The Spencer Davis Group were a British blues and R&B influenced rock band formed in Birmingham in 1963 by Spencer Davis (guitar), brothers Steve Winwood (vocals, keyboards, and guitar) and Muff Winwoo
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 0x81892004ea2df36cdf46166f6e7eb394ae9bb879103945c103e63eb2e3fd6fec. 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/bf107aaf-cdbc-47d7-841d-b47c083a3d18.json and https://artists.proofprofile.net/proofs/artist/bf107aaf-cdbc-47d7-841d-b47c083a3d18.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 0xda71f00594ddfff0bc01beb72e9c3d10f1dc3e47df53a767d74fc2f114da9567. 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/GBAAN6600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda71f00594ddfff0bc01beb72e9c3d10f1dc3e47df53a767d74fc2f114da9567. 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/GBAAN6600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4817c630bdbc0393d622044131436376b0852023bcc537a6e607729a5c84cea. 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/ES64A1056505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba64eeb6b8380cbf4291ac482fda4e627035f15943df04d370570ba1aad6208a. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USA370998945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59081c2456efabc4f290dbef8ce7216bdd864bfb7b9d0e1bcb8332db4829325. 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/USA371028458.
The Vietnam War - A Film By Ken Burns & Lynn Novick (The Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273422b4bcd1f35e5db2b2e3c832f7f9059c19f0234cf457de8cec9b480bf7d9. 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/GBAAN6700008.
Gimme Some Lovin' - Single Mix / U.S Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dd3f5ac7e868bf19f87f155f4bf3a4c200f057f546704605400f7e08f554c5. 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/USEM38800203.
Night Comes Down: 60s British Mod, R&B, Freakbeat & Swinging London Nuggets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6cab20f678c2c9b413d679ce9dbbc13267d0ee88781656fde23548d0f816f1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBBLY1601590.