right|thumb|200px|Christopher Seufert Christopher Seufert (born 1967) is a documentary film producer and director, and photographer based in Chatham, Massachusetts. His production company is Mooncuss
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 0x4ac64375633a8fb44ad7c39d1d0fc100638d99897fc98fcb8d3820cab2b19cd0. 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/9c31a054-7633-4ff9-bacb-1e4a33953b18.json and https://artists.proofprofile.net/proofs/artist/9c31a054-7633-4ff9-bacb-1e4a33953b18.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cape Cod Soundscapes, Vol. 2: Morning at Chatham Harbor
Cape Cod Soundscapes, Vol. 1: Ocean at Chatham's Lighthouse Beach
Cape Cod Soundscapes, Vol. 9: Ocean At Nauset Beach
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 0xced0fce5a71479c3c56df8bf2c38670d0f92c87faa9cddf03dfa9ac0b3c754e8. 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/USCGH0927124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacfa5f0751078f3a3d0f127073be114536c889aa719fc075163ea0c6660bdd7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USCGH0927125.
Cape Cod Soundscapes, Vol. 10: Song Birds on the Marsh
Cape Cod Soundscapes, Vol. 5: Autumn Evening on Pleasant Bay
Cape Cod Journeys, Vol. 1: a Meditation in Bells and Wind Chimes
Cape Cod Soundscapes, Vol. 8: Ocean At Red River Beach
Cape Cod Soundscapes, Vol. 4: Evening Spring Peepers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765cff21074ad99d55a58db3f53e17346d1f9c50c6efe0abc69650fc8da1df07. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USL4Q0869758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d596f8451b2f8d3fadd4e35a6c345a1a839ca8875ec633e4960486b0c81e98. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4Q0869759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563dcefeb95dc2372bab4c2a83a07726ead5f7aa333efe5f63113b8c80a58871. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/USL4Q0869760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03725e0948906ac723db3370f9b88682d7f10cd11da55dc27d2ff6f7ebbbae6a. 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/USL4Q0869761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9ca2f5144312c34da93c60e93abaa66befd178d2fa0ac81fa39031029234f5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USL4Q0869762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb7b9ced739fd538827591f3c7a705ebe902d15bb5bfcbf54022fca1bb4e5b1. 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/USL4Q0869764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb94800ab19bda58922d9d5ce2b2fe96bc59344564256e84aa035ce3b50d6f2. 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/USL4Q0869765.
Cape Cod Soundscapes, Vol. 7: Waterfall At Stony Brook Mill
Cape Cod Soundscapes, Vol. 6: September Crickets
Cape Cod Soundscapes, Vol. 3: Hardings Beach by Moonlight
Cape Cod Soundscapes, Vol. 11: Sounds of the Cape Cod National Seashore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f26a5f41cbea751d16a281af89ce7ec85921378405e43e6321f2efa186d9ff7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USX9P0903282.
Cape Cod Journeys, Vol. 2: Firefly Evening
Cape Cod Soundscapes, Vol. 12: Ocean at Aquinnah
Cape Cod Soundscapes, Vol. 14: Ocean & Buoys at Nobska Point
Cape Cod Soundscapes, Vol. 13: Ocean at Madaket
Cape Cod Soundscapes, Vol. 16: Ocean at Wellfleet
Cape Cod Soundscapes, Vol. 15: Henry Beston's Great Beach
Cape Cod Soundscapes Vol. 17: Foggy Kettle Hole Birds
Cape Cod Soundscapes, Vol. 18: Afternoon Thunderstorm
Cape Cod Soundscapes, Vol. 19: Gentle Rain
Cape Cod Soundscapes, Vol. 20: Beach Bonfire
Cape Cod Soundscapes, Vol. 22: Ocean at Lighthouse Beach
White Noise, For Sleeping: For Looping, No Fades
Rain, For Sleeping: For Looping, No Fades
Cape Cod Journeys, Vol. 3: Real Wind Chimes
Pink Noise, For Sleeping: For Looping, No Fades
Nighttime Crickets, For Sleeping: For Looping, No Fades
Ocean, For Sleeping: For Looping, No Fades
Fireplace, For Sleeping: For Looping, No Fades
Cape Cod Soundscapes, Vol. 24: Summer Morning at the Cottage
Brown Noise for Sleeping: For Looping, No Fades
Country Stream for Sleeping: For Looping, No Fades
Cape Cod Soundscapes, Vol. 23: Song Birds in the Pines
For Sleeping, Vol 5: Rainy Day in New York City
World Soundscapes, Vol. 9: New York City at Night
World Soundscapes, Vol. 3: Hawaiian Dawn
World Soundscapes, Vol. 6: Morning on the Morava River
Spaceship for Sleeping: For Loops, No Fades
World Soundscapes, Vol. 7: Winter at Beaver Brook
World Soundscapes, Vol. 10: Afternoon at Dingo Creek
Tools for Yoga, Vol. 2: Background Ambience for Spas & Meditation
For Sleeping, Vol. 10: Space Station Ambience
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef2ff19c4cefc79b2e9e9f4cb719c88177f278b300d3346f64169241d421eed. 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/USHM92029946.
