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 0x2bdef2628917e0403fd149f8ce003ccff906befdb6918c2c5556571edd9953df. 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/fb05e534-8299-45e5-a572-b23973f460f6.json and https://artists.proofprofile.net/proofs/artist/fb05e534-8299-45e5-a572-b23973f460f6.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 0xecd8acd33435ad0c1e3d951036cdbf793c65738286f16f375f1283a0467dd76f. 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/QZL382064959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4661522a6d1a6979365b937d8650a77aa16beaa7d7684c2306ad87074372db1b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZL382064960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36758851b6361b9e6bde5d1827339d3f984168cb5a68426e3a82eb17fd28bdd2. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZL382064962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c775d121067f7a500017ef41e2c260046775b16763536ae79ed79fdfd3be97. 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/QZL382064963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719db94f57b249facc121c555417ad3715f693b98d7ab7fcfbf2d20614a9459a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZL382064964.
Казки з Задзеркалля (за участі Лесі Рой)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae9e81cd7d3dc826be4f1c7d52a7f0ccd6f3b1894cf212d2fc18c3faf12621c. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZL382042904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e2ab916eecce31372f52fb63181ff124d8670b2e4c74633cb44c6acbbfb1fd. 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/QZL382042906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9eedcbfa457f781ddc838f895dd9f2ee46409ce2fa087f1dad9a3f845a7fa1. 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/QZL382042908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947cea2a3d5f9d2c71f97f2a05d12b5f13725d2c5adabea8d6fef6c1a816f534. 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/QZL382042909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6321af938cbaa3c4f06f6520ed38e1d5264439bedb92bff1288c9bee6b7799. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/QZL382042911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa4b713dcd92196e80604d5eb8606deb1de8992d46414ef6882ea0e77cdf4b8. 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/QZL382042912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c933e188c22e5bba1081afe48faf85cae32b7f90d948d051779fd39b6f7583. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZL382042915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8fefe5f8d170a5300b6987fcfd74a06e9922d36af632f6d9d33d8060146a32. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZL382060245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad48a17ab762e84e90b0c2a97691d801c7dd4359fd30096c14e12ba3eabe610d. 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/QZL382060249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fef04bc6feee996d8607401cefd0c74f4823e550c0911061504d2159780bd4f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZL382060250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb12bcce38449573dae5590ed58e9422f5f449ddab14460e39d80e9fc78fae69. 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/QZL382060251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad24bee605b97dc29d24e210311c1044677ab5dd2a53c2a52fba0c5428cb950d. 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/QZL382060254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5678159134d05495aebbfeef9143559bbbaa519f56c3cfb4d5d57e39cb6848fd. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZMWW2219968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56f8bcf777bc2b64b3ca423803ee709246a41afc54af74d50e49d6e23f52a44. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNMW2224524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfeb910d2a2bf129c88891721114438e5d85a8ad50251b3ba4e6f8d43c1ab17. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/QZMEV2343715.