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 0xc61037f2885c669e3bd0d21c1351db2bfbf56050106f7f0d570bb76967f83d82. 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/c93bc3e7-9e26-4eb1-90a8-2f83099e0922.json and https://artists.proofprofile.net/proofs/artist/c93bc3e7-9e26-4eb1-90a8-2f83099e0922.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 0x7b8f76d9974c2075a552a8dc377c93a7cd16fe86e2e4583c2f2c981b98cffead. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:35:19Z), 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/QT6EA2598709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6369dbac7f85decdcaf6069fca9b804caae13ebe15578eb1c73eec174cca51be. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT6EA2598781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2494de848af85c01e62493d65e39f19b32b7194c067c36a37fad08a588e0a6ed. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:18:01Z), 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/QT6EA2599186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1344b29df9b5a798159ade8806a079567677fa4790e5cf0422d11083b1a5f2ae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT6EB2509547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c75232eaf5799edd4f9e5c0e7fba31c7f45e46c7344b43415b55862cf57a3a. 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/QT6EB2509641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf76f477ef42c4ae17a42a6f129f965dc329d2bff706eefee5bad5ea9deb7e1. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:21:39Z), 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/QT6EB2509522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e20eb1e286b84588d5f9142ac6f9bb0744319b38dc1a0d1c3e1f453d3417c27. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT6EA2598631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdea74a8afd307cda3d40e20a4d68adcc6da884c87bbd839ad13bca1e6cc93e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QT6EA2598632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6007eb2d6ec801b2d27f98c767cd5687979c74023da0511367db0bc443b101be. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT6EB2509554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e857ade716e28f34441a3946d078ed77892893dbcb8962c1262659b7fce1520. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT6EB2505991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3d8fc0226e2e18b33141bf85af5ea28cd9c53b3d0d720ed187df066166c62f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT6EA2598798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260f8d904d2a072bea45886eae8db5f603566a60415ea8fc412a9d0169e5d7ee. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QT6EA2598638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b80db3098ac4f6fd3b0860765335305b15a3d4b971a7e03621915c6c0c8d809. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT6EB2506285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021cfb7438d6d6b5f1a8fed73f37ddd0f63a35916c5ad8b8987aca1a543db21f. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QT6EA2598972.