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 0x9202edd6ce1570859ec8b26269fbaaa3cc169af9a79a4a5e475633eda1b5675e. 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/66819e65-5417-4541-a8f5-95fa5f8814ca.json and https://artists.proofprofile.net/proofs/artist/66819e65-5417-4541-a8f5-95fa5f8814ca.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 0x311d0b4322724426142002fbfc8fee14c87987935970d39b1b9edf491ce1575a. 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/DEWG81900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1fa6675c4899cf2166a533f5590fdd725eb201484c17cba92c6e19fc4f5f51. 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/DEWG82000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084ece939e621a03bde52d6a2568338962439ab3038ac5f6189cb6773cbc2de9. 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/DEWG82300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe639ac84b0aba032f71f59413d6b00bf5b85bb096826996375908ab8a0c674. 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/DEWG82300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884f98567d1dec430d3026af5ee4bb092d63434f86a37e9bf821386057e6f54c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEWG82300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e97946db15183d47a710b933e06023514f80fe0478dad09822ae5a355302cc1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEWG82300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3be2bf9871119dda3e0a5795d7e189ad4afafc4a1735663b2fa9645c8887d0d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:30:56Z), 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/DEWG82300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffccec71fc3ce70b6821f80a75718eac6815ddb073254f5f5311c7cb2b168826. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEWG82300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24992d472317cce70de5289d74da7a41f8672d4b0a234b61562f3225c7dbea32. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEWG82400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce94b41c82593697f13a40aad8cbb77a8909f7724c9add997e1b8cd90e41aff. 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/DEWG82400182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab5eb6311bb6486521aa9bcb7d626bce67bf004b3c8d0bcd9154f53c15e9e99. 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/DEWG82400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca7392cf4a3b0f08ed8115e2c6341970a066171f07dca176bc950aa22997a34. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEWG82400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b96713388076c5e0cd079210eb5682cbe31e0b7f567ade67ba33568b5b9a4ec. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEWG82500125.