The Byrds ( ) were an American rock band formed in Los Angeles, California, in 1964. The band underwent multiple lineup changes; frontman Roger McGuinn (known as Jim McGuinn until mid-1967) was the so
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 0x4aa99e882d6823b600dd61e94bf0d174216a1f6a54df2bbc6012383dd08293a7. 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/4ed0b4ba-2c3e-4d33-bb28-9367100c7184.json and https://artists.proofprofile.net/proofs/artist/4ed0b4ba-2c3e-4d33-bb28-9367100c7184.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 0x595e5dfae40080bfad3b5e037eba6415852c81a4388d2f5a27547994bf26967c. 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/USSM16500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bf6b8ede07a287192bdb6be4af59e4de88836cbb1559e9e317c0a6db8f5538. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM10023922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84aca14df625d7af973888c7a8441702ccdf9b843d6894a28d691a68af9f083. 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/USSM16501030.
Turn! Turn! Turn! (To Everything There Is a Season)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00819419de98b1ea145c426e738e9d1e04a0f643defd74f78c510c9afde13335. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM16500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2bf3e60eeabe00c7f0bdf7995fe699af9e68cde07a2d26f588be25afb4e7ab. 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/USEE10300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0373082960ada6e7d536ae32cc00de5f669ee56fcb1f26c5f840f80a8bf349. 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/USSM16601009.