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 0x9a0aa71b202cbdca029a83613046907177df8cb203a5b076227ac8b1dda34603. 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/38a6037d-d2f9-485e-809f-ae11e3bbd9c2.json and https://artists.proofprofile.net/proofs/artist/38a6037d-d2f9-485e-809f-ae11e3bbd9c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Традиционная музыка и горловое пение Тувы: Кызыл-Москва, Vol. 1
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 0xc581ad6aaa561a01d005be0971a3cddc31a78b2f1a4d54f32fb8104d2a171740. 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/RUB411700725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4434a52817b7aa49ac54d0c018157ef8c9a5ea5435908e970ba587a76d1fa0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUB411700730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2694de77c768ee9cc407f050d280e13d3dc698d1ae6d7e3e619bf3382275f32d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USHM80853478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39924c2cc714c27f488ef2b9b3b8653acd59af68ac10a23ced4138127f9b59c. 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/USHM80853481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75c4ef7f36568d8060b0bdf76d15836c6c13b6977ef6e3a9225e461b4ba2577. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USHM80853482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1fa52ba7bb59141ee076d5b40a805a535adfb92d8e11a44af0b756c94e6dca. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM80853484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a60884b79c750d971aa06bcefde0d5ce8ad3c728c82abdbbacc900c86c555f8. 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/USHM80853486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b67315555768209abcf72706a7ceffb1e25f256eb59aef73c06b3d1dee5185. 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/QMWMX1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43628a7908a650b2d1684e7edc7cbca5daaa592cfba181c57e25b96f28083694. 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/QMWMX1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab25ff22b73a4a0f69044560b953b072e5c75bbd76ed526b271b5dbaa0f1d1a5. 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/QMWMX1100004.
Odarladyp Semirtiili (Let's Fatten the Livestock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6832aae2a3e8b14e43b44e76c5ca6b01a7dba447818aefd7780d68a5a3120390. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USSF11757802.
Dongup Xonar Boldum-Na Be (Don't Let Me Freeze)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc04464eec06b3cc159c0bf3863854a11e1cc8156e03ce841d2940889006252. 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/USSF11757803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd5096e51f3c4b341d46999ac52fceba4e9f5c7655849d1482b2202402a5b5b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USSF11757805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7a636f45c046a16b2ca56db48679e1b0e2e9812c7d6b23deec6913c1af8e51. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USSF11757807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed8a8f00f6279d72c6d023ecf6502ddbb9ef355d56b86b26a7bce0121a9bc34. 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/USSF11757808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1237990e77b7fe6ebf236e71062bd1081e200c97c6bce490b83a55d3686db3. 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/USSF11757809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bae0e76080a7969639d5103592d23d23c1e12c70f8967a9576441a787d23fc3. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/USSF11757811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adf751749baf1e594f3fc3e912d15373df03a60367643c3da3f1f7edf0cbd7d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USSF11757812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8504ed1cd1a85b4cb2d9401cce1d6edbdfd1238d525dc6dd46455fab4d27884. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USL4Q2030599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76db8d8d238db049fc7281583b03a84e3570af59bff75f24f4969da762a745bd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DES562210418.