78e8e5e85e56e50c5855caf5f0837906abdbe2bec809c6ad92f4001f6af49ab. 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/QZPJ32141815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a3078272903c249cfd60c13fa121083cc59a646448a42062b71925ca49cbbf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPJ32141817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94997209dc158a2488239e1dce539bd2cf5ad5dcdeefbdaab69f21681b4ab7a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPJ32141818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f152f3970906a1fcaad73d391123292c3d7ae268865436e61e6028763fa7cd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZPJ32141819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd52be99a7ffec777a1ff2ad43cbf0e8045115b2b743a5fa8b85ab46c2c9ecb. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZPJ32141820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba13fc17a747fc5b6e8c5119019f2568e52dc5afe1d1d8c98e41bc9e39fee5c3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZPJ32141822.