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 0xd1ba635082ae6c7929b637577e0796e1b45fca56dda7e98ff86fca8c0972dc6e. 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/9f7568e1-fece-4ecd-91e2-2cea53666c6b.json and https://artists.proofprofile.net/proofs/artist/9f7568e1-fece-4ecd-91e2-2cea53666c6b.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 0x2e61f520630c87e526a0bec1f8778339380f7f88b50abe4b8d20b20db10432e1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR5GT1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ffe1e27ea70f12298fb64c235ff7edfd8ece8561f99ba3e178a08d5c32eac4. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FR9W11825432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248b4d428d674739fdd6e76e6699b39b7659c41d63e471f9f30d62d71074fc76. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR9W11905859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248b4d428d674739fdd6e76e6699b39b7659c41d63e471f9f30d62d71074fc76. 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/FR9W11905859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c932b95cabd23e05b1c2ce133d390dda28b3ec1cbcd253c8c5c029a80435f82. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR9W11915795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb758bde118ce70b03da3542b22c9c1ca76df1191df78c899debf72f98651ad66. 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/FR9W11822897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737994455c34666f45ad0d4643467de0ab636264b83e9f64286f440fc965cd50. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W11908637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737133ae5c027ecbbdc579fcc8f47b33eb41b7bebd3ff2acc71b87835195efa3. 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/FR9W11928482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2d17fb5c7e85e2c507a952340b034f7b7c89c873360faa681a5bba4d40097c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FR9W12001760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1183eae523ba81ddbde9da21cb34e7388a446195fd8c9f88cadbbb094d9669f1. 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/FR9W12008185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dc76eee79c9c4fdd3473946c497523613d18fb39f0a27d1b6bcc61d80ee66c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZW9M2230598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bb759a7fa01eb0dced3e766d33d82037c446121c2a015e7afac7f142bda59e. 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/QZ5AB2307544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240bff273ba99e12f74d6b09d66b23b078d532254525fbde1377ff9c0a4e276c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG2494197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea62bc5ca05f2face3dbc403ced8e1e807279649c55d138364c8dd86c14b28e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2494198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b75b42fac6b271df4a9f73bf085c01a470b7693f5f6cd2c963e5afb580908c. 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/QZTPX2469122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cb254e90682e56de030a9d2bff82ca9f307ce560da6d3f917b9218ba1656e7. 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/QZW9K2470289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c63052ae9f9e5cb1b39a49a9111c8012859cccc7038dd822a0f5ea3c926b72c. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZW9L2458416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d74b890f359d2bb2bda57baf7a149e99e0c59c2b85a76a522fdb6d0854f304. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZW9L2458418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a28f6e9d3a01868f16e0e9446a9b3c640ba285aad5293c26752d47d352481b6. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZW9L2458420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba53684064bb8d92d6d35812fc1b17255e524ce88d368c4e9323f72f0899d219. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZW9L2458414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92102f4f2db854f082656cae8a1ad5caa364689eb90f531d2d2d2254fa5d5591. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZW9L2458417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98274d42d6d5c9bf35474e8aaadf1a4121e5ac187014a30b0dd99cd88cb312a5. 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/IT7LD2403747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf154428d3ef49b91b48cb070d7cc5b6479d6c7b85a8559ae93603dd053c65115. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZNJW2527099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a18e336f44ed9433b338e16dd8202e9f1441888b425286de42d8264b59aa0c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTPX2340689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b20d8b831fff5f93ef22285241a78ffe418a00795d8820575ab9fa9e3f8105. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAGX2320236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5db3a14997d33e8a7d34e636287a394b28a9cad722afc2f7b3bb6fb560bfbd. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCADS1873239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483a4f6ddc0696383c6896fed3954633539cbf01c7440f04c968b17729281ffd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRZ082000427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea33c35941a61d7cbb577966fe96885ce2a754fada324ff820a427d198a5317. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X41900914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1826bf3f5853b540318555b74b8f43f404c5c30edb956e7bfe283acf21daed34. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6MZ2440140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b65db63d3bb7fb6d74cb68902bdfa3dabb9c0daed77779352cc40f70b27125. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR2PY1600470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1831a80746d29b72f724b42e9bbb7b80c1bc0d3dd15ba4828e86e1ff32bacfb3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2PY1600550.