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 0xf229a7270443e8024dee7bfe5a50b90dc3974ab45a234cf8733abcdb20047f4a. 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/a766d254-fa79-46bf-8bdb-898f4d5f6f62.json and https://artists.proofprofile.net/proofs/artist/a766d254-fa79-46bf-8bdb-898f4d5f6f62.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 0x3ac4b47fdee8bd93844246fbe81e3ee684548729b072bfb83fc3325097293a68. 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/USANG2229889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940639299b228fd59fa91c5c07d87ef5b7eda7d11737539beed3d1183a9aed70. 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/US3DF2251726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085238b344ed260fe51947c19d7765f4bd25538e71f4f68a68fedf8d80160c6b. 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/TCAJH2522449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93ca8e2c26e799be84d0ba116caec368aa637e0f2ac26cabff74d2520f13f75. 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/USANG2190608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d6dc31c9fa3b65558882f056aba05687b1d9916f8b1fa75656e98d44a0353d. 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/USANG2114907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb858f8dedddf3bee34900175ea7b7a789a80b6f62ff0bc2c0726b4505e9356. 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/QMANG2216629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf713486ad9598e8255871989f9a40de3ae496d8773f164bda2404bd0f565a0c7. 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/QMANG2216640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed78353204279f214b5057924422ead30acae0345db089fe6076801f5f871a1. 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/QMANG2216654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5146ec495bc0a7d19516606d3b773a56e8bc35b3f14b823de1edf131188a8963. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QMANG2216625.
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 0x4f3a4749f47a7c6c30a1bbbce4f0f6197b85fc1e94e851363df7394566fa77b5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMANG2216626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd33b1d93656c85d7761e6b4f980cc5c4fec1e14dd4ea59982bbbb0b651dbd7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMANG2216627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb661f0efb6db28c33a6f8dc85ace41a66e71701c69e81f7e55d90d906b3993b9. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QMANG2216637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfe652728ed7e65ec4d0eaf4a1da842026113c95ebf9833471bad2886a3009a. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QMANG2216651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6193e1633b3fa5e7e09e8f0ba9f911de075b42a07d93759e695a9ffb34aa76a5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMANG2216653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83595293404ea70ddc9d5d3b53bfd4dd9121a225f3fa9f365acca0f6d363e91. 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/US3DF2519173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c0393dde962e368461eab41ac8f1d45794118f138a2b7b5e4578946a8c568c. 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/USANG2468812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5599e8d63680d7ee5a2d052d92539da9bf77f4c69e83dc2701027d4ba97536a4. 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/QM6P42488035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37036c44f2ba301a8b10491278a96d2fb3e35b3d57e128cb113137e96addd1f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2451513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa682ff28b243d1f5e995ea8c87e943ab5eb6636a86b1da8a806e64c154454992. 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/USANG2295382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed38ef97b0e9d66e64940d23334d6cdd7f3d17e1dbac28ed0a5175f048300988. 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/USANG2255550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd942f98b20f690a4701c5da84a542c2e162f6371d1cf7336eca2dbad1cec2977. 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/US3DF2247006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdf3cefd9423eeb16e5f6f355935325b901d9a587831185e4f52405f4c201d0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2239685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c35a20952f9722b0d1ab8c201e54c857857005d9b68bbb5b6b53df0ad96bdfe. 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/US3DF2237987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf78b582eaf5de3fe2d8155cfe5cc422e5ffa967199e032965fd8bfa3cc3451. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2209670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4f8261f3ce4c13362f708f160e19ac8bfe997be61a7ccc8fafdc69f62df2cf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM3DF2108347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3794897e35358265d0983503c543a8b4be88a693620bedf48b5814218e4b65. 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/US3DF2179572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20a780821904c049cb768f48ad7427252d3688a65511637dfc14b411e354e4a. 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/US3DF2178090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2f7674f2534e34968efd543d0908abcdcc9dbed30c642664cf3438c75bb0a9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2167507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c368ae34ffdd61b295b7cd73ef421df91cbc105f44c0026c541f43dda4e60c. 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/USANG2198933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850387c3718b286d692ac25610b9eed3b99fdd6c5dbacccf448756d543e7bfbb. 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/USANG2172968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819fc33c874e85fe778520e2fe9a51f5feb8aaa0ac3d6b79361644fa9433aa33. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US3DF2035085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341f6d9f3977654d886be47e80012d599f977a7d8b461ab6ba1369cacb76f73b. 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/US3DF2092454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f0f845445e61bfae3cccc3846b4e1cebd2966bc27cd16c0a2c63802bc87a87. 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/QM3DF2258405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0df11874020c6a3b7f1d9c98cd8736e657bdc50c196ef5c5d15245005d5fd5. 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/QM3DF2184525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5e0783e0e76186b035c408e18deacb05a84721a61fbff1cc7b6edfe3824e3a. 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/US3DF2065666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b047e4cee8efd7ba3a8bf692f56ffbbdea6a7140325b509a01dcc31211f350. 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/QZFZ62153998.