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 0x45c145022c3593dc7ae9b232ff2d82c34ae7694f19e6ff40a533ea9a5fc56744. 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/f03da947-122a-4f95-8307-2c1cd132f464.json and https://artists.proofprofile.net/proofs/artist/f03da947-122a-4f95-8307-2c1cd132f464.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 0x15ea36a4598088b93d72ecd7bd2091e309a4959b5a31b773c1a5c35cf62cfd50. 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/QZ4JJ1825060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902b866fc62477639a79cbe0e71659e4248372c6f54200c21ad4715460605328. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ4JJ1825061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc2d9760c622d89e2d60e8d6a933b96b2436e6f1509b5999989728d9b21a541. 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/QZ4JJ1825062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558daae933cc112410c5f4a4be0a62f5d6bcbe0de98e96da07e5ca4f3c97e5df. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ4JJ1825063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4242c9709f3a6ce6c327377633ce76e41a706b83a4cb86099f9ecbc2cd7320a4. 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/QZ4JJ1825064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a4735dddad1a597f329fdefc6f77c65131474332f0a9f57b41db7f2f0a07df. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ4JJ1825065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a6270576fd9e6bb8028072457a39f656b5eaef3a4b8a43620327270e4a6302. 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/QZ4JJ1825066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed77dc2903630c02a1667056733e6fbb64f5863901e75a3714fd2f19446fd1e. 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/QZ4JJ1825067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd72ac325168f0d828e31692144b863fa2ea97c3f989f4a33a09411cdb959ba8. 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/QZ4JJ1825069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8888ddba6d09bb9b23506664a6262eeeaa649ab02baead352be5ab3b54749fed. 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/QZ4JJ1825068.
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 0x293ad91478b894fa438a30dc5553f37880433206acda688563e7298429085aec. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZTAW2307673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db6622c45b7529a3e7acbfdcc875d7e520d99078eb2400431e80a69de35c0e8. 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/QZTAW2307675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a78b460b7f9994faa868274c9123ef0ec3f8706b2ebc3e323f53aac366826ef. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAW2307676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c337cc736250d20622e103e3707d7ecf7620020e97c75d6b5bdd7b26296f037. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZTAW2307674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e032902011cea8aa12b86e1ac4a37db764a9d673bf3f452472e6195d903308a. 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/QZTB52267188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcde79ddc9693b397de53087eb587dd9b3a2dc0a582a4d9c88a5ac56cde475f. 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/QZK6K2286654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db4afcb3702750a48a2d7fa9ecfa4346f472b2c46bdee35db7de995a1110753. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6G2016058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f8a3b94dd27d62ae4876c3796268ccad6cb780cc242ecfb3bd7d9a1b4b01c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6G2016059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd3dff787f8d2f90d51925e07fc1a110cb3640b13de062b2663fa47f536e045. 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/QZK6G2016061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744852cc3efe6e20ea9cc2d58c53eca40056a5138b5908510939cc081eeb9254. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZK6G2016060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696b8d6172fe57707999f2cc0eb037d596cfa96b73b656de68ac634d449b085b. 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/QZHN92075651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c63a184b34e6506e40fa2bc3999fe0ffcb6d80e8da1f5849e07d94fe1271d9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES62041845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbb714fe30f9232d2ea1fd2acb8474f884d81f4cf1129787f2db041f3578d54. 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/QZDA72056952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6137e4ec66de1bd782315c5446c20a7052ccd9089c920a4d1bab8df84bf4a027. 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/QZHNC1973755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778018bc9f10ec8c840820c217abb534f1314c9d32f1c3e85bc12bb833e7f966. 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/QZES71852478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c66e06930854c93414ceb5ff50a6c606960ea7e03a92a4dc587cf3b6c8c29a. 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/QZNWR2134544.