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 0xfa65c47f5d934c0bfeb0a8b6b59b93695bff5f30943e6b5311cfa3afd1ee8d1e. 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/5a1734b7-6295-4bf6-85eb-c432b08a7e04.json and https://artists.proofprofile.net/proofs/artist/5a1734b7-6295-4bf6-85eb-c432b08a7e04.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 0x0799e8f470a565a77fcd63d5b909c6c8430e33196d2dbb124cbc137ce9d349a0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARL371200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e19fb7d021cad596b1e50e9ac2f6d5eadb367d5d4f7e89f9b170edf38999341. 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/ARL371200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3c8c6f4970c990a379f7147708cf58e8598a771dbc12afee6d72efcacf53fa. 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/ARL371200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fd2e5307b5b502f34652aaa51e21a43eb641d5f5e20aad607e9d9ea282ff79. 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/ARL371200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0e9474956676c35cebb8d9831070a77f3dfc82bd806045da9e3433a2772f33. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/ARL371200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be959e7ebce5288d12587aaed561de15bedfeb37ae424f4571ca1244a0ab608. 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/ARL371200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b19af1d15967fc011991a6642567c8254ca2c915036c93dacb2ceaf71d9a981. 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/ARL371200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73208d3a1d43cb21c2711dde9e0298dba296b8d82e244680335af807625bd66f. 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/ARL371200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe823a47f0b10e7ac07c78e48fea99dc7b4e22516c97b6ac8baf038612bf7af6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ARL371200005.
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 0xd1f546376688e894ee659bddb555d1ae17f39f5f5a91841c500eb75ced62d86c. 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/ARL371200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708640fe421e3f1f3f031e77c89ac819034be7cbad35fce3a1ef11193d26bccb. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ARL371200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f11837c423063351966723471eb1880d413a3fa1c65aa12e48ac0a352fafc71. 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/ARL371700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e519d97391883a48ddb6e6ee7d6b26997465a9ba9e2138cdcad592688d07e01. 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/ARL371700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2083684327bdfc33e321b3d9059cc495db2cb8b7cc2e266b5e6fd9e484e7262d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ARL371700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7c9aa3d6642916ee82a5541ca4ffbd6ada7ee91983bdee48d4e48bba2cc7d3. 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/ARL371700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ec41b1b76eddb66184123debdd553551838935cba39c59b35e53cfeeab8dc5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARL371700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a7da549e9ec036a530d75cb99bc770c154cc12e9099b4ba71d96c20c27f759. 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/ARL371700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7be442f5b6b325369a91dc8a602d5b2c4bc1495520817d8680e6187abc49b2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARL371700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ed3ed0f7019463d4fe96b3623a880940afc4dc90efc9c5b7b23cc65ffdde7c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARL371700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf81696bad8482b514f4a2856405ef4d8390a9df899bbbbec80c38678fb717e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARL372000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17edea9f71309d29f0d3df950d035b1326d1dbc09582ebbbf6e4cb869fa96c83. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARL372000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd982bc6471e9c04e512d9de898a26b9a450edade6e5bed11fffa7f77571d1e8b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ARL372000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae9781154c1c08ef71599d5648310d5bb0adecfdd58cfa896dbb4e54ed3915. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ARL372000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedf0d8a337f2a7a364ae03205031618d394ab5569c32bfcc1674390eab45466. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ARL372000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5040876f38fcf9f44059abb55189834570784cf4588a9e9dbdb732f28654d6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ARL372000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d03da81af55a90cc49bb6c67b294bd8c210d0769ff12684eb03f5ceb962f2e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ARL372000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e32ad1f64615c71c92e63550ac44bd8ff37b7b31f1434dfb4dcaf4093252c59. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ARL372000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798d9e1fd6219bb3fe3d4715ab1e863a6c9d02abc31eaa240391d9af67631b95. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ARL370900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b19381c5f3f885436676f3ab36ede3ccef5ef04c3d90e4c78fd4b95686a8817. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ARL370900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025509d3b7f448df2741dc271dad5742934a72c0d680a63d8ef700bc8d1ffbfc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ARL370900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abe08ac3d5a5af5ab6394f2f80fb84bd6ea504a02857db1237ab95c998ed079. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM7282110979.