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 0x0c14b351c95c9bbe00d44b6b9c89448c2ce5e9b54c1e735d9753c983d2154060. 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/386d6834-509b-4104-a8cc-d128765779a5.json and https://artists.proofprofile.net/proofs/artist/386d6834-509b-4104-a8cc-d128765779a5.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 0x0a00c04dc099bff25d84758e521033ab916a4abff4b4f813437b741e9a53104a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWV32364160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb6ce20bfd6f1050d0f53e05a578d394ef0c360582681e2fe50ce4459ad349f. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZWV32364161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4408b8419f8a2b984399f3a7d09e450a0fc84ae96efaf55cd66ed80390c81dc. 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/QZ5FN2433382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd54b53244aa93fcb8fdee50aac61f1ae0e3741e68824a8e27040538e9fc928. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:58:48Z), 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/GBRKQ2410166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db03331f333dd8c41a360bb9942b14626bb71f0acb51c91f835569a6111aacc. 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/QZTRX2419908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0f9f918c9d89c6fd583fc4fb0f19894701ab9c5acf9bb57cfeac7f1501b810. 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/QZWDD2437022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ea55622579949f9a9cd81620bee3e291a5e12c0c1ca454624bac44680ac53e. 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/QZWDD2437076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cd0f5948bd83274635b83febd98dad0538dd7abfeab71e8a814b3eecedcd6c. 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/QZWDD2437162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309f446ff47455cdd5e73386c71d98ea3cd20af6c114420c6c93bf1eefbd6189. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ8A2464056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d9dc3a4e6513739864690dba43de265909a074077e2b8a1d792fc505257e22. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZZ8B2467989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309f446ff47455cdd5e73386c71d98ea3cd20af6c114420c6c93bf1eefbd6189. 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/QZZ8A2464056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af7bfcaa1d485f917576be5d4695e50efafdda95a8df725702c948d6e4da4ae. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:41Z), 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/QZZ8A2405226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859d4579e9dfc214e8140ca496d7702791ad2a272ee8a7eb88bd7209e0732039. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ8B2467998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7638fbcea070fa1b052fb2f2f199446555ddd391cdab310f3d2b5e1b303ee8cf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ8B2468000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed94eedf848a064b6b00f2153e3bbfc9002c059d559fe58f1ce5bee82b09996. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/GBRKQ2510930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00956ab28ce53fc9b61e72c2b2f58bfb6dc2fdb66ab077f3984c087e1e76e59f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWV32557447.