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 0x2470cd376bcfad3be20e024da3f3569b5808d665ee7d1732d738c7c490bd5d69. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0053ee52-d679-4862-8f5c-0e9d0c01aa69.json and https://artists.proofprofile.net/proofs/artist/0053ee52-d679-4862-8f5c-0e9d0c01aa69.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 0xdec039eeca26905d28607806c8c33dba282b643a8543e02229a2770f45099c6c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USANG2121220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750972bde5809113439258abfa8974de59b6cbd7e090ff3f81517cecba2e97c7. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BXIV82124600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617faf922ed56e98be7a6269a950841f9da254030d68b03b82ea74aa25fb545b. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BXIV82190429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cab45c7da5f030136ee4f3dbd70803f49f6c1e5e801e2f3683ef90765c3d959. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QM3DF2174215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86464a49a470fe03ba7ac51574f890a8bdb51452e06ead931e00cd15c551f156. 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/US3DF2206642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2ecf57c75ca59dd7272b0f87829757331915d66eb0d13e871b72f6b06dc2aa. 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/BXIV82267708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60332f472230aa051e21084958f08431d85ca316a21ebb0e97733b215a505c25. 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/BXIV82253765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6ea00a1caf520634502f2b0a82e2fa381e20f34827a457fc344e42f2bdfcf1. 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/QZNJZ2386155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0efddc0788a67cd0018bb49f2dcf1e6b82029d99e999402fc00d23f027b83e3. 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/BXIV82313647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc87d7f5036fb2b5b99733071d0826803c7d3cab65bff05ad80e2e094d956e1. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BX4IU2350409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af04d2959986637838374c960f355bcd1e8c0da79aca8dc4649b339448c54c6. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZTPX2399025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235df51d1247d8f2ca7f94c16828b603ce18ac6ffaa135e74e40c4bfcef569a4. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BX4IU2352440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a114e3a16c0c3b2ab92fabfe574c7924b92520279d8a10bb87250b80c32eae2. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/BX4IU2353409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ded9e7bec27119da64829ca8cddc7c7ceeeda100e36e4ef9c5da7a427de663. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:18:56Z), 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/QZW9K2387756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145e84c54838ed52a816176a6cc39b142c832acbbe3a11300669424f48ad8453. 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/QZW9L2325296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4450ae939c6a1cab7e4575a14065a4485866dbfdddf100a5b9dc43db6ac95570. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/BX4IU2359724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca598cd33c6926e1d887d180aadefb6e3c94f70da18f9c129d02e7a7eb886df2. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/QZMZ92413358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe55caae8c0fc6fa4e19e1d66fea3763b425cb0e50023304f7bc77fff6a3ae64. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMZ92459622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755746f6f79447eb721a0b08a3e2f01fd02b8a2939265de0d0ab774d02ca8b06. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMZ92473258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc7f705cd5d71d514ae889bf4b31237ee169a715caa2a135a1ccfe6f621aa1f. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BXIV82483786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b547b51ff113624b5175d2f5debc9252a8de9ca06bef7b77a9b8e8eea8ee8. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BXIV82463829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3145f32a3d3332a386edc7a31cc70ce8cf2f249cf5f3b95b8a8aa182cf5cd215. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BXIV82430685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6921a8be6ef8e04f6f6b131494286ab13cedd29ca5872a17889b74744780e83. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZNJX2436708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88174993a8e57fb9b33eba3050838a61152bb812571252221f36154dab9b8aa. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BRSVB2523616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84d58566f5f810e12701913c7dd08d2abc182c40e8a2b0fd3f0f7b1e4f34bb5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT5M32507666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf02cc7e30588a7b79299dae77dc07da2d282d8e4b46f7c728ec8ec76e874d5c. 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/QZTPX2403632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6e2c53b24d65969f345aa63942bd8cd36bfd94aa0ce9885072aa4ac95af95e. 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/BXR5H2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8710015928dda654805a3f1787e45629b6dff5ff9a1908fdf43647c68956f1f7. 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/BXR5H2400032.