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 0xc187bf082dba85feb8745b8645da185599c1f8ab6c895516b13ff82fd9f18e4f. 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/a265b191-e644-49c4-bff9-0962299d162f.json and https://artists.proofprofile.net/proofs/artist/a265b191-e644-49c4-bff9-0962299d162f.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 0x03bb87f9b312e4dbab9e989916cb8b22eec4a244a3a60f286d5bc1d9f28ab669. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEBL61332297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758f9ad4e1409adb0b61f88f782394b9889e79211f4209e28093a6351747b083. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEBL61332300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2269f23f9feda9ffe2e3617a15270ac923f8b385a931bbfeff325f536c649b4a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEBL61332308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd8cb05cf15fd58ace8dc38556210e35fdea002fa34974976c727819956e8ea. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEBL61332309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fbd9c2336ada6cf06ad0e514f14ec058f8d33cf3a04f4ae0a00818affbaa01. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEBL61332310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3176774897b07c80dfd86d638432ff6711e94d79c4924a5bbe162a1a6c6a87. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEBL61332312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7d14022b6abd8d7e791203515e7f75739235be71cdc029d6740f306c589c26. 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/DEBL61332314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574531adb32e9574755fc3f31a669e3658f29c8828edf420d61bb73874e25992. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:24:36Z), 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/FR2X41507753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9535527416032c8997c581c2810d2f157a3823d11d83a6070d646b9f186dcb1c. 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/DELJ81512182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fc3f226d910f44117da42e8cc08fbd6d0dbca98ada66a55dd0286180b313af. 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/DELJ81512189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f93d767fc58dd5341aad59252a19c8fa5fcfe22f637c9b81158a8622dc51f04. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DELJ81512191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1e32ce48c12db718cd68bb90bc3900410090c060f2d8960440c9ebfa0aa431. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DELJ81512193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd354699727ccf6e1497c55de8684187becc811af2d16bf92a707c8156dd50e21. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DELJ81512180.
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 0x87a2a8bbe9507423d2dc5e6ebe0cce989cd23f0b5fc85e1a34845a2378f3cd89. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/DELJ81512181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679c9d000c87474c007a9f7db326df20565c0af985256617237440d2de17482b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DELJ81512184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e91e35be820b4f0d3ba9054d392445854ada88f6570d608044268eece9832fa. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DELJ81512185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05d6a36ecb2e44911d67c249fb058ed71e685f14fb27abf88e46155ddf6cb1a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DELJ81512186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148d8265b65c12e137c372b3ae129cd69833d6bfedac35d3d249fc387e45aabb. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DELJ81512187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1072747eb46e3a89d15867b1a125b685b4e89a8c3d47a22335a1647e722aad28. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DELJ81512188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77faddd93a5b50d9f0c1e7bccbd6d2b9af7fe9d226e1e5dc5fc98f0a5fd12d98. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DELJ81512190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d718a0753972bfd8a720f52f64acadebe6b28b02d4c9bcb65a25f7c27d20a0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DELJ81512192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a6d47192e5b10d915af825c34b5a432f7cfcd505e98a453dbf7bf506661139. 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/DEZC62111019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6476810785ea6479f8fa1edc5386b26bda1b76cc99ca84b28739205df6e05620. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEVY82000095.