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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccbb4ec0df4001819a31e1575479d4f44dbf9725bfc41b63d208cab043c2ef1. 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/6cf6c8b6-5bcc-48ef-bb86-bc1b1517580e.json and https://artists.proofprofile.net/proofs/artist/6cf6c8b6-5bcc-48ef-bb86-bc1b1517580e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3872d70e5678b2175d47038773c9e196ba8082a875df146daf4d8436ef9ad6b7. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QM4TX2218791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7862390fe2dad10dcc6aaaace7c05e0bb7f45850915541c299339658103dfdc. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/DGA052334475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9834aa089d96295864ebd064f6b28e21c6ba5645f5d6007abbe299e843cacc8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DGA052334477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac28c9f70d91f68aee20e5ffdf77e2df6fc89024f05e04a87c4a6292fcb6f87. 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/DGA052334479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc793da650f4f13de41efc2a1dae3e9d897ceccaf5095a01170cc1aad5ab4bb. 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/DGA052334480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66071ece87ed061f7a3ec1bc9bef5a3c20f562c7e32cae2afb3899df310b8dfc. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DGA052334481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47efbdcb74791c46b536eed2c9082f031daff01b5f6490f787767957fe4c5796. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DGA052334483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d05c55961d40d2aca4876f4e1a35a74574be88009ac935e40720405544258ae. 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/DGA052334488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe899e1f12ac62f1ed6373639619c59785b6f1615488f5840cb5523905f291948. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DGA052334493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0d9c8ebb69b900344f85dcdbdacf72594f4cad3840d67c8910933190b3c0ce. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/DGA052334495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51677958af7b382eb5bceb4fa9183a5f32178fbfdaa4c05f1228712dc7dc04c. 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/DGA052334502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9246272dcd162172568e060c27704ee88c949acc6941353dd798f2453d6678. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA052334506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f8332b4f8da43e9491d0117d2f23dcdd8de790eea6535e846c44c3f66295fc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA052334511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3040ee57246f4116235ee63c5585891421fc40cc2172257600d50dc9f45f4b51. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFME2324803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531103dc7c6f88906f4344b915459762447be4f7836ea59bd52c597460be924c. 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/FRX762401579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3345afca6d7103c41df2ad439dd80d574513a0e6caa9866d95c694cc829a23. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX762401577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd85f0d1367246fc04a294c1f8d072cc6d39e628e74934e0366aa1967b5e47a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRX762401581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba061dc30394f682834f7e4811b62ba47da7fbd48174ecbc18324c702d10832. 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/FRX452491826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3343a0c2e775ebab56e3a0ff08c5a6a1bc6c71c293770352a5e581e19d1275. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FRX762401578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d8252c9811d6296bfa027193f40884104fefe0bdf4c04555c812491fa84db6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX762401375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2744beca24b9e4a0a67e02f4287ebc027f29fd79055a272b5491a5b6f28eb921. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRX762402160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bdb0731d6a6b5e260971ae3eab5dc4853189922b2e8436e8c476a06ce5f4d9. 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/FRX202535483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7633ea5af408c42f2c4bb527e658cc138bd7949513c37eafbf39b1fdf75e7530. 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/FRX202535486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956ce89de4d8e15459354fc5818ae818f5b9857822a9921d902cfdca49e098c4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX202535478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5792bfe3eeb3b6456b1d910f0a54ca8ad61be31aebb0c1a7bca47974299b7fa5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FRX202539327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf17f719137bd7f61fee84958fd35ad16e145824df08ed03f4714dd483cd99e8. 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/FRX202535479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861ef57a4e5a05b3fc45c07dcd325fcf857113f046283fa93af176103629ee10. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FRX202535471.