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 0xaaa9b7129eae824058eeacf866138131f86624e2c451a624e4871693fd465a98. 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/24e978e2-a27f-42b1-853e-fb19b5e1ae83.json and https://artists.proofprofile.net/proofs/artist/24e978e2-a27f-42b1-853e-fb19b5e1ae83.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 0xd425867750ebcbce9f38b0dcf26c6cf8799d30e58f99a9a992c9e26fdb39fbaa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADQ1899861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5698f67ec32071ebd72a7634cc9ebebf94bf7253b048d273a0cd2ed1fde6c6d7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADQ1899864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a85ed5b1e197a65f7926b7ad3c6c54981c5b0d39aaefbfc63bbe4ee786beca. 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/TCADQ1899865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12c68d8d46f7e208aa43ae2acef5db4a8c5dd9662c0a96389db3ff92a38cbaa. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/TCADQ1899870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca49f4c14bc230aea646ab86ca882af90d2f99062d0a0dd60fbf1f991650bdb. 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/TCADQ1899871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846630fdc0ab93c0b217ee7b98e11550f8e563cf5037e7cff6e11f9958d12513. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCADQ1899876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094b5757ff3bf025ab94605079d53e21b5818bf4b14d689ffb1a13ee0aa74c05. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCAEW2007869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020f5e469098691e02b75121fcd5c1a88f5baa19229abdc4b56cb67990ac05d8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:18:48Z), 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/TCAFJ2195783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753c7a41f62bde489e026369546c6405af1906ad83b051a2354ef9eb10cb39cd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFS2150305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6105bec164935e8d54264505e0ca5f8274d0763f28088aea2a052676f850e7c. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCAGW2302524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1ee4b2bcf99408f9d913a0b701acc4ea6d5a4bcf0049e57994d27942c4635c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAHE2315253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9523c905e7963a663beda05cb94cf80942c7be9c8195b0221de8643d143d50. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAHU2487266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb77e7ddb1e876ac04cd4ee941e74f5166982a8916be3d55c99a90048f26fd6. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:28Z), 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/TCAHZ2453263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7444fd0ac3e2ca7ddc9104b6ad9102e576e37b9116c9ea762d2715e5052f3e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJF2520250.