upright=1.2|thumb|A poster for a American production of Macbeth, starring Thomas W. Keene. Depicted, counter-clockwise from top-left, are: Macbeth and Banquo meeting the witches, the aftermath of the
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 0xf0f85c142bf4056065fe1557ea9e6008acc485344ed272d048764088ab0801cd. 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/a18ee242-2cbf-4922-9bb9-d488b172e54f.json and https://artists.proofprofile.net/proofs/artist/a18ee242-2cbf-4922-9bb9-d488b172e54f.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 0x9c0a4b3156122f2a566d79b0dcb7ba6644e19770979579e5ac07df6fb4de41d0. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZFZ52197388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3aa69b51193697da7d23cb7975969eb0c7beab9cf47048d6c5cce43138e83e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ52197389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4379b10151676b921941d782f533d106df306657c864ab5a8196b8095c91a377. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFZ52197390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47268cec65e05032c7fcd346faaf3c7b178db1548b7861984be2bb76a578715. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:05Z), 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/QZFZ52197391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc956acdb053e07edb340d171e5269060cbd60daab39f032e1393652b3730cd97. 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/QZFZ52197392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb958f5ca0f79cbca84e823a878cdb69cea024f02b2eb787b984c084b22c1ef75. 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/QZFZ52197393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd79940d71a38896d3b6206dda16b89f1121c2b118109d20626b19f01ffa4106. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:37Z), 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/QZFZ52197394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bef7943d99d550b34d4c7e1cfff44645bf5844bd41121df49b83ecff0073cd1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:40Z), 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/QZFZ52197395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab67c074d6902c79388495b08f58b9b4364707d1391f58ba8e695c429d6bc703. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZFZ62171959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76aec9e039acc577fa7d85f56f29ac7027c4560d549704e51b7f3848dd214022. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:13Z), 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/QZFZ62171960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a088c03957227b299df7b6f036d27d995622d3261aa550c66a0cdd121e37fa8. 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/QZFZ62171963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dba17c3fe6a6e4696f22b323209c7057d482e007505a62d509d10efdb0aea0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:47:38Z), 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/QZFZ62171964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dacf7cb46c2a3247d3991064bed76d190cc4880f54a12e451a26274ab703d6c. 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/QZFZ62171965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6068b5d9b2c70f69f2910c870b617f81681bb25467959599e275260df3e1cdbb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:33:47Z), 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/QZFZ62171966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a0335a57513189179891e78a00ac781103c9472c290caebb17d2ec7c281853. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:52Z), 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/QZFZ62171967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb04ca6c80f4ecffdddc36dbd2cd52262c5fd034e419d2d6f8718c78f5f800c. 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/QZFZ62171968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dda8afd6eabd77e6d415f27e624e4cac97ebb9b458d423cb1e7c289e82d644. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:35:18Z), 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/QZFZ62173506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b8edc3b7d3793d2a2da87a562a86d5d32ead74f86df8563364cafea3c3a71f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:51:11Z), 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/QZFZ62173507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8bb121c430b34e40a09ec587873f12f4e52f4e1af2a41ea43765c94c64a77d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFZ62173509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd662a85abfb0675c3f284994e917f0a0dc017660e991fcb37eedd6e6b9ec29bb. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZFZ62173510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6c543724d3ce485697b51e5f8bd346dbf487c98f6d86e54b3fcd9d2f4c407a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZFZ62173511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad4d1c7eb3cf42fa44801d80d2efdadd343791b880b6d583a947e27cf59397c. 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/QZFZ62173512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16c963ff0fbf231520ba57d69d755aa885d0f3531ab839c8c2568cffc816bb9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ62173513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc692b91e1864958f40ee9cfaac1cd2f248691c57155c8b0409ac9e7cbed9a780. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZFZ62173559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81b587fed004ca6798836e63a167409fbe21e1d5e4b3b1795ee2779fb05c790. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:51Z), 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/QZFZ62173561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0409b10e7aea8f8287fd19607276895c76c32495035eb0de773b6fc25d4bd7. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZFZ62173562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0d2bf59e6d0b2d54306be76da32cdc6a4751c16da285ab5df10e84bbc2c0c4. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZFZ62173563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee807e100b0602b6d8d2ffcb36a2912e0e91e7569125553baa9320252e804a7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:35:30Z), 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/QZFZ62173564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0d45bc1d594313e816da02be89e6e2756e5b0f8be6512cbe9db9b53ad43711. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFZ62173565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81acff8d7c1fe4dc0803bad11265624e16ba4adce5d29d2a779eba1c5aa4c412. 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/QZFZ62173566.