thumb|A slug on a wall in Kanagawa, Japan. Slug or land slug is a common name for any apparently shell-less terrestrial gastropod mollusc. The word slug is also often used as part of the common name
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 0x92f68c6e23664cf8a2d4d4f0aec26449303eeede16cffc9357b32bac4dfcb198. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bca3799-9bb6-4515-83ca-7c9331b37cdc.json and https://artists.proofprofile.net/proofs/artist/1bca3799-9bb6-4515-83ca-7c9331b37cdc.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 0x976c68fd42e6595e2f4bdc8c4f8b3bac5ca940781e699bddc4b9b2f8f828f37d. 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/USBWK0500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bb8e4d5fd51e6f25d4198ffe737170539cf3d08f54ed49e1932ee6bfa13c05. 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/FRX872191284.
Nowhere City (feat. Slug of Atmosphere, Soweto Kinch & Thomas Jules)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bb8e4d5fd51e6f25d4198ffe737170539cf3d08f54ed49e1932ee6bfa13c05. 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/FRX872191284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39ec4dfea7530f177b79e7b8a2b45c7ac1d6158cb630657e668c55006afe9e8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USBWK1700098.
Don't Leave (When Winter Comes) [feat. Slug of Atmosphere]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4956e55a17d27e7cfebb6fa0010ccf10b2c2af921795c079149e14398155a7c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCABL1227892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e2b30d99a2f9276d44fc4840184c265437c0e68316fc2f12f654d3e01388da. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US92U1911044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427624a9f0f52956fc5256526f2618d1dc9f9f020bafe911fc71847e383ed3fe. 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/US4PG0710307.