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 0x905544609e28386af796736b5e1cc62ee9455aaee1eb95e35718164dcc94070c. 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/55c4419d-b79f-43c5-9926-cdcc817d60a4.json and https://artists.proofprofile.net/proofs/artist/55c4419d-b79f-43c5-9926-cdcc817d60a4.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 0x3b27a4cb56ae87811f93d5e845b1d156fc04a829e6f139b6b06362c7eae20a50. 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/NLF712106303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20527bc38121227e87a548a9079c163f653c38e406aabdee603b253dee3494d8. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBSMU0015296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8192fc03dd1fa7d6322e76a6b836e35f3e26e3ddc3c1976cc71a96ae46cc33b2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2300887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f6811999bd90c1c5ec8f9e56fb565b6808d5e2992368572bb0089a139d2708. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2300886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432e8cc2cdcdd6d9aa0a90fcd9fe2548542ba64f6d6678bcc6459313869fed43. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:09:34Z), 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/QZWDE2368648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac33c136df26a6ebecae94da0471c792e42c7144b5ca607a7e4823b9946e55c. 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/GBWUL2093114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c67b809a9dee457a0c6925743f8f707c93673bd54955fc49cc690881dc6bd3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWV32411248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9539ae18cc640990f02306257e6baf424957be1ab2ef5cbc9b4a912de40cacb4. 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/QZZ8A2418355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e4e9e823df258f25f1a103a7d961dd4bcf60e894a41d098931ff17b7f4a271. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/GBRKQ2575529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b601e9ca76da2a15eebf2c1b755ba269cac5bcefe47e1d9d3468c92f6c98aa. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBRKQ2589566.