MFSB, officially standing for "Mother Father Sister Brother", was a pool of more than 30 studio musicians based at Philadelphia's Sigma Sound Studios. They worked closely with the production team of G
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 0x8c85381632fb46a969c6946bba3a32c06e12d77290de35cf3b6a326cc4f3b69b. 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/e5fe8725-31c7-4014-9167-ce420397da7b.json and https://artists.proofprofile.net/proofs/artist/e5fe8725-31c7-4014-9167-ce420397da7b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Love Is the Message (feat. The Three Degrees)
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 0x7cb3370cfeb4147ffbf89f739ac21d821bc21427ef97fe7a57c5a67c6f6df776. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM10202945.
T.S.O.P. (The Sound of Philadelphia) (feat. The Three Degrees)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fed6e36178b52863a8506d6925e21ee16c5b5cb3dd9e4acac4c687a409a4a6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM19922857.
T.S.O.P. (The Sound of Philadelphia) (feat. The Three Degrees) - "A Tom Moulton Mix"
The Sound Of Philadelphia: Gamble & Huff's Greatest Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abed23df00d95eaca57db1c132c295eac6d9a3a3e6f8fd09717a0d219341d8e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USSM19500912.
TSOP (The Sound of Philadelphia) (feat. The Three Degrees)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2d56d696210f19389b3b6e0a89902223c9f7dcd792f22e6eb5a802efd8a4fa. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USSM19912523.
Love Is the Message - Philly Long Message Street Strutin' Mix
The Women of Philadelphia International Records - The Remixes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39bd5e49a480aaa321c8696c76f0bef67ff104f64816dc62df8351e016cf073. 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/USSM11701254.
Mysteries Of The World - J*Ski Extended Re-Edit
Philadelphia International Records: The Re-Edits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2b956af4cb4ccdde608bc813eb28db39937f4414a003b72faa185273fdcecc. 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/USSM12104163.
Love Is the Message (feat. The Three Degrees) - Single Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552992decd4cd8281a86240ac02c2b1ff3ec1153b25f40f0c6b30a0c353138e1. 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/USSM17300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb462734deff31062d91d8909447c068ae554c4c982d32f94138e7c75266ba24c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR8GV2291820.
DISCO - 100 Hit's - Dance floor fillers from the 70s and 80s inc. The Jacksons, Boney M & Earth Wind & Fire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2d56d696210f19389b3b6e0a89902223c9f7dcd792f22e6eb5a802efd8a4fa. 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/USSM19912523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552992decd4cd8281a86240ac02c2b1ff3ec1153b25f40f0c6b30a0c353138e1. 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/USSM17300073.
Lo Esencial De La Música Instrumental Más Hermosa Del Mundo
The Best Of Philadelphia International Records
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fed6e36178b52863a8506d6925e21ee16c5b5cb3dd9e4acac4c687a409a4a6. 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/USSM19922857.
Philadelphia International Records: The Tom Moulton Remixes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922620b4780eeda02b5554572bed5a7d78e076fa765d10e96a30626adc585d55. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USSM19912531.
T.S.O.P. (The Sound Of Philadelphia) (feat. The Three Degrees) - A Tom Moulton Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f73e3e24525710fdb7e505699b96b70df63a05d4dd4c91b4acea857757b8557. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USSM17300163.