A work of art, artwork,Mostly in American English art piece, piece of art or art object is an artistic creation of aesthetic value. Except for "work of art", which may be used of any work regarded as
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 0x7cbaaa776d6688299b49a707a68bca40437dfc94ca06ae9a3a2331604d37dc01. 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/dc51718c-7da6-41c8-975e-e87fd06f45a2.json and https://artists.proofprofile.net/proofs/artist/dc51718c-7da6-41c8-975e-e87fd06f45a2.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 0x11bd5c81852ecae833bef0c713dc3ca73d5d19c63c8c909b6778e74b9df61947. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/ITG270700307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c01a6f15c535a0b5b71b4d7ba0752d53ed0a8d1bd8bff67992900302a41a392. 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/ITG270700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f29286498e93af1a543004e779e78562bc6813468dc81619af43e228c97b52c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ITG270700309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d84aff5b3018562754b64e619e200904eee580be0f346d866ff9e3c215eb75. 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/ITG270700310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc120dbcef290e689927fc003aa0ed03f13a3903d631fa42098e009b6596f6f50. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/ITG270700313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aff15ad892b17997aa846d20c62242290c2446fc8edc0d68b9836659f8e489d. 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/ITG270700316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8459d6dd7679e443a5d198d135ba8d4754bc5d8931ff6739f56bcd21ceabaed. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/ITG271100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c02b3bf069bd25da7df2b6550512bf95c13b4083a08fd0a1857100f8117e8fd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ITG271100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660ba5f9ed03a57565921fd621c7b30780f620eac096a66a1b331655ebc0c249. 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/ITG271100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a235cdfe74f808d8a33525176cbe95373dcbe7a513bef4258e0546ff5b993c. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/ITG271100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6c41875fe5001389368e784186b0d2e28fba4af0a13c87ace5800808e0a398. 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/ITG271100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ed2263d9cb93c31579d7f2437261c03448ff4bf6a5118b18d1e716f6be52f7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ITG271100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c55ceac10fea68568c943cefa3fcda0d2b98d207560ed1f03c610abce606e6. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:57:42Z), 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/ITG271100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb34fe7c13fbe5e8ed72b9cb239dd261bea9c77b7360e3d5a604fe5bec95e323. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITG271400356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1be9fe58a4001925c480d5fe6ac726285b34d13c2d953311e667550d93fa4a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ITG271400357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f8e86d355cf8d9cd77c7a61fbbf01c3e248d01f91a11f1f0fb0a50c267dc86. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ITG271400358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94072e7d7110f7e757e377e7e859acb3713cc3400cabb0604140735711552a8b. 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/ITG271400359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a50c9f36e5b31e1ca1b92696e5ea0596cf3c94d2f14cdeaf96e7b4f937d55e. 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/ITG271400360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4544b24e99bf023125d848a7df66249c9cfc83f0e42c9cc798ace84a877cc83f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ITG271400361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9a8ec5850ccf0c23d6b9a0739bd18e82c623ee859a0bc77bc1d5015e2264f2. 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/ITG271400362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2217d673d639a0400b3210874acaf464cf5c732874ad6ef5414541af5e325b9. 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/ITG271900754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0a153dc473b4afefb166f392949722141ca9218aaa273e98b4f36d771c0d0c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ITG271900755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85ecd89f2b42499789f5dc744ac467912628bec81ed6d2bf17d30ac36373c92. 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/ITG271900757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a810519b91e74d2491d8fe7078a0da967366549148b5d47890af77ac71d4ea2. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/ITG271900758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70dbfebfe60cd5596c38e0d70d8f9340652889eba3694ab89abb7bd115b7bf8. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/ITG271900760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7739ec8f9109fb6b8e30a54f5eb35d56f17fdbabafbda81df40df0ae8742e41b. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:54Z), 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/ITG271900763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7740856670ef102179f14d135431f918396d12cfc0f33ddfdaea43348e6ce7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ITG271900764.