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 0x875ea57d3849207ce82a194179321052f43cb1cba051416f69743f6f3a0c16e7. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb62000e-3b24-4b64-aefe-9586eb49a859.json and https://artists.proofprofile.net/proofs/artist/bb62000e-3b24-4b64-aefe-9586eb49a859.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 0x0e2149244dc9de76a3f461d4adb9130fe55ee2616cf2ffe2a6a9c63759d568c9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES72109587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaad3c7c3ae1a5c780150acf6549114c415e53084414f2aadfeb5fa0a1cf3f5. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/QZES72109588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fa03d42480516ff14892d12e3f1b5fb7a4ff5311abba5a58f2e4ab69c75977. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:47:18Z), 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/QZES72109589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134bcc0a58ca7dee59a5fa41e59cd7c66041060f6005a565a947e4cb52910040. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:35Z), 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/QZES72109593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502486dbce3ed455f7e4fd0292df4109ccbb5c61280051eb67d54ae46b84d530. 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/QZES72109595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deb5186d5631c6769d2ef907da97e10738a2006670d1f32df8e18d3244fd9de. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:49Z), 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/QZES72124663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6f69e5830d0ee38b60eb5fc250ee41f11da5e2c1eb93a2f96f8dc4be817826. 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/TCABS1491579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2085e8e89a1f859b17bc1c15240e451ce345e70ce8b160d8918d8adcbfd30c39. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCABS1491580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533b1df9331fbb01e397361420e3f73089a3d25785eee4e86d71b896a10845b5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCABS1491581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb738128e7269736c7d7653588cd31e95e1d933496bb1e3cff2c244b100e6a0f3. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/TCABS1491582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c4d30a59d8b4aa963dde1a50e53fe8ae5829aa58dde9ddc1d5fd9c4964af48. 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/TCABS1491583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa939c7a140b557f219bcfb5542a6bad10bdb2a803b5332790498144c4c3183d1. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/TCACG1511095.