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 0xd8bb1aa569c0301324412911d0dbce991ac560d33531e4c44f2e358cf670be7c. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5c89550-e4d0-4147-a4e9-f87091ff3eb9.json and https://artists.proofprofile.net/proofs/artist/b5c89550-e4d0-4147-a4e9-f87091ff3eb9.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 0x7582c601fd660337a4da1a912e5bf88dfcf6b741646ba9be2a7eb1f8b89389c9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:21:05Z), 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/ESA012214874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b8625a5f6f66a7daf44e449ff08b2745ae44254cc43b84ca470e5c939c74e3. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:51:31Z), 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/ESA012214878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de2fbbd48eb79234e6877804a5fb3f073f6fde4922b0ad149dc656e9b829b9f. 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/ESA092310941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0923ec1efaf2d2f0258d476f0799484b1f53969dd4a2394ad2168691398a48e5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ESA092310943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d66e4e7412aa4600a2711e1ead9147baf22d51ba31c38c88fd550a7fd193152. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ESA092310944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2640765ea465d55bed670e4399bf76772496d727b72a8e4c9165385883c8eef3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ESA092310945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d69c9988fa4f4bb90e82ca3d1ee156fb93e5ea39aa8275aedcfeecc2cc5147. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ESA092310946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe437365acab04788e7d60d60b900c6f499357d28eaacb070d8763b33f7dabffb. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:18:49Z), 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/ESA092437302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd532dc64e3f85437281441030316cb632185304e5bc89bb222c27fbbbaaba34. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ESA092437303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9113887b170cc7c3120c90537e5d804845af3e298e9fa266ea6b94e916f8148d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ESA092510121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66fa1a7b45b84f0b4ab216abf7cc3cb3df22340dff4cad3bdd35f9c15763b31. 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/ESA092510122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8effd604d33f52bb7b581ce4c7cd70dc3e6425c3dbd94b9658de8d3b185219ef. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ESA092510123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6e41851dcae88e770fe9841b47a32a717b2c50c493508a81b51fb95ee36487. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ESA092510124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc200e28e10e57272d5b043dba910141f8864469029d566c8ce2101226050a98e. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:44:42Z), 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/ESA092510125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3f02af379163b17076225436171ebb6cebf925dda128551c52fb0969b95250. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:43:21Z), 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/ESA092510126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843fc4093a7ad35dfadbf9859d3ea5b58344ec39e50d60d3c5e8da312f307236. 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/ESA092510127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffa4f2b31008944eebbfcec9c1dc32775a7dbcb832e64cd93100df6592a9a2a. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:33:58Z), 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/ESA092510138.