The L.A. Mass Choir is an American gospel choir from Los Angeles. The group released several commercially successful albums in the late 1980s and 1990s, and was nominated for Stellar Awards and Gospel
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 0x30c4aee77d59a1b2ee19ac88573db548aa8e5d7bf5edc28edf39cdeedc4baf07. 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/12b5bd84-1122-454e-8730-db4556974939.json and https://artists.proofprofile.net/proofs/artist/12b5bd84-1122-454e-8730-db4556974939.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 0x3d1c54a10606c0eaa4a7d547cfcd3e895e13ef0dacc2275525c78305213f93a5. 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/USTCF1094669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c267ca4b3ffd81567ba441b2a2e9bdf83e4332f47b00d239d81f5f304d8f0d3. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USCMG0402514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85b2a39d296bde37c24733767172ce7fbb7711ebc44f97cfbe7775ece665a87. 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/USCMG0402517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4cfb659411ff397082fc15ac1bca09045f5cf480b8321682ae1f4619c8b943. 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/USCMG0402518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e51030a27c916191202ebd6ac6ee95ba66f84dd10edc0ea8668831d71c7c943. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USCMG0402569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da59bca2a7a4544fc70aebfbed426a078ee529311aeea23459b3c0866ba0f8e. 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/USCMG0402571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657b31dd296fb72c0d39fb8cf5967d8b22feb4509846b29dd90a2c1c6ee37c42. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USCMG0402572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee986275647ed2c2b8a353b515447b3de7d1e9ab93be80aa867cc4bcc14edb1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USCMG0402574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120d16d024f072d6686dee932fd17177b2f59b9510b08c2d83bbc9a12e845cdc. 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/USCMG0301747.
Everything Will Be Alright, The Power of Gospel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1f759a49df59c29077515b433671e676a37b9605c385957e4ec9f0fc056629. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620408891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfb4677d8f291e8c7750a23b2496f01c78d252888255999208618d79d95eb85. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLG620408803.
Best Gospel (Best Selling Gospel Artists)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e700b591711d019272bf2ee86cda2b32790b376ec99357e91511fc037a6ae7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US3M50456713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20919e186badb83179c161f7e5bd5c02298642a9b2f71139f7f2c00530dacc3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBQRF1016140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d112c3af7b8428fa1bd9bbd6c266826905bc2cbd6755025c47abc7e058ae7a3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBQRF1016157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953b2d2ae954330791eb02ea362c40106ae0cab0af0a73e33dcdc00f6928fa16. 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/USCMG0301720.