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 0x9fe72347057eceac1f8f43571261e3268e4cc9798f0550f1e091f8be47f55fa9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39132da0-6367-4b02-a270-c97bbefc8d87.json and https://artists.proofprofile.net/proofs/artist/39132da0-6367-4b02-a270-c97bbefc8d87.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 0x16383590d505c86f3a4bf42d78ebd3c20bfba419facb6f377d9d92951559fd46. 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/QZPJ32223929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2108ff0311f60997db2e2f851825cb10e831ad671e7c90e9e88b8f5cb154859. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZPJ32223931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d19f55194e8cbe090dd146f61071b183db6d706379e4cb6335d45a01b59b72. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPJ32223932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26e895a75477bb7c18c5165b5f659cad94fb71def26751a60bb199e57109083. 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/QZPJ32233317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60944b793301fc9f0f7ef7e1a715bd286b67365ef1610bb2f9a01f2d3a4baeb8. 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/QZPJ32239424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c16cb2f6f6b44dae3ec9da3a06e98bd601b5152adb7c9833f63e95f03758a7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:36:28Z), 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/QZPJ32239431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6303b1c4bc53f967049c7004444aabd67482443d94aad61c05a26013502ac8. 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/QZPJ32239763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3fdc835657f1067bf1016f5ee7930a350608040d968ae64ec20b4b31debc0c. 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/QZPJ32270582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f96fc04e99adc349cf15ac4cd06f53ad44dd4f3c76a2cb3f7cb446145efd9d7. 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/QZPJ32306394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10046410e86a97cc3c2acb3119ccc4f283b90c570130aa34725cb5d3f6a9c0ff. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZPJ32306399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0736c08dd5b26e9e6d3f23266049decf66fecd7c9cee6eb485315e91b59412e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZPJ32306404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7e2679f388a3571214da7ff0576458ac90ad6ec08ee2296f3242d2138e99b3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:21:42Z), 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/QZPJ32306407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43edaeff1841231bf59aae8391d26b6621c99a7dbcbb8e9ba5c63dac0dcfd19e. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZPJ32306412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904054936b05242d1ad975691491f58afbfa351d24fb755a9a94a77ebff8292b. 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/QZPJ32330372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a616c3baae304533d8cbcd43968e161274bfb80225203b54ee0a8b39cfc6fca. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:46:53Z), 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/QZPJ32330385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6433ddeb720c01c7cc036be941dacef5d23573d13207f6850d96b8573075dfcc. 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/QZPJ32330370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1deb19d3c698088781b497638f72d061cc5d8d041b20f15670efd0f7a81a1b. 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/QZPJ32330387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c334e5bf4ffc84b6efd5fe84eecf2f31e41c1dd771db1ae7197cff98958e123. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZPJ32434225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87abe44bcf3af7ac24a03f8bdd2eba997e7a7b00199df5d86fdbbfbadf16c16. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZPJ32434232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe238c9f88783d1e2277f292a5bdf7cc34960c5ba69ff13a0a93dcb74b76e2acd. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:42:58Z), 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/QZPJ32434227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a22e76642818526775d114abec39eb7c2aab7ff0ff9955187cb719aaea50781. 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/QZPJ32434230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c646048b6500356b960d2cf036b82cc9f99ddf9a8b2364f9dfd2a65d1c4644. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZYD92508662.