The Kansas City Chorale is a professional 27-voice chorus conducted by Charles Bruffy. They perform a four concert series in Kansas City, tour nationwide, and perform with their sister choir, the Ph
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 0x2890d61f041d8e50455b32357f7c53dbed08f8d428282fcd6a6f4cb0c7ee6a79. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87fe2b56-1a02-41eb-9ead-b82833b815a9.json and https://artists.proofprofile.net/proofs/artist/87fe2b56-1a02-41eb-9ead-b82833b815a9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Rheinberger: Oster-Hymne, Vier sechsstimmige Motetten & Mass
4 Songs, Op.17: I. Harp Notes Ring Forth
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 0x552a66faf440fc891c2eb1972029d230e98d80f74d0fea3669a8108734c9eba2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU0600215 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65ce2ecd5892cd6a53051085b8b5d1697e148047460fb1165611a0a48033fd1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU0600218 — a six-check JSON result.
Rachmaninov: Liturgy of St. John Chrysostom, Op. 31
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eee4851545fbac9e77f4a0c25d8a6457cc3920b7eafb2c7ff0067410867295. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9500198 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd265a7237fd76edd427f8dd7cc77136eae1b8e65ea96f6eb1b41260354aa107d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9500200 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a972b50db6be8e2c7b87917e3970ff325ef18c3bb920ccc0197736b0e176d42. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9500201 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaf5057ebc198d6d6e1029ebf9e49129ddd68b7ae373e478c34d846b1621548. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9500204 — a six-check JSON result.
Johnny, I Hardly Knew Ye (Arr. Alice Parker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe129fee2e8e35eda363e292a4529dfbf3068e6a573d1a0f2e72e48ebe465f662. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9500207 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b836f53144c8a9c94b2dc3dd0112f48fabe3fc9e882987f13d37d33a756b2bc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU9500209 — a six-check JSON result.
All-Night Vigil, Op. 37: VI. Rejoice, O Virgin Theotokos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ee648c9a7951c135cb02f3995057a259277c9d1a0b7d8ff4e764edb5215a5e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1500506 — a six-check JSON result.
All-Night Vigil, Op. 37: II. Praise the Lord, O my soul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4316974fc46ab2e392af8b47669c4d45895083ca732e435dbba2a7875c5dd6a8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1500502 — a six-check JSON result.
All-Night Vigil, Op. 37: XIII. The Troparion. "Today Salvation Has Come to the World"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d228577b7e65f97a329ab527820220052ece236ed96a32599b614972dce037. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1500513 — a six-check JSON result.
All-Night Vigil, Op. 37: I. Amen. Come, Let Us Worship God, Our King
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f79b0ea82018e3c1608a26b191e7201b076683f41ac6e6aee24af96b74e8d4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1500501 — a six-check JSON result.
All-Night Vigil, Op. 37: III. Blessed is the man
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7f460562223f5780386e1338abd357f0370888cfca4a343df04ac33ce263ea. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1500503 — a six-check JSON result.
All-Night Vigil, Op. 37: IV. Gladsome Light
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc4f10ba59b074837456315c053c0254b8d0c0d8e4dc84c4289d83acd196ba1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1500504 — a six-check JSON result.