Acetone (2-propanone or dimethyl ketone) is an organic compound with the formula . It is the simplest and smallest ketone (). It is a colorless, highly volatile, and flammable liquid with a character
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 0x6215fdd578e1c4746a75fb5b7ff457ddcaa01ed477f656ca343ea49752dab023. 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/8856e2cc-960e-475c-8c55-7ebfef701fde.json and https://artists.proofprofile.net/proofs/artist/8856e2cc-960e-475c-8c55-7ebfef701fde.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 0x7627084a6193106705b5cd52f6724fa75465f48dd4154be701d30c5d2452626b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USUM72109514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fd6f6329649050cb0eed9a470d70ec51f1560ddc2f00fdaf72926053afa393. 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/USUM72109515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70fb0507cbf97264ffe306b697b8e4b7858cff42163b301fe4e154dcb6ffde2. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USUM72109520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbf061c9af40dc5eb3f9b567834a0eb03adca473e8fbf62d2207d84ed095606. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USUM72109393.
I've Enjoyed As Much Of This As I Can Stand
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406f28a63fe445f9342fc0d0b16e745db647810e67d11e67dc6f35f4a43dce05. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USUM72109394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd85d2d842a8f31ddb4b4d26a3c73301347bd069543c557f2f6644815eb03a7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USUM72109395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa170b63989b4a216e47ac78fd8e26945dbb0207e01e6373c11302667fb1bf479. 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/USUM72109396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0604907fc916ea302204158045d4c29b75a8e8b85382408b0cea1fd95fcc337a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:54:22Z), 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/USUM72109397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee80e96eba1de39b9585ab501b3aff579fcb7f60094cc5714c7f67069caa883f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USUM72109398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1250c8de1d8ffb9e4f406da3058c0f8f807c0006f7d7935e63485cbb7e24f1ae. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:07Z), 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/USUM72109399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcf5713960bec02bd4a480d0d32430953d11e48d20f2dbd8f785f851fe8a353. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:35:51Z), 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/USUM72109400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35f66c2c9d899247e0e05c46eb1b6b34a4e45742316974bf6bf7e2faeba81b7. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:32:12Z), 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/USUM72109401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72494248111082f7a24c307c07b09dbaf00b04824ca585f0787f28475382659. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USUM72109526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9831e07ea8a441468a80d5d8ab7dfa4bf88e8f57d5bd7633aee17de7a926e3. 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/USVP19700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98669930ad4fe639f4b61bc06a5f84bb2f0099d1f02b847d1e42085b16d9715e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USVP19700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb8506c28803660bd33bfa100fddf3d1549cca543936d70082b66e7ea88bb5a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USVP19700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92557cf07dbccf9bcb97a20218f891279eebac4e3af51c7622e0674d3db936ab. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USVP19700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b36eaa6adea5c1547c7e5e2bae6360f40122cfbcb849a4794fe4cd220388618. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USVP19700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4693ba11646b1395de48776cfa84fe4b7e999e0ae445f66d1fe9435a7b829585. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USVP19700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7137f6d8b332b2ad580b2762f1ff1d6515cfbe0f893e3bc8898a1da7ab11ad. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USVP19700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14578eeab1fc620881821f8f0bf3f9f046257c8cdd6391d753d7ead089cce2fd. 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/USVP19700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6afe6506fa6a84ce0ed44241b7487b5de311750c604012bda776a6e04bf12d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USVP10000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe664eed1c30661c29971442d6b378b367058d0dac87251eae02cbc9b4d39e1b1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USVP10000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c3e99abdbfa0153e3328d1d3824a798dd0f12f9b51a2bc8e6221441442b0e3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USVP10000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf404df74789540d997ab94df0c5631bc4e7edafefa457eb5c1b25a0a41480f0c. 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/USVP10000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dcd35d8c5416e3c23b5e600c19d99d4c57d312a358061c8f046deb058cf9f7. 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/USVP10000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bc01e417ba2e294014f46649a17ca60ac9d8c88de59ac6810bb73d24ef81db. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USVP10000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26c0a2fe7fea893c1f1e595a3b89d87b16d7df46b00172b136e20416e3316f1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USVP10000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ef2abf7e2aa1cb158d88f6ec7225f8c666def598897a6161a011e8933d48d1. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:54:53Z), 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/USVP19700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fa8a9cb6f0cb610bff1c805ea5d77778f9b93a38f979afb8a67ffc713d718d. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/USVP19700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208bba444cb2322823d929e457a7b928d49ca407ef28288eba2571d0561b19e4. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USDEA1715907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2d0aa1ec6afc7f499c726e2dbe2c9c491479758bfec935fe2ca111e9c4fcd5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USDEA1715909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14578eeab1fc620881821f8f0bf3f9f046257c8cdd6391d753d7ead089cce2fd. 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/USVP19700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47582bde4efdf00dc4816bd9c75fb9ab71e2967e33a826811c39287e94f34536. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:32:53Z), 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/USDEA1715912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8adc83d6a394416b42fd8dae6b99010f6e343cae4eb85a5ed462c6cc32e187. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USDEA1715914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005702420d8f17343eac52fa805830fce852d061f5f9292cb418c767f65d3654. 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/USDEA1715915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9257c98594d29d9443710d1aa8ebc3dbee4470e17051da2caeee9c0e005752. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDEA1715916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90e1ab08abbb508351a5cd6de986702ec0d974394ae7d4e06e80d9adbf9a6ae. 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/US27Q2320701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678411c0509a635f403d8b269ef9caba482fe4103ac0cbe88dac83b4fadc5ab2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US27Q2321201.