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 0xd21d5b75da28ad51cf42d3cf75447d8dd584ff1d4f15a3eeca344be6d9bf469e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/044f008f-8040-42ab-a8e9-12324b3d7f01.json and https://artists.proofprofile.net/proofs/artist/044f008f-8040-42ab-a8e9-12324b3d7f01.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 0xce9ca789b222784c482866ee2bcaf34e2e6fdaa3508b7ff15a3adc39e591cd36. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEZC62333797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28e064b943e3ca885b39ccb02b6f8b50006234701e1651e7e0bfd489a293aa1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEZC62194754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66648705973978fc26454e1f4d398632f144418761a27bb963c75d8e2dab2078. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEZC62194755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4589b69d850a18bee7270ea5167630320eadbf178a61151d35c2f7ce86dff164. 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/DEZC62194756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaf109c4b3e4fe24f5e2cb43770b0c956d228a1ec18ef934f71927908c37dc7. 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/DEZC62194757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9e64bafaad151781532ea708902d20d5b215dff91040b09a659ab38344ec67. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEZC62194758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f70b3624e33ee2c828c120f813f3e6b1902e62777fd32c56aac9d6921847c7. 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/DEZC62193227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5ae8c91f8718b529e07f2f4f993493683ad06f12f3ad2b73fa440dbae16981. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEZC62171743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0926815f68470e3a7c47b46d70040ae2c54bee3451bedfe960318ae56c953b. 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/DEZC62023681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8fe11848d7d98ba76d73534a8a7bcdc3c5373e61acb2de907524ee2201c955. 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/DEZC62023682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31bc55c64bdfdfb30d67e3a358c37a0709bcc61f5813b75f06ec27861b34dea. 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/DEZC62023683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d27ae8babb1863b27ac7229557ea4c36abab6e2dd71dbc3ac65525458a7a01. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEZC62023684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866fce485337f6c410641770aa72afb5147ebdf9b46d2640ea9fffff5f1a0b06. 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/DEZC62023685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db3555bd2607ed4d7bcc8bffc19d6b89db60770b91d721fb42d570b789f15c6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEZC62023686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8056281da594e0592d11fd57f45888e39c09e517cacbd009b5ea5b6552395c87. 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/CH7812231686.