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 0x6b4387f77ce47cbb1322077265d3b78a04d11e313317755e35a9452881f749e8. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8748b5df-c11f-4e69-80b6-4e6966eaac2f.json and https://artists.proofprofile.net/proofs/artist/8748b5df-c11f-4e69-80b6-4e6966eaac2f.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 0x32f974aba64c5323950cbda8bc081ccd89071b79ddc42603e16608be806ccf0a. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/USL4Q2265734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c7d4b0bc5b90354ce863b9c5842af0d6c5cfe933876f7efdba2e32397426ca. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USL4Q2265722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb8fc7fd239664e84ff86412afb4a7d06d957523d92466da3d685f3af50d875. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USCGH2341899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69525feb9450e53e7fb747330c8b62c7718bd0e9ce97321808ae6808a5afa0b1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH2358416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621247e80285000e369ab85be660a48b2892596c19a21314f2c3c96e68fedbeb. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/USCGJ2352821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924da7e55235626920ae9e2e84281c7246a6d80f35b5b8cb0167d302fd705852. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ2352809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd492fa54c8a18534ebc70503b7e31d1cdc04ccba72cb207ca5c92324e9acf1b8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USCGJ2391161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5a73fa8e4e82ca52e347fa7496d8970f5387aadc84ee876f1e3e884d83e29b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ2391162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc4888189b5f65ac4c0fae264aea675c074f20189f1f5d1d6a21660678c4ed0. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USCGJ2391163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5871ba12f40745cb726600cbac186dc740847920abee79ffcb1cc69948836e5. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USCGJ2391165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3c7701bebcb2ab955ab7c234e4994dfddc63adcead7f09b6127b97079c2aab. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM22315849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1f9b0244faf323f76cc6e22e95ba5dfbf2d85e4c490bff2b72b7e6a87dc41e. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USHM22315900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd26e9e264b813e4c0df9d501a9aa4e7dcc83e2cba55c0857d7f590ccbc2484. 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/USHM22316086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c5273e5e6d394f89d460214c4e226bab03c86c73f76c0c1ee2dbecc7b4a7f8. 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/USHM82361124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35516521f8f4e1eddd98c1f89fa1f602c74645ce1dfc57187ee8ae441e422b80. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USHM82389072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeb7c8954197397b5e21f854544e05184e89c8c696b67d0c238b38a8d14cd64. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USL4Q2329633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6d3fc2f3314cd04b09001d6439d248de110367ce735ca2e353740fd443db4c. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USL4Q2375508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a42c5b27c171af0099f2bace7d32be539b4ac4d5839ae0a909d33ac64080c9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USL4Q2375509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95c813e87f7a5a8e81f24ed975a55e8105fc217a1a7b151bb485dbc228d429b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USL4Q2375510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dc3929e0d8cc8445511e114766c670b4d6557bbf777dd17e314835f268fc7d. 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/USL4Q2375511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1da7492f21df062bfe9dc0fb5becdf110ea637e3ede0ef6ac2acabfffbcb2a8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USL4Q2375512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475cb4d678163e8f91ff889f38f6a9d6493fc1891d92a6321e8e463b171fe70c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4Q2375513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b3b5b5378b2c7b90e6995a0fd1e5c6c7478533caaf71742c0ad5a154d7e97b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USL4R2380549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9cdd66ef83dec862e8fcdfc9801125f6580d3ed3a6ffd3a186d0cf09dfefda. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USL4R2354410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b42dcf9f6e2bc6572c1af50f1089bc116b3cb5e0810d66356bc694da3a00033. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QM6N22471334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb976c1cf2cb138edda64ec5611437bd405673f1c59e98288d1b1805879311c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QM6P42408052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b838716dd2bf5c9a2a9f05c32f5e7a322c6e0adf1f1f1787416a023abc8320. 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/QM6P42408096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410defc8cabb3ef313215919c46459d81e0ffc22f2ac55569bd62c15edfd8178. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM6P42408132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103c399933b5a44eb5461eeb7471ea03858b3edd7afa7688488b0665abd7d2cc. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM6P42408162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b901eb5a31d0b9b36875e030190489f4c2c1a2ac14b09b6b5a5d68682481b4. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QMDA62459886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dac7afcb30fafc0143b7c553da06d179a6cec20e4319f6e8b4cb0eb2ffef69c. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QMDA62459900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dc357b5b7bc9416a25a52aa7f262a29acedc41417f52980a5c4e93fd140edd. 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/QMDA62459907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35630bf30d9ae432ce8352bc0d20724d8f3d7ae5937fac91e0ad0d790304e06. 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/QMDA62459916.