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 0x5c1760f01ca08cc8475b48599ac652fa477ccc31d1ae737e5bfd61d8592fb1ad. 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/a13340ea-709e-480a-a8ba-7bc151745187.json and https://artists.proofprofile.net/proofs/artist/a13340ea-709e-480a-a8ba-7bc151745187.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 0x0e7a8e4fc804c0158e6a2993a12a8c7ea37820d59a889b43bd1f1a1caadc32ab. 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/QZMEN2224415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8d9f16c1d9fbab369093ed2217b5bb735c7457ec23d84ea9023c1acb4be0d9. 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/LTG611900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6204d42dcc0237d7215f730c04e6b1f518050fd767000268b52f5a5309dadf92. 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/QZHNB2030656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef90ec06ba24ec5c1b0bdf05a8ae26f02508597c3cb528ef898242667ccca271. 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/QZDA62362277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b0c25f04a53df71cf072a57f756f6333f128564b5e55d6939a9a4050d3c485. 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/QZFZ32071392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb420cecd3e94ad4f996eb6d42d95c3381f20b9adc0e3039067fb9d400d9267a1. 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/QZTB22213376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a10f1f0be9c3e1531774f51a32eafeedb088518ea62e9c0eeec75150079ee9. 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/LTG612100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a3132b006eac5d73459df7db1eace53bfab2f3116b4b9a713f35a41b1dfabc. 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/LTG612200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb79b08b37e8fb0f7f48488d46f35c2eaff4f4955de314af6efbd56572439751. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZDA62362278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30160f46718f9dba8048e01090c9c0dd0e4b39d9f1a65c65caa11aaef6189d5. 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/QZDA62362279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4aa4b4261f5861c64957616457770f4995c1fd170b127885515a6dfc41acdd. 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/QZHN32066481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae81c9e71f29e7a376f3fa262860b4052e173f57e6f501350a8bb3868374b14. 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/QZHN32066482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c7ee37a07b3fbbebb5262ec3dab3c6a4fefcf0c656f1bcc5763256db266b34. 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/QZHN32066485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b89288b6504bc4116666fa27a26abfc5d32c3f25ad1c79ca13d9e24e9ecddef. 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/QZHN32066487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3191f3a3d0a3b3c6c03790f60a4706ce772b234bcdbc7cdf767bec49a3f48ac9. 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/DGA0Q2429381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581b2ccbf2ee0611c22a8a4d8daf125b1d8d8b939c8f5f580e67ef25f07f17ed. 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/QZES72459921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0c1cd0deb185e381934fb81abe5d0ae5bd0604cc3b759fd9d1a35d52ae7b91. 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/QZTAS2311914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb420cecd3e94ad4f996eb6d42d95c3381f20b9adc0e3039067fb9d400d9267a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:37:43Z), 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/QZTB22213376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7a8e4fc804c0158e6a2993a12a8c7ea37820d59a889b43bd1f1a1caadc32ab. 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/QZMEN2224415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd223ef2ef7b0b7528e8ed99b100adedbe0e0cdcb2ea064478868a78ed66cdf3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:52:44Z), 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/QZHN42290170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a3132b006eac5d73459df7db1eace53bfab2f3116b4b9a713f35a41b1dfabc. 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/LTG612200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a10f1f0be9c3e1531774f51a32eafeedb088518ea62e9c0eeec75150079ee9. 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/LTG612100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8d9f16c1d9fbab369093ed2217b5bb735c7457ec23d84ea9023c1acb4be0d9. 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/LTG611900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6204d42dcc0237d7215f730c04e6b1f518050fd767000268b52f5a5309dadf92. 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/QZHNB2030656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b0c25f04a53df71cf072a57f756f6333f128564b5e55d6939a9a4050d3c485. 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/QZFZ32071392.