Cheech & Chong are a comedy duo founded in Vancouver and consisting of American Cheech Marin and Canadian Tommy Chong. The duo found commercial and cultural success in the 1970s and 1980s with their s
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 0xd352afa7ad8d43ccc08df138a55f54bcfe0074f131f30d7aceb4964a90e7c421. 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/9febed9c-384b-4bed-b690-cab7ae0b9b06.json and https://artists.proofprofile.net/proofs/artist/9febed9c-384b-4bed-b690-cab7ae0b9b06.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Up In Smoke (Motion Picture Soundtrack) [40th Anniversary Edition]
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 0x5413f12061802a5bf841c60fc139ba87086a00324b87a69bbd9f380437d7433e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:26:38Z), 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/USWB10000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb02eddaa8b148b37670f2a7c80e9d9c8c6df1628fbe795a2ff693cfccedaa76. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/USWB10000404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa6d1691cbca309380e511be489d5c7c134d6f5429fd55ceb1b56c7498b0875. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USWB10000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffa59e9c4c7e8e0eb150add86b0dba15e10b019ea42a5a7afeb9bcdfd2b4244. 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/USWB10000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456cc1814120aaf0f26da7d7435e75f3ca96612a992596d7cff83f5369d9539f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USWB10000408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98f8b120f1c5f59b581e45f971a31e54b289e1cc88ede0f366d21cf18894f04. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USWB10000410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0baaa8d42a904271098b27298f34716378d68cd604fdf9a2e28d91349e553b9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USWB10000411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634450b5d34db2d41ddf16757c7610beedaf915f3fe29dd6db854998eade7b00. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USWB21700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70e4fdba26dd764048b1dba22237b23571edd5a1e5c5bb83401831dddc6aaf9. 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/USMC10200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845dbf0e53dc8019949519fe0e305278d6741d4210cca172e94bbcde51d5bcd0. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:33:52Z), 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/USMC10200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5eec00dcf346a06e64cc40717db92d2655cd2f117d1c65aa168edbfcf41f03a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USMC10200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395660c601e89d104e9fa7ba96407d5ed8c5f2fe6afa81de968ca66ceda5fe10. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USA371070598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84dceba689bcb6a1ebdb3c47a0df2d27292b968b3c351b2062467edafd9fc00. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA371070599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8893d4f14577067f19f87da9a623dee626238c24ffc827fb6cf36c4e916f7f3. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USA371070601.
Car Commercial featuring Sanchez of San Antonio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3964a9a487bfe991cb22fbc34edf7e081e7d99c801a9564ae2f9b70bcc8343. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USA371070602.
Kotex, Pristine and Acapulco Gold Commercials
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a633297a8df1f51d30da59f7e500508a4c1e4e5fd77b0b19047746f8b75643c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA371070603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484b5ceb97402db528f3cc7f4e1710a9a8e533a15bcf2f8d163db96de0be9aef. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USA371070604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedc5a9c8ff51c71eef2a24d86e852845a1f4110f5dd23159bbfbb4f54d27ee7. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USA371070605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4d7398a592b6122dc2d4ffcf971b1cf45f18210d06e7ef75a352e134f9d817. 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/USA371070606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1e6197f843c75cbcdc4b85c0b2065e3ae951508bddf53bb8cbb97dba687933. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USA371070609.
Have You Ever Gone Into a Supermarket Totally Ripped?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e1206e933f57ca6e5123692c2add2a8ee610ff1dc7010f037514aa15e3951e. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USA371070610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f4d90be73de13fd1a03416ed94a7ac6882dd535a1ea09e17c1be87888f6772. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA371070611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d5cdf8d684ad46d1ad9eadcc8aa5b6345b5bdd6012bae3a36545163e936998. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USA371070613.
Cheech and Chong's Animated Movie! Musical Soundtrack Album (Commentary Version)
Cheech and Chong's Animated Movie! Musical Soundtrack Album
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf912faab034210703e61bfe3a94574d6219dc9a654e6f3b1a827ceca1e9d01. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USV291375940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dd262fbd31afebfd49d59a51fef90791a3115908a0dcb8be0b4d2c73d83393. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USV291375947.