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 0x92567475e29419cd0a46b0138a82758918f1ad82ddf4d8bde4824c2c0c491c72. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4c6a5bb-a6bb-4891-a72d-c8d331d9295b.json and https://artists.proofprofile.net/proofs/artist/d4c6a5bb-a6bb-4891-a72d-c8d331d9295b.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 0xeb9828180a889cf0c6a51107f73faafdfa49bac2e58ba81a276bbdd6f2d425ae. 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/US7VG1452911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90932530af3b631c2648fe9fce1397e78de6171a99ae066f700b6aa76a24dd2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG1452913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc692e249781d98333dc6a938653d00e6d82ad78ec465154153a1a367f2c501. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1452914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb032590bfe55147b193421e2956ee57b6d898a5ace189ff8a2fa3e6ef4e0ab7f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1452915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6aeeaaacf30b2c59833e77b9b0ba639fc6d0bffd183db1d3be2de46cd1567e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG1452916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d40dbc1c307308002526e4868fd4b97d9894978e4423614ff3cb8a037cab579. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1452917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a499148d621b7cb9f316a7313da16d77ecb56c82b2540163d2245da5fb2fc0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1452918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacb19503241150db030778995e498b315f2e0758c2ecb6be3c350ff8473b8a0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US7VG1452919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe8562441d642d6064ca72ccc6cf5f053c1dfcab55cbd66673bdfd4e6eef7fd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1452920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb512f5a7562c2f7e8de853623a3f4cbadb29f8b93179e1e39c4bf6c871201542. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US7VG1452921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f25924971a8308cd412c234f0ba825c5625d52377bf4fa9f0832f1c924ac9f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1452922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5654a78c19a5e4228b1721abd0029ecb4d66ad3534826845566ba77861614db3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1452923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e275391b7c9568b77347732a5cd8d0c818acd0d94c698fe5e28373ed916871. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1452924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae97fcfd002d64a326efd205a8a1026848c26b350384f2e9941f7ba2cca18bd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US7VG1452912.
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 0xcdc63981296d403f842ba939d3311a652b3121973797bc1538a7a2d3a212c856. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US7VG1452930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1aac05d1d81e79c03b6a8dfa0ebd9ae6e0218d647e722bb02109672af296f8. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US7VG1452932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3429d2b79e41e27b25099d31851dc8be9e7f589a0978b7225667effaa8c3bad7. 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/US7VG1452933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82ab526a6e4094d95ac129c4a94eca5baddd4ba12f9f7bcdfc63b0f97f98d7e. 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/US7VG1452934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471fe6a0ae3e082cbaf9faf6cbae201dac56d510136471f0361db226c2bc581b. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/US7VG1452940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cd358ea5d62fb88864a29e417799ec9f7efee3a957cbefed4a63eb3fc917e4. 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/US7VG1452942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7c04e6c9b6ce3b81b1ac648fc60a02cb2baec549f83bcc19b669d70ae162b7. 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/US7VG1452943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4af49e9483f37c4adca2dfe8a11286a67659019e65c73e315e77ce560b7f40a. 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/US7VG1452946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81e6892ea2ea4d5ab8f033d58d324c4f0651876abb375dbbc8d7e8412fc029b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:31Z), 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/US7VG1452948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990b586d9ea71aeaf1f667a170f4b84e0d000b90e424c0d885b862c4aaa58b22. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/US7VG1923199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe50bff77abcc9f35f22fc22542c515e2168d806d3000a2becbde4e139fcaf5. 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/QZHZ32043895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adf0a251c94461029f28c3123387cf46643f90218ecb7a3322b8cc65b3c9e15. 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/QZNJX2074914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e4f581af704ef53db82d47a78aa5807b2e727cd2380e0a9bfb02ba7d8f20af. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BXKMZ2200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1e5f28c64c863eb8e9fb70172104ecc47fcbf377af95b969aee322fbaab178. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZGLM2352603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c160e7ae41eb5e622b57026106cac4e23fb5f00a6fffa3cb3261b1dc0e7414b. 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/QZW9M2404420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3666badf36faee0da8dcd635a294e555e0662d48f96cdf24475b0ee8009e0b99. 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/QZMZ92566561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c42604ccef483f2e3f3e91adb3b5a6957826d969fe93653eab37bee9053f5d. 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/US7VG1438108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2e1a569253775a57f1adce96ce2577300d23436490ae749bea8ff0b2d5f71c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/US7VG1452954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba3223eb894e53e0dca9934d0f84c67d5feeb50a1ef0d44d7ac2d112d84deb2. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US7VG1438105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb18433d870ed0e7b7ff80242ca285787741d06cf3fc20703110dd07c434f014. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/US7VG1526277.