Sam Coslow (December 27, 1902 – April 2, 1982) was an American songwriter, singer, film producer, publisher and market analyst. Coslow was born in New York City. He began writing songs as a teenager
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 0xde76b7287ffd90afceaac708a1a52ae20479ebe1f1be8f2c49087832461f3145. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8935bdec-579c-4c9b-9f7b-5be2293bff78.json and https://artists.proofprofile.net/proofs/artist/8935bdec-579c-4c9b-9f7b-5be2293bff78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Top 25 Classics - The Very Best of Sam Coslow
The Golden Age of Light Music: Amor, Amor: Music for Romance
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 0x21bdc22355d563119d9be2c250ae3e11c16cdb50f031fc4d0cd780ecc85fdeec. 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/CH6630753301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405cb9fecb3d08b228aa9d6eee81af2218ca51aa1b292e4068346bdf175bb532. 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/USX761695301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de3a3dae3d7fce9ad6df7a22e728397a68bda69c7bf182fb9e5ccfe3760b039. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USGR10110081.
Marahuana (From "Murder at the Vanities")
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe and the World, Vol. 16
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cde7958ea9f87acde1d9aabbcbdcc6d02a287512867d4fbabaeddef54ecf70. 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/DEL111801365.
Vive les grands orchestres: 125 tubes de la chanson française par les grands orchestres des années 50 (Versions instrumentales)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3ae8c98029838344a545412c7e191c586ab66750beefca79aff2bafafd6641. 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/FRW111300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c8e91c614c4e4dea31578f782696269bf03b88ca636164713277cf93236793. 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/USGR10500584.