"Hang Tough" is a song by American rock band Tesla. The song was released as the second single from the band's second studio album, The Great Radio Controversy. "Hang Tough" peaked at #34 on the Billb
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 0xa66489c3175f778e6300ba93cb2971c400223b740b6bda8f69cad4d125279504. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b242e298-e54c-41f5-9e8c-f4741c3e9d47.json and https://artists.proofprofile.net/proofs/artist/b242e298-e54c-41f5-9e8c-f4741c3e9d47.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 0xd391bef8b78ce9e5e239c865b0c21649d1b0e8382cc356d1a09b9b0e9b450fb4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6K2389541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb7b773048f9bd9863c859dac8feffa7ea844f0b2ac3aec36b254f35d78952e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:48:16Z), 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/QZES82497861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c87a2cd7cd3e32a13c87d1c3a42fb910062f9c9a727c98ec8de8fc6bb183c2. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:16:48Z), 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/QZES82497862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabdb2bd69f2fae3dc0170f4097473ca4266aa6e8117b6387169ce64a2d58c2d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYX2477391.