Polus (Greek: Πῶλος, "colt"; fl. c. 5th century BCE) was an ancient Greek philosophical figure best remembered for his depiction in the writing of Plato. He was a pupil of the famous orator Gorgias, a
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 0x569515c23aa988332c31bca871e61753cc28763754e294aef76731eba532a007. 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/9441b53b-bf1b-4161-8dec-71184fec96b5.json and https://artists.proofprofile.net/proofs/artist/9441b53b-bf1b-4161-8dec-71184fec96b5.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 0x2447c76dd06c8038bc294b9bf143f2543f84f6cba6ba326ce7ec74bd86689bb8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:27:21Z), 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/QZW9L2233755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0123f7ecd409e3cc498d03e28c1d872d5519c2d7bfb6a97c6df4aa9678fcff72. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:46:35Z), 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/QZW9L2233756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b70dd0a282e36a21133073c300a97c701bb5e2cb6deab88adf4c1a109f76a7e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZW9L2233759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c59c2e8499bd7aa82297a818ea10510aaf2d50479c0504984a8112da780f7f1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZW9M2228933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea7a999ce8ec666c1a1c031df44dde870a02a4abc3acd222d5647d3f8d62c99. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:34:35Z), 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/QZNJX2498196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9630b75aa783f8a0e2fc7cca35d8b0be01c2239f954cca39aa6d161b9519c52a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:53Z), 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/QZTVM2436034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30550a2c7feeac1290daae15234dc665b4d65329dc10a49c461288358f60836b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTVM2436035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fe34df2f13360349e0f7f97f83433a3da2f6b706f3589721a33e2fde1eb038. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTVM2436036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caf187e3fbdd865c058deebd4be4ddfcc97075e5802ceaf5a98112e428dc40f. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTVM2436037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd822bfacf7c8ed201a92a591b298e14c378f258955fab2d25fcc6750bfbe6f41. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:25:41Z), 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/QZTVM2436038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762883e509ca954da76c52763058b47b8e8cccd9e81d56c94d5da16acc8b30c3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTVM2436039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8656475e13d3321bdf15a74bf5d2363a1ae9485e7dc99dd77d1656dab36143. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTVM2436040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc6ef5594970d32a3df98ea7e1bf7824b3778783f6e5babdc335e12343cf54a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:57Z), 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/QZTVM2436041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ba639c65ff24a1f574b7cac0c56424735c7c6cf475e6bc995b084fa7b9a290. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTVM2436042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845b18494b863f02ab0647149d9ac082d6edad7063cb407eddc764c8f94ae287. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTVM2436043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e2c7af60184e03e503083833c2fdfeecd5076268c73e69333ab195c76cfcc2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTVM2436044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a07955cd4f3ace123e196b7e68534b689b16374799787648075f23ea467c99. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZTVM2436046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b15001ccddb74b66d4ea84773179ac5544d8e0abdbaf96db3124e542717dae. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZGLM2599173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d76beb8432639a703d40a3a15ef957109f68be66aa322a4604e99d87195a3e9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZGLS2578617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4c726fca4a974310a678b8d7a176f0744eda779d3642f7d764a163c11e46e7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJW2572539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ca97dcdd885b62ce9050f1f21bb1e85169684053c29e96a7c25a671a941ade. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJW2572538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf67b3470e35b1cb7974b085a99af4a4db41023f0c018f13c51496e064370a7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJZ2524538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2505040ecc276d563398698ccab262452b2aecdfb3b3f759fd1ab0f7b2e94b. 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/UYB282411505.