Freddie King (born Fred King September 3, 1934December 28, 1976), also billed as Freddy King, was an American blues guitarist, singer and songwriter. He is considered one of the "Three Kings of the B
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 0xc34dbfef09be5ec5ac24ed07c0e8deb935e75432eb05c29543f9273631f572ec. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa384530-2db0-4b0a-ab13-38290e56752b.json and https://artists.proofprofile.net/proofs/artist/aa384530-2db0-4b0a-ab13-38290e56752b.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 0xfdcde7fe4ea96b3686b1708f861dbb2727e190f2eaa7a56773c6fec639ab2324. 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/USHM91840240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf74da6c1bd4afed4df4c9b0803a4fdad6379bad586296104394b25fbf2b2be. 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/USHM91840242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a432c139dc28570383f16c01545697328288a0a239a1deb766b0d28cd2c2d4b. 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/USHM91840245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19ab1bc993c6387902cbb28f25a669b6b4193c2f89a341d0b00428ed6112ccc. 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/USHM91840248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933f3274185b4b36a12d87c41832657ad03794c32516c76c6b2cbc562d2dc4aa. 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/USHM91840249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5cd0cfd74c7310903b0f22763927ef10791fd626916ca05885f4bed5369a7b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZAPG1737401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbdde57479df93162b268f9e1b68e545d884eb5c58a157b9a1b979bdda24601. 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/QZAPG1737402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde12aa495ace10220cffc0043dc5c4f0b5b1db12db9dc1e460e48652b687b078. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZAPG1737403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deab3ad4f923072320fe3280b9be2eedae4a3d848896a8e67a51f9d9d3e35de. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZAPG1737406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4b9715cf0a03586fd5ea05bee5be71fbd0428809e7a5cbac2f89d425894f1e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZAPG1737408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5ca1432ab9b4483157b27d14a141ae44c74bf0ab45bcb5dc73a9a01906bed7. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZARB1801931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7af79d4436d9c65cd3975b921e77ba2671d1b9e5cc468fb24d937ec2c0d295. 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/QZARB1801932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c143e386ded6c85798238c4f6faa9a1d97b0616325a837abe8c5efb008f148. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZARB1801933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5de7069c89d07cc41f60b0fa1581bafe7acb4dc9128c7dcf1fede0b18eb02a0. 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/QZARB1825872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6ccd0307af9dcedaa3b34e0fdac80d36ce5a0a3fb3c71675102e9da778a6d7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BEDS41700003.