thumb|200px|right|Dervish with a lion and a tiger, Mughal painting, thumb|200px|right|Ottoman Dervish portrayed by Amedeo Preziosi, , Muzeul Naţional de Artă al României A dervish, darvesh, or darwī
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 0x8d23594d75fd984aeb62a5dcd7e02b6e8895bc98f097902c57c88a3e4bbb59b4. 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/d2f39ad1-052b-4dc8-8891-6e09370b07d6.json and https://artists.proofprofile.net/proofs/artist/d2f39ad1-052b-4dc8-8891-6e09370b07d6.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 0xcb61329ea04a56c182fe8466cbf1e962d45314ce61d255e3da31c830f5172363. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBAJE6400568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194b4701fbfcb2cefe11df09c22df43f39d9f0d70ce715f85dc4e7d97e664a09. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USRO21901528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887e060cdfea202c76f4b87c8b7abfb128997b6e9086bc07cb38a3855c7e07ed. 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/USRO21901529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641493ae27b408942fff47987ab6c362b77c9a71cfcf77b5e07c60be0a1ca085. 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/USRO21901530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578780b6319b6151e8609b7cc8c7687ff3763bd04e549575e14ea7e1139b7baa. 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/USRO21901532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e8ad7b6fd951d2ecac019a2895ca04ab16494fd17f42e7000c9697c9a0002d. 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/USRO21901533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e966b7d9b19a91e025d795b9305809a9795ee2c95bf8408786265c3d56c721. 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/USRO21901537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4703128b2afd9865a8e9a679b9c28d2d15c52e464cb16e9853dbc7d0ab884ac8. 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/USRO21901538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90acfd2359b247160012235b076f1cf23b255bede7d6a319232ba5f5ce8691e. 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/IEBGX1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c52fdbfb532ca070b035177855981c66c453186c5bf3b7aa50a5271f8c8ef2. 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/IEBGX0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda99325fb1740382985cad7f6098fcd506560359bb35e45f80d19b5fd5de7e4. 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/IEBGX0700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74c1e685c521efdb41090fc23c9f2bfdbd2a456d60cd0dfbf86ef6c7be6688b. 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/IEBGX0300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1714def13dfc342345b015fc8b45c77edf23aa6bad0976d20b90070356bedc. 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/IEBGX9900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89e4d92f7f3802bf4523fde300be5e33167f51128625ac3a8cf6194a82442ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IEBGX9900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef98a052779945c6476bf9ae798c9a8487fddc99164a197ad0b3f5e3db3d5e9b. 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/IEBGX9600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab93287b968c6c3b4783d6a594cba850a8e750601f58cf333e6409c56710e54. 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/IEBGX9500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd152325c4dba791f7e0e74947145c8b62eed2d94f8ff48108b2da77295ea19bc. 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/IEBGX9500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1ae07ba822a0e201cf2cca2e30b7ad95e504091ec48a1c106983b254c0e51c. 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/IEBGX9200001.
The Mark Radcliffe Folk Sessions: Dervish (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf107427a59e6783970d58b3ad8b0b6e0a2b99ca7757b7897440c1ff673ff33a2. 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/GBLPF6691908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03c33f8f23783d032195c0c8348e5d9be4e95c79eef98ef622e207e80619521. 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/QZR8K2563000.