Marilyn McCoo (born September 30, 1943) is an American singer, actress, and television presenter, who is best known for being the lead female vocalist in the group the 5th Dimension as well as hosting
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9119d42183e31d0c65822a96dfdf2b1f5766e89dd21d941287fb558e8de42443. 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/5f3d092c-abf7-4ea4-aa32-dffe911a1552.json and https://artists.proofprofile.net/proofs/artist/5f3d092c-abf7-4ea4-aa32-dffe911a1552.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66b1aca8588b378c6a6cb76379ce8a184c8462bc1807bfc90ab93c30b25b806. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:34Z), 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/USSM10103235.
I Thought It Took a Little (But Today I Fell in Love)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51116eb0224280bed98f98fc7de158f4f60ab648c39fc2a12c5e51b11f7f633d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USSM11207296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce44ec89bb2a4270dc2a35e7bd4a5c1b0aef47ce1717a96392288a70af9d749. 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/GBTBG1100007.
Thank You, Mister Rogers: Music & Memories
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5a8bc02f81d9f63ed058906b5012a9cf03a3806e57df6e623513fa7abb3fef. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMHCW1919613.