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 0x97821bcf68769143bcde17f0758b7bacff5beb8f3749e49b357c1fee783ddb55. 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/c33de409-610a-48be-b8be-3ce3b5fb9ade.json and https://artists.proofprofile.net/proofs/artist/c33de409-610a-48be-b8be-3ce3b5fb9ade.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 0xdbdcb0378f6e009acead5b85d2df768b691779c53aaf1fc22413565f4002802c. 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/QZDA82146229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b407e7d6a66f33b926517231f9a87a8fdff284ed67b42258706268c32892dc. 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/QZDA82146230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e021f101dc23f0bd23d00597e8fa0e6c62ee6caaa0e5a22a6b9bfeca23a8e9. 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/QZDA82146231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23d677cf785947df18711738fc9b3074723ed3ade60c05bb1511556918c72fc. 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/QZDA82146232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991e70923c0296022bc22c3c5fdea447728d1b94036d08ae561ac60b54c14161. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZDA82146233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069a8c7d1b4c676b49aa59b6fe6ba767cf8cc7ebc8b1e91e6ae80f6272cc01fd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZK6N2117951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371f1eec74d332a3fccf5a7d826122a4b9f28a56e6675f661017bf00ed15652a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZNWT2147417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966a10581a9811e40c7f26ec1c0ecf156f93d856fad2228e6f0927ec79d4095d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFYY2330614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c32191795c02a2fb92da5220c3854ad207b3f895aa4aec8cdd00d54fdf16a7. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAHK2377678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766b1e0e375392840d7735f6e5754ed4e842b87ab2353db465dc1aa48869eb2b. 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/TCAHK2380966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf50c048e585c11c80f1a133d7fe6485047bf108b431abcfab7264f49fb635c. 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/TCAHK2377781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2097f5bff70f9f2ccce37851bfe5257b0b5dbee09a2369a0bc1cf28dcdb00bd3. 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/TCAHK2377805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb096c1f71a573b90d52081c0a0f370b8eb4d34b02068e5a807ca24d0f67b9e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHK2377818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11b03aa4c815c5dc58961c79b4b43ff9390eefc06b95361ba3f4dad523009f7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHK2387840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2a1d6954c262ed32ca545991e03808dc58eba1499a26038131071bc52beb47. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/TCAHK2377851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0721a0a4af1dfa32511611a530e81da1ea2796cef3d10d3a1601b458ea099938. 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/TCAHS2336713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49159cd84fabbaa0c123a23f99c1b6aa6125e48bf2a2c623460d8570a485961. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAHT2477088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d087f4858f49f0f86454bc09b2ab97a02a9fef2ffde3e63d932a8992400d5f. 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/TCAHX2491433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e963de4b1c694871d412ccce765396c67d5dfd68147a4eeafd41a8034e9024d. 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/TCAIL2461050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7999a1f4f0f0e75b79370fe85b175135bb150321bec9d0a46dfd05bf0ed976e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAIT2408166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67035186fcbbb44c5bca56688f4e89c6dd81f8bb04e18fcad8dff36fe844803f. 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/TCAJB2408725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded10c378e1bef99dc97b155bdb41b10f2de1a1e439b4325422f2618a67a0645. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAJE2552485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be1107bf8acbd8038b362ea47bda07e64784cc0a7b2a95d24e30937bb12d595. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/TCAJI2533020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e7c14862876bf21ac76ea42e32d947978647c545d52c104a713275865ef6e2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAJO2575788.