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 0xdc7b766ac1637b5ddda9cd152c1e19712cde50ea95b9127be63175879d926d8c. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3289ac0c-0d0e-4ddd-8935-c596a9fb4172.json and https://artists.proofprofile.net/proofs/artist/3289ac0c-0d0e-4ddd-8935-c596a9fb4172.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 0xdfb0876c985e39ef22549f8ef40302676fb0d436a0b79e56f5aabe4b5e687961. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US23A1533064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff621dadfb616d5d0fff95de6504e3e94668e5e3884203fc4e6796a60069e45. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US23A1560287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e80354304f0d4404a22c5b53308f23f9ff44a0156d6238aa51d383f2e3f36aa. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/US23A1546574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1b37d9246a340a02f9eaaded1103ecbf1b7d1a0fb40bc4b4c71e03a77595db. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/US23A1551243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9871dc62d51a49c771fe710ca464f876e2ddc38dd0982abd08075413eaa7f0f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US23A1551242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa384b2f652f192e4c6d96a9c1c6ba3f18856267ded8a742888d6f648eeb6c192. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US23A1533062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd7f133163a576bfc3b0e53c675f8b71d69bc7b21cbf74dc9191e426ba80a79. 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/US23A1588488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c72b12fc198b31eb93d60092f8d6dff18de5078f2b4b7b050d8134a13865e27. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US23A1588490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021ac5128a349eb0ac22162122d51698354b797469f3db41db8166294565233c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US23A1574022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0561662cd3f2b24054f98f50f0bbdaa41f1612dfd1291e6853abadc88d40a7a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US23A1574026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab2ee5e5f0c6511adb3a93f61e5226a1e8e5599247834eb2fe75233fccb6e7d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US23A1574021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bf4c604b4148868e44da8f0f96fa5dc3cd3b537323d60b32f4df595003be97. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US23A1563038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffb8ed67951394edaa1ecd4c07c83a1500449eac96ec79263a01af1970530e0. 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/US23A1563041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba10d9571d5646f55b0945983fcbf7470c6e4fb4ca0f9d66d92388b703ee75b. 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/US23A1563043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c912a0441aaefdab255ed1c898bbfda57d3c6c1bcfdce61324c5122aea56077. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US23A1550947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae90859b90bb3489ca906c25f74bc481c1dcea9f53dbdbf36e1985fbd6d14207. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US23A1544854.