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 0xc7302dfece4cb51b430dfbd255b9b7ef0cd8b8fd4c7191102ab8ce13d531a245. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/584c8605-287d-40a5-a55c-05b46bb4eca0.json and https://artists.proofprofile.net/proofs/artist/584c8605-287d-40a5-a55c-05b46bb4eca0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Choral Masterworks Series, Vol. 2 (Live)
O Jesu Christe (Attrib. J. van Berchem) [Live]
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 0xffbf2dcab58c31a5babfb0eb715161cb3a1cce2151b0c5a7dae8902057206eec. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM81034687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d1f683cc032e19813a87fde79890f4a9e6a03b7cef1239d03a237530aed2e3. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZPRL2100506.
Where Peace and Love and Hope Abide: 2007 St. Olaf Christmas Festival (Live)
Promise of Peace: St. Olaf Christmas Festival 2022
Awake the Harp (From The Creation, Hob. XXI:2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc89ffde276acd3e06114c4d706ef39e46b3f4a3d77192aa7acd407f6e8910f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPRL2100345.
Carol of the Bells (Ukrainian Bell Carol)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71163344ec16d1cde6a1f3376e9d2a517f17827295302633b71edc6694efe415. 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/QZPRL2100355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ea970c51110fe6a1ae8b232471402fbd4d6b677b5064fa0aa1f8939c5b5d23. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPRL2100358.
Love Divine, Illumine Our Darkness: 2001 St. Olaf Christmas Festival
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e979b1181d74c35ee5a9ad3ed814c28be8ca55b7d8e95cb90b0a11ebd07f58. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USHM81004965.
Keep Your Lamps Trimmed and Burning (Arr. A.J. Thomas for Choir & Conga)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a9becae7945c6762916586864b3a327ec5b12bc95ce79420be516d36a7eaa2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81004966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf493a76644e7adefb14cc57f1035d7412cfe6aedb7d75aa187580511b67b7f60. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81034719.
Child of Light, Be Born in Us: 2004 St. Olaf Christmas Festival (Live)