The SoCal VoCals are the first of nine a cappella groups from the University of Southern California.Chard, Tea. "Sounds on Campus: Two radio stations, a cappella groups and more aim to please Trojan e
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 0xdac99bd565a9d539f8326b4c0d7947ad739e311b59f9fbc0482fbfe96a24e899. 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/46b84892-bc44-42d4-8c5a-ec58a6e8cb4e.json and https://artists.proofprofile.net/proofs/artist/46b84892-bc44-42d4-8c5a-ec58a6e8cb4e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x1d3c5ebeb42dd78bf43e8d20ef9c866f0d4cef9f5c7b1cdeec0f397eff7a4096. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCABM1340192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cda3da2988a1adb57cab04d10365ad92417cde8d1ce9a280807f8ddb250748a. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/TCACO1611639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2731e273f45518df1ca9d7a171eedb04cf5ee8aa717f3f2c2c05a9e35caff288. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCACO1611640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef76fd46dbc0bc3f916a6fd16dd8ee0fdfb4e858dd778847e089e90faf2306d. 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/TCACO1611641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104d149e901df528095ed29a9874cb37b10c8d8efe8820a0094edda44d95f28b. 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/TCACO1611643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d1e3d828a28be4e0e275c6d7698ba2ab9f0ea5cabd9f018be40e51db0a435e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCACO1611646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccef452f54cb6d7b97aad4d8c2b68205f8a1c83db775758fc407fbf7a521c164. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZ22B1964090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7de1a46aa102085a07a8c06a0344587d9e7d53f7f3e5948726cfc946bec2f1a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZ22B1964092.
Lion King Medley: Hakuna Matata / I Just Can't Wait to Be King / Can You Feel the Love Tonight / Circle of Life
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8e6baa53ca92af0b5dbfe731ee9fd909777743b4d69978caa285af9504d30e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USE830900685.
Voices Only 2011 College A Cappella (Volume 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e2352f53ba446548617779798e119fc616fe00c35a96786f87d6d9391cf0b8. 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/TCAAZ1143495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d40abfd97f240eb44f5f024dd50e553a2524df32a2f740386ece645bddaf3e5. 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/QZ22B2047121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb40d338eed72edfa0d4fe30d90489a2074387cbc5329c251249c6f16f5f750. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAGK2279829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ae7f2cc45f9be1988792dcebaf05c3d97191cb975b596ff3390f78c2cd1fcb. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USE830921299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d6b4e37e26959c58f6670333c8897a0efb112c409d5bf1ee28b0a762772d80. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/USE830921326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8d43118813720731b4d72e7eefad8d44d46d6d94199475502fc88a9d95d18a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZ22B1993558.
Voices Only 2013 College A Cappella, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b984d1b0e30ff8041773a047a638c5e25c6f9396b693df9fc538d9467449127. 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/TCABP1338557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcfa1427c8d09687359a1b156b1d975dc91e9dff9524e5f4b404341338a8c93. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32232559.