Sweet Smoke was an American rock band formed in Brooklyn, New York, in 1968. The group moved to Europe in 1969, living in Germany, and performing in Germany, the Netherlands and France until 1974 when
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 0x045e3b3fc502fb32b2124c135a774cb7925aa1a74346f699bcf15b9a200b0e5f. 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/f930687a-7447-4b5b-b3a9-f21f6e475bab.json and https://artists.proofprofile.net/proofs/artist/f930687a-7447-4b5b-b3a9-f21f6e475bab.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 0xcb817f98ca8793267a7b78c9f269a9a49b59766522f2eeb6266a7f38fa10c7d4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/DEA347200281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6448de6b59ada5ed75efe01cecb242bd4345ad92217f7149b6e4cd8ea5653e85. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEA347200282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c1d066faa2f638868a6d48473fe6718eddd8d4ff91380367fcc4c68634fb4. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DEA347200283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459c3a5ca52229daeb307cd28e2144b85fcdbe0c9f56aff65d03a86c2366a631. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEA347200285.
Just Another Empty Dream - Remastered 2000
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb493492a3880526d6021053babb449baa4e87c4a058480ca145068969b2cc9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEA349901342.
I'd Rather Burn Than Disappear - Remastered 2000
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd601c00ce48d17ef842bcd2bf847e5b18afe5b62862020c19248ea7f013266c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEA349901343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6443b3d95ab615b7a4dfcd7f84fc7cfb1f4926189c0da7a461cd67283339df96. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEA349901344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681deb515e25515b4b1727ffc62f1a6feb0b641cc6a0c18cb7bd9b324a2d41ab. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEA349901347.