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 0x39b4c622362997e4adac6ac43d84b31bf18994358a735c2c9aed30d78f497371. 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/8131895e-a5c2-4db9-81a6-1f023afbd404.json and https://artists.proofprofile.net/proofs/artist/8131895e-a5c2-4db9-81a6-1f023afbd404.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 0xa4badd9473d80c8116ad9f0f62ba18d8bcab13dd9c4faaf33c8a743f160e7fc7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZ6BY1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04b163848de62bced9e0ee060cea90bf0dd6c007cb8144a8ae3422dff1df7f2. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QZ6BY1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f8df08cdc105a2952cc9cffff6fc052892e33af7c7c7ce7edb5a211bdeae8e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZ6BY1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bb9f66a5f200dcf9875ba4a4918f76a77b06126208afcbe5c8b803fb768a58. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZ6BY1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4d681611f2645e111c3befbc4e852b9a02cf8e3e0047cd1abf5190a7e0db30. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GBKPL1800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665dec559bb602006fae6e5114b00acb7647f7a792670d119c5483328590dbbb. 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/QZ6BY1800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288e3cc5bf06b50e93f024c03ed88e2de1e62de2113b10ef8e87d86644e979e5. 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/QZ6BY1900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3651eacfebce44f6f5efd0fdf68b9476ef7feb31e5620643d42873dc2970dc. 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/QZ6BY1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a7f532a2b5bff2f0e620c1cbff7140a79132ef4b55a922c9665ffd9b76c341. 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/QZ6BY1900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a479e7087c8cb51112842d6dd59552ad8876bd6c325e9cbb129ae703802882. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAGE2254739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163031d718ad3e380a2bb6d4b704731f7114ec8b28e20fdd61b434e93e9c71a7. 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/TCAIN2439377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36c32405c3aa5b881dd10b6d7e39015e9b2aff4e02cc3688abdf0fe452d2205. 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/TCAIJ2432632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970515e2522ea2487da35453cb49c358e39bd09b5f6cb7bd94934a2eca997433. 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/TCAIU2472037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29f6d7d931b78d82358312129df57e7d273552d6ae81bcd83bda591db04bbb9. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:21:32Z), 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/TCAIS2462011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787bc0c212ab96a33c74964a61adf03c8cc4dbe607ce54025e56a719151a1160. 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/TCAIU2472223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0629ed3d227bdb3d90fd102503070de2f939cbd78aa10980cd9ddbf6b046a6e1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:42:48Z), 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/TCAJJ2552787.