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 0x96dfefd519fdce22ab78c8f0941a07e43bc0b3db3405fd8722b996272bc98a1e. 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/5b96159a-08b7-4583-b57a-ba5e9a7bee88.json and https://artists.proofprofile.net/proofs/artist/5b96159a-08b7-4583-b57a-ba5e9a7bee88.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 0x6576010b6a0fd8a5ed46276d0d131c679d148225604793e1d3c7a5546a6fbca0. 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/GBLV61819649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0f7145f02195251d270b71ad0bd8b2db609e6f78c601c2f543e8d87c80ef03. 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/GBKQU1959930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620c06ad018a769f8c468f794e4c4a87d16d7e70491939b54046db256330fb64. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US83Z2149449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f26edee4f5e653cf1edc11a5dc4cc43f6bb87b9eae8acee4d246bf19cd2e97b. 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/US83Z2149451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0279257d9787659c5f660f1dc583a44ffcd2eece57b2783b64c0dd522c236c. 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/US83Z2149452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f41b55b2c67e2c49b7426fd6874d550b549a61413c125de8d42686bf2a3f945. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US83Z2115653.
Nothing But... Afro House Selections, Vol. 29
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc8f5d4cf53dbadd6812d68bf8e13e324c1d6680fd5851ca7349568ed76499c. 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/GBKQU2335860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c047d23e34da70f38eaf81b3fee42dbf15a737a0e336e593e45cf664395a686. 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/GBKQU2043150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d7ad1bab507827a45dba47188003a4eccca45801ebbfeee099e277bcc9f81f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US83Z2513747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f99924f66713e7113b3a351036aa817b3d41c1719a5589d9ca726fc6c072e6. 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/BC7F22400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac5dea013239862eb00c08f5bbd7676a8ecfba97780e8c4a5089225c718b423. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USA2P2446611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250c751251b8dd01a499a5dd0f3d2ca858ebc44b1facf1447b1fd35467cd8dd3. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/US83Z2480892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f13cb496377491c88b82af10a77ccf0a541fcc944fbad8279fffc5b1be3393e. 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/US83Z2356238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584f2f5ab4faf8cf66dd4952e54aa4f89c26b8a797956b28a9b2ad834bcedd8d. 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/US83Z2337808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594e4babe26654f91b54a89e6602f8eef96776489b36674d24a557d16e75f50b. 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/US83Z2320864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dede8852ac51d6133d9879aa8eaaeadef8c92df8f7b9048004bc51681d22091. 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/US83Z2309052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea92ec1f643fd182715e109e3b923679fad0b2f21e0ae7a581856b922142a9a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITHZ02200384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5d21a71826bc2f5b982ab059ae916b7dd3d3689a4a11852e91fdc68702138e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITHZ02200373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db0655741c88aab36c1888dce8384bd94270313cc6752adf3a43ae814223fd9. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ITHZ02200374.
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 0x0a73d6b62e80133a8e564615d99f661f313f1eb9f358c2a2c6e52bda5a410d05. 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/ITHZ02000678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b71c835a0aebc815da2938fdfa5bcd4f26dc9a8106e5291babdde54294d60d8. 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/GBKQU2064893.