The Sylvers were an American R&B family vocal group from Watts, a neighborhood in Los Angeles. They recorded the singles "Fool's Paradise", "Boogie Fever", and "Hot Line" during the 1970s. Prior to be
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 0xbd28c7259f11c8e6c06176fe4bc04781428c289cde84093e6d15e85b4f35a2bc. 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/719363c7-f4a1-475f-9454-6fcb4f8c5dc8.json and https://artists.proofprofile.net/proofs/artist/719363c7-f4a1-475f-9454-6fcb4f8c5dc8.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 0x1add9f7c29e1af621d83bcfd4cb1e29bc462549e8db862590423e9aecad70658. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBCLQ1700142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc084c875adea72e46cb23fa669251d02049024e60ec6741467004fa8e962346. 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/GBCLQ1700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7686971a6db921ecb2b6d1f5c4a915a3f1f36def3e8a004102ad6277d98b42. Chain 2 (Bitcoin): anchored in block 957626 (2026-07-11T23:22:04Z), 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/GBCLQ1700144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5044a3aa38d56a8875c1911715b8dcbbda36f275cd3de84f1f38364ac44cf3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBCLQ1700147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb25ba034ac55af8498329bb19ff98f933fd2904cc4390a1f1504c157d7294c6. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/GBCLQ1700155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b2fed1ca409e3ebabfdd13d6a3e32659800e67dc1e7a26f39f7724a92ae6c4. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBCLQ1700159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac176475b0ac23f680574a283d33d581d36a43c75d3adc9ebf86ff6c333862aa. 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/USCA29701179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8881123dd21486179f22ab84966b25d9d08dba320604ce50490120a2e91a933. 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/USCA29701180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3ad54905cfd4a29fbc12577623583b0c98bcc2cf59d85866c6538e2c547987. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USCA20101456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69a2c2f43035c3af333343407d0c1382295ccdd214d5e11bb3a134889928bb8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USCA21100517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cbb49b4138551bfb02ee2239df6af1a108865e9f20ff38cebba0bf4c2b5326. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/CAU118105567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3ad54905cfd4a29fbc12577623583b0c98bcc2cf59d85866c6538e2c547987. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USCA20101456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00187ee6bb453a04ccdac4037a9d4cf10531bb63e4ce1f5a7361847c4f92d2e2. 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/USCA20101451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f90514bfb17c22770c42122a868f2fcd4b9e46361327b6c2c25a317e8d09f90. 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/FR8GV2272160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a49a3c1f4b79ce21119e5e73a127b95b32c7a1aeb3a749e136c019f5705b45. 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/FR8GV2272570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4999cda44e24867ed9beb11d53ba2957146ed1799d613e505d56338f521e0ce5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAJE8100326.