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 0x79e29c2c470d59ff4fa409463114b9b0b5c85eef00a6a10cadd06efc87cd12f8. 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/4d7b37d4-c2d9-40ca-ac14-e003bc2fc263.json and https://artists.proofprofile.net/proofs/artist/4d7b37d4-c2d9-40ca-ac14-e003bc2fc263.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 0x5d1ea8b167bd9cbe6855797700d5379309dea6061d970398030c0433def3a91e. 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/QZHNC2364002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc5b0f0fc4b3cc6db9148188550b4e2b359295d0fce5d8251700938b1041533. 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/QZHN92342259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5f2fa74e832a0681a7f5c82a9c03615cf26e7986c447a493920907386f39a7. 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/QZHN32369262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42393c44d2564fb45443c0d475921fb33e3af5eb3fc5b1f6754550c1d613664b. 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/QZDA62354889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae93eca486434063311058f6ec3413dd3ff349c74d47fb073f4766ca165a5084. 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/QZHNA2224137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623bdf0a28a19201261aa3fe1a06d2ca9626dec1d927d3086198b39098bb87c4. 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/QZHN82208366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c2b99acdb3e198e385e1273a93239f0a64fd23a0264d92445b5008d466a06f. 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/QZFZ62263529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369262d0fee4ee429608ca9d55b0b990a61e61f7b95d6bde4b982ac5ecd438e7. 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/TCAFM2190900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d935dff85ae2ebfa3d771d784e31a359e15e73bed2ce8ad2daaeb522d12100c. 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/TCAFH2088750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ab8af49ae810b8c48bdeb977363c70eef8372016d39a30397ddc13492e5bf1. 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/TCAFC2036717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3af73bddc44c152bd1e9c37e0467b4fa8f728f603b007b80c655dfc3270a27. 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/TCAFA2022163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a8bc909268d53307d25cc15a033a21cf4a73c18c024ecc8266af0b69544e3a. 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/TCAEY2006076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc25d6d2fd943e23739b5be2e82d11ba8b1a3e9d6f6087f0748c943680dc8096. 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/TCAEW2014945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9a933cbd4c9ae6a4d2ffe5fc358dbbe5a752e57e6701ab16831d3c6e6e5f47. 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/TCAEQ2076593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e47cfd4bd5dd61e56fbf588a11ae8ac6cf8e99a532536d02b19ad682e9e9e8a. 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/TCAEM1936099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa479c1b8efbf5fe1d9f5baa10deef2c9cfcf408fe9495cc205dc60aeabf806ef. 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/TCAEB1965846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42cc04854b92ce789fcdf4dc0c3123e7aa414f4b4dca2cdf7e5094b6114a209. 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/TCAEA1801095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428e8a5e58d1f1a95b1169cc2fd1e769afa61250aadfaabfcd2276f7b9205f8b. 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/TCAEA1800703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c34a665f91b8e1f5ed6283da008a55f39d8526d3067ed313f6b966eae0e6069. 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/TCADZ1851965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024963de02f775a252fc09eb01711c6bc4bbb30f78a2bcd606f674c97fe633a8. 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/TCADO1814999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c43b57b73ac4c6f62c1b137f26dd33d12973dbfbf86104402b062652410a3a6. 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/TCADO1814966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8071c9e8b559d03003423ebfa40ce2ab30078f25c714f18ab29076cb94ea58c1. 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/TCACZ1715317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf09692bc6850be06d0c28f3370153a39f0a371c2bbc462bcdedc4ce9e130d25. 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/TCACQ1630680.