The Guess Who is a Canadian rock band formed in Winnipeg, Manitoba, in 1958. The band found their greatest success from 1969 to 1972, with hit songs including "American Woman", "These Eyes", "No Time"
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 0x7cf53e374b696bc711727fbc3ca6a473ab0237cc61c449d9de9172f1187bfa2e. 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/00583784-b0a5-4e70-b2cd-49189b38f37c.json and https://artists.proofprofile.net/proofs/artist/00583784-b0a5-4e70-b2cd-49189b38f37c.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 0x1d33982553aa9f36fc559f0233a6c6c13d3a11c97c82f740c03a947dcad16518. 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/USRC10001083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe82a73876921649ea5eb89c052db67d25dc3a273b366c4797a6ec268db52ef. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/USRC16804083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2cb8e0a79b44263ad3200b51a8c2ff01bf9d5e0af857bd8cc18162113b3034. 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/USRC16908370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef6f8e9b6554ff06fb30a72b4523adc9e4e3a1c506c8963663b137793d2fa1c. 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/USRC10300522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef6f8e9b6554ff06fb30a72b4523adc9e4e3a1c506c8963663b137793d2fa1c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USRC10300522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d33982553aa9f36fc559f0233a6c6c13d3a11c97c82f740c03a947dcad16518. 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/USRC10001083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b0cb5a7b943768c15ae34913066af002dabf1faccf0147bae00dfc68cf58da. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USRC17308359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2cb8e0a79b44263ad3200b51a8c2ff01bf9d5e0af857bd8cc18162113b3034. 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/USRC16908370.
American Woman - Digitally Mastered - May-June, 1988
Cuentame Como Paso - La Generacion De Los 70
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650f191d668792cf9c88cf45e92b459b76928785e98b5ee93f2a1cf542717a95. 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/USRC18805928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d33982553aa9f36fc559f0233a6c6c13d3a11c97c82f740c03a947dcad16518. 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/USRC10001083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05d5c872dde1cc4bf74cbf478dda41878bab0ec0b8f7be307af69189b8ecd3e. 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/USRC10001087.
Halloween Classics: The Evil, The Demented, And The Just Plain Weird
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2009279d8c19e79001f1e9b0c3dac7ea728f2f3a91683f7447c9d5c50566c4d. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USRC10300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2912a4efdeb705bc01787d3e707e9318cb69a278e6791a790ef066f7b5abc6d1. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USA371080713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef6f8e9b6554ff06fb30a72b4523adc9e4e3a1c506c8963663b137793d2fa1c. 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/USRC10300522.