thumb|A tetramorph cherub, in Eastern Orthodox iconography A cherub (; : cherubim; kərūḇ, pl. kərūḇīm) is one type of supernatural being in the Abrahamic religions. The numerous depictions of cherub
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 0x13749d06f6ff32df9bca22e0bf5179366b8f17439b61944f58d25c30f5a9e93a. 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/fc10f6f8-aa32-49ba-9758-62522bfebd83.json and https://artists.proofprofile.net/proofs/artist/fc10f6f8-aa32-49ba-9758-62522bfebd83.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 0x71a10625ee8f16ef16a3d62fcde571208b8df72bf65d5ccd402556a52bc46db6. 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/USSM11306037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaf610088d29a67b08e8146abfb176040c991c82bca71aab7bc2f2966fb8a37. 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/USA2P2127878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e9e9818a18baa671b79afbf43628c8efc05a4f8bf5b30b0e79f7b162f33485. 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/USQY51761107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaafbdea7132c66042acdbaf39b39488f8c57df2a1d4c33e2904192fd6ba981a. 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/USA2P1690269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaf610088d29a67b08e8146abfb176040c991c82bca71aab7bc2f2966fb8a37. 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/USA2P2127878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5958e544410d387230752638e7bb309efd7e954748c69b421abd5e9b7a25a97. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USA2P1679639.
Wide Open (feat. Cherub) - autolaser Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cdb41043a8d9938723f890a1c9a46e1978ba93aeb63c6714dabb501e1cabf8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USQY51767139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5958e544410d387230752638e7bb309efd7e954748c69b421abd5e9b7a25a97. 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/USA2P1679639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde62714ea7cf59e31ffa1b339f8f7ca3a8abf1d519636343a5ae1aa8baa59a89. 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/TCABT1459331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdb9116922f21b56793737d41b9049daad9b10e84ea0d05e825828835588888. 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/USQY51737205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4e2da8f06b7b9365a7c7a4dc516043928e20510747506b214ce5f2daf0d056. 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/FRX762371868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5ec409651aa83a0c6318cb5abbce9ffde3c932a694a9b582651b9b7cb7066c. 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/USA2P1383964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4433eaa44bdc0b417b9e36c774dbe6bb624175bab83b182defee8a65158c80e7. 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/DGA062387072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4196e9ff78798b0553e51401d401118073b5154d4dbb2e2cb85a736b1da94e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DGA062387073.