Christian Sylvester Sands (born May 22, 1989) is an American jazz pianist and composer. His third album for Mack Avenue Records, Be Water, was released in 2020 and received a Grammy Award nomination i
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 0xa638ecd1846fb2e066755102d0993e0b185be6bd5d74db022230a768b78b566d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3fcd2cb-a4ac-4ce1-8166-0f1ad0690326.json and https://artists.proofprofile.net/proofs/artist/e3fcd2cb-a4ac-4ce1-8166-0f1ad0690326.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Take One - Live at Jazzhus Montmartre, Copenhagen
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 0xeefbc2f5f8175df1c59357a5d728e312ed6638f73875827a226957ccdc8d3300. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USMAR1814305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc8b9803ee50745fbab7418fa180cacf4ef1d0f5fca220588789c0c949e8cc9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USMAR1814308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37430c95428059d0d6e0d18c97787a6b8c6b1ee323d5a43206cc820755bbfee2. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USMAR2017002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2467cc4cc02d81b41ba8f9b35f06aeefd6b9712aea403ce9a50d41d88721b78. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:22Z), 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/USMAR2017003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae371b336a5e77f9d88e5639095fa127f2b49b323c39f70a7e82033bff70b129. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USMAR2420901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690c9a35a5dc6604b5a0fdc61bf55d431d4390da9440538990671061b6eeef89. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USMAR2420903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a13832e6812886ad5199ad84d4ad20f252667c0b0ad1b87ae50b432466b7344. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USMAR2420906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33a14932108d1bfbbc4a9b7dc1c226554cfe3102f162e18a92cbc44d5e9dace. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USMAR2420907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e70f63c28f0ee2ff7e6c87e3aa11ebaa70cb631df447fe0cae20170371d72b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USMAR2420910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee2810bb6d709e7d6495f4f9a036742762e558151f3082ed2243358ceaaf538. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM9Z91900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf02208c0d51aa4790808016ef760a406dfd1bbfa9ed94c1c42813b5fedf8c2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM9Z91900053.
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 0x9e6d39e63a67e48a9cb6085cb010227b7c49428527859bf809e697a889966516. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM9Z91900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d27ce3796dc7996c29ee390eaed2b3ac910507fe9fd18816137ed798567bbb7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM9Z91900055.