thumb|upright|4th-century Sasanian stamp-seal of a certain Vakhtang. The Middle Persian (Pahlavi) inscription reads Wl[t]'nky Vakhtang () is a masculine Georgian given name of Persian origin. Original
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 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 0xa5b6b9e38c22c2ec67d488c1201f3cda5338efee0bf8eb35233159d144038109. 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/0f625905-650b-475b-b103-facf170fb837.json and https://artists.proofprofile.net/proofs/artist/0f625905-650b-475b-b103-facf170fb837.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 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 0x74d41deb0fc1dfecea4194253032af3c2b0de9bbd65462206393de9f15eaafc3. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/NLV5Q1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd8b0615785ac428155bc7ed3187a04279c62fe08328552c947c9405ea4cbad. 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/NLV5Q1800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e7651b4d1931e1386bf2aaaa93a7cafc3191893588adec9023664ee82f084b. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/NLV5Q1800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea65d18d3d340e616d5f8021e5ac1eee7d31c70283cffca8767d6398d8771d73. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USCGH1902988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d6f7e776057733b5e16abbb7ae75073e6547b41d3775d370c3b1fb38da6485. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZHN32007059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2240ee3eb8ec571b51dbe1bd1889513998df82e664d81da2fcc557fc4696231. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/NLV5Q1900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a9e1102a901da715418863e162163537882af3d097ce66b12a6af499bb39b9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZMER2127274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ade06c5dabc591df213eabf6e415b026787b4bf93690c587f3b366f04a2e3f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN82040113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823f09be06e6e90845847397bee7918fe5a18a3960dbb64e8210c84c4b8ca9d8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZFYX2235028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee70e0ae7e02593b5c61bc2880431e052a8e7990b4c1436ef12b7b4fc8cf9088. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZMEQ2191576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7446144de2a412e6a8904d2383d847485ee8a7a580cc20639b56b125f3641a12. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/NLV5Q2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590a7e103958bf7474884f13d1f5fab69703d763947dca1b551defb4dae9e414. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHNC2271128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc506bc0fbb3b39487d45a38d7a77159e90d9f61e0e455c83146556225784872e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZRP42204948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7220f8fd9f73a932b842c213cabbe04b7567b72bd4bee0bec0a3d345cc7fa1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLV5Q2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1474819f848624d078ff45f001d5f70635ed70d4f82891adb7fd1fbb10060768. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/NLV5Q2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6213bfecd40b2ccf234324238efced85c47e7f65210278b0765fe24a09a77ea. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72418860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bbdac443b4f49e2bde4539ba19dc82fb3c474aa948afe0f0b79d47b2bed982. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZES72418862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc95cb9bb1bf807f590331867b9d13932396b336e993525244b7b132df753a06. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZES72418872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e64a738456b632f14311933505a97abc50ebc7cbb36fc01c6b7760914b8233. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72418875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca95fbeeadee5942e087c810e4b69314c06410d803cadf022c021fc7b9e4bc1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZMER2421125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfc5acf18dd35351029629752b007698cd3c98a4dfb707a389ba10c62d7386c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:32Z), 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/QZES52576647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7d7742d5f84ef68b20428fa50eb5549f9f2c82e27ec46e78cd9f6e38ce2254. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLV5Q2500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad1eff53526b7c4bccd0260dc3fc9ed2a980cb6c3ba2bdc1c74fd1b944923b7. 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/NLV5Q1800005.