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 0x5e236c43fa18dd44b8af5498d45ecf80f486d72acd6fecc615c9cda015c9923b. 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/424b6a53-3bc8-4dd0-9fca-0938f7a6c386.json and https://artists.proofprofile.net/proofs/artist/424b6a53-3bc8-4dd0-9fca-0938f7a6c386.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 0x3ca2cf5b0e85cff4c5e71c3d234c2c13048ebc631c4c2234786bd91f2c0f1662. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:08:16Z), 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/QZK6M2170471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7795f19a51f8e8207befe023793b2031e5fb1ef8fb517533683b83586ee970. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6M2170472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ea7a611fef28fd3c2bc10152874709600e198c4edc815a0078ea4ab9446ea3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6M2170473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccc982bf6d6d439190048be6b665e374d3f002581041918d38168837a3578a0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:45Z), 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/QZK6M2170474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e60044c31e1d1dea68f603bd6140647e29d5d300ce204a3affb13622367241. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:40Z), 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/QZK6M2170475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d147a5740b4b00a47de7a06689081017773a67eddca662ba7eeab898ae23c2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6M2170477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b484b3096cd185242e1e4b7187952a4239f65287806b3188b1eb34854a8c573. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN32312842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b70c823cbbda39277e24c1cf813479c56b6c51f0100ae273e2a29009015372c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:41Z), 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/QZHN32312843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5a097cffa782987e0555e3b81b05cf755c14466b8a8692a5f558985a367289. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN32312844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4de5139b5d7b30ab3d566c0f762c062a5f35af993d5da70b4f508d0b46102c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN32312847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312a4223882f4dfb023aef393b6480e8f45740a8adf7d4a9dd09e6bd14a8f45a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN32312850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1921ec775cc57627f69f5f0232083df9f6e7bc1e9068a3b10aaca98f89424901. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWX2474095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf31e4058cf10197630aa122914a8e4c7ac80bb090667b44a8a4413ba12f1583. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNJZ2439537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d30c5e5d78c58555b940234a64d4950772e70ede1425e0fe99ade575b3e1f9. 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/QZES72419704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba6654fcd4c67debadae2767a4db9831ab2fa34857f9a1d7ee6406ed76cd7dc. 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/QZES72419705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a35c857107f391a937414f72cf3f926b76786feb58a90b8ce68e7f76aa5370. 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/QZFZ22140478.