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 0x889be06c583e715aae9eca0944a8983d478cc6ce93ac49f03cb0c6f45b0a1f4c. 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/85848e61-de81-423d-8982-28d104c0813b.json and https://artists.proofprofile.net/proofs/artist/85848e61-de81-423d-8982-28d104c0813b.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 0x7c3739682c5ef00fd3d7412a595bacefa3106e198c8933358e9399b8aa47e403. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZRP42181615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ca38bfed5c911df0e518635e50e7ce5389421ecdc7dc7377937645e4416309. 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/QZES92229811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fdbdbf6450d35fb2469c4388ab56e796760591fe44d7c650c8a8a72090b1fb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES92229820.
Slovak Band, Radko fast (Odkazce maceri)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24ccc68f581583330614f580deca54f2262c6b6d30f1e2a5f743dbcd570c6a2. 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/QZES92229825.
Gipsy Ferko Slovenská Ves - Keď mi Cigan zahrá
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0c782dda3e1bbf78fb6eab972d8b70775f1ed8fdeccb0a73b77a93d311fc4c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES92229808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7736d69264359306848ca24151797d8ff03080281eaefebefc203619dd8fc3b3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZHN42290821.
Gipsy Culy Gent Varhanovce (Phen tu mange)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d828372f554b1fa7374c10a77aa180e75f503efe0e914701aa8d63dcd33517. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZTB42202889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3b9e1fbb1b505601551d1f5b9833593469e34a16cb71b8f542ca82f1937cb4. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZES92364552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2acf3209e4795b366a888e1aa6ab7cd13392ebea7bccb281bed9a6916bdd92. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES92364550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ae8730c750c1eed32bc958fd846a7312002f2948deeda9103ed451cb72c04b. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZHN32322802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1ca1de0b951dbb0b843d4f26230c266569db56ea9ffc64d67cdd7c731cdba9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN82331482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f878d237701130a13e68826f4c7161262fd86ec19330ef66090e7ad7a06b7e. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZK6Q2388239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc5840212979a204995b96e1006afca19e1d2d0a90d95e2a8516d12540c6cd7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZTAY2356330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f34f8c958de25c11ed81ec84edecb806e53feb5a71e8e117cee86abe0c80461. 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/QZFYX2460967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62623d82711aae65e9ea82b13c0192e8bf52c830af459359b2c7e180e7f0135. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZFYY2412813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce97f5e4c55412586bb920bca87327ed015b26cd20c69a6fb004c95f778e179f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZES92447483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dc20fb2c18b613a110f9117ce218ee8cbc5326af8929ba1a2e46b3edb57a0d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZHNA2451529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e07d6b178f86eec6a9537549f1060e1b8805ad5d6dfb6b257b8fbad9f86dd3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7Q2498904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6199655c27507f9191022db5d1915146b10d484cc88bff5877286a6b240156ac. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZFZ32568311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d4b0bdfc7c9812ab37afa2b61dc107a5913aa2e44f76de1248146023d25033. 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/QZFZ62514899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b41b5825da6c11497d9a45e27abc069f434fd5f4f8d29a503c6e9e719e7143. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN82528616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc2ce1aaec39e90ad4f0045c4ec79eb49152c41d49cf8f8d30da556f8a9b6ec. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHN82530265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caf035c2f11dc374337304628efb72703b81a1fa63c75f4652e249889a76c47. 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/QZHN72551622.