World Soundscapes, Vol. 5: Hawaii Stream
World Soundscapes, Vol. 8: Ocean at Rockport
Tools for Yoga, Vol. 3: Namaste Entering the Sacred Space
World Soundscapes, Vol. 1: Iceland Waterfall
World Soundscapes, Vol. 11: Train Journey from Modrice
World Soundscapes, Vol. 4: Hawaii Waterfall
World Soundscapes, Vol. 2: Iceland Stream
For Sleeping, Vol. 9: Spacecraft Sleeping Quarters
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee93ba827ed32561da56738b9cf04b2eec2d8afbaffaf165c94a3b8e4ed7df1c. 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/USHM92029861.
Cape Cod Soundscapes, Vol. 25: Ocean at Forest Beach
Tools for Yoga, Vol. 1: Music for Guided Meditation
Cape Cod Soundscapes, Vol. 21: Beach House Fireplace
Cape Cod Soundscapes, Vol. 27: Summer on Nantucket Sound
Train Journey for Sleeping: For Looping, No Fades
Cape Cod Soundscapes, Vol. 26: Ocean at Ridgevale Beach
World Soundscapes, Vol. 12: Ocean at Rhodes
World Soundscapes, Vol. 13: Colorado River at Moab Canyon
Spring Peepers for Sleeping: For Looping, No Fades
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3df4d5a3e56d3654b6c6bffdabe80efec4bda5bb4ba30830ab60684aace8744. 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/USHM92094989.
World Soundscapes, Vol. 20: Ocean at Isle of Palms
For Sleeping, Vol. 16: Spring Peepers & Crickets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fb228ab2f4dddd77a4ba3ec287d9aac20e44e80e544ec15cc483d3c29b1e82. 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/USHM92095000.
For Sleeping, Vol. 13: Snow Falling Ambience
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc3873b72e80f22a2ab6a562fa48ec56709aba370ddf6ad296509a88274829c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USHM92093324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71557b5a5f8c87f888c3d5633c7ec56d2f9d9f5c39cdec0549bda0eadda801c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USHM92093325.
Cape Cod Soundscapes, Vol. 28: Dawn at Stage Harbor Light
Cape Cod Soundscapes, Vol. 30: Stream at Paine's Creek
World Soundscapes, Vol. 16: Ocean at Santa Barbara
World Soundscapes, Vol. 15: Glenwood Canyon River
World Soundscapes, Vol. 22: Ocean at Santa Monica
World Soundscapes, Vol. 17: The Bosphorus Strait at Istanbul
Cape Cod Soundscapes, Vol. 29: Ocean at Chapin Beach
For Sleeping, Vol. 11: Airplane Ambience
World Soundscapes, Vol. 21: Ocean at Santorini
World Soundscapes, Vol. 19: Ocean at Grand Cayman
World Soundscapes, Vol. 14: Wind in the Aspens of Utah
World Soundscapes, Vol. 18: The Mersey River at Liverpool
Cape Cod Soundscapes, Vol. 32: Gentle Waves on Cape Cod Bay
Cape Cod Soundscapes, Vol. 31: Paddleboarding on Nantucket Sound
World Soundscapes, Vol. 24: Winter at Profile Falls
World Soundscapes, Vol. 25: Babbling Brook at Bald Mountain
World Soundscapes, Vol. 23: New England Melting Snow
World Soundscapes, Vol. 26: New England Spring Peepers
Restful Songbirds for Sleeping: For Looping, No Fades
Cape Cod Soundscapes, Vol. 33: Spring Peepers at Perch Pond
Restful Fireplace for Sleeping: For Loops, No Fades
Restful Ocean for Sleeping: For Looping, No Fades
Restful Stream for Sleeping : For Looping, No Fades
Restful Wood Stove for Sleeping (For Looping, No Fades)
Cape Cod Soundscapes, Vol. 34: Dune Shack Wood Stove
Cape Cod Soundscapes, Vol. 35: Cape Cod Beach Ambience
World Soundscapes, Vol. 27: Costa Rican Rain Forest
Cape Cod Soundscapes, Vol. 36: Gentle Breeze in the Hammock
Restful Beach for Sleeping (For Looping, No Fades)
For Sleeping, Vol. 18: Family Drive with Vintage Radio Show Ambience
Restful Christmas Cafe for Sleeping (For Looping, No Fades)
Restful Piano for Sleeping: For Looping, No Fades (Stella by Stars)
Cape Cod Journeys, Vol. 4: Memories of the Beach (Piano Sketches & Improvisations)
Bartending Nantucket (We Were Salt Water Men)