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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b617649c33e15b0fd13bfb644ff0a5049c7792643c8e4559cd71cee245e984. 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/a37c4fb5-eaa4-42ae-aa2d-e66ba8096a09.json and https://artists.proofprofile.net/proofs/artist/a37c4fb5-eaa4-42ae-aa2d-e66ba8096a09.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c94f31752981030cca60214f409696ca64e296cdce9bc600daa9c0332fac450. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZHN32299443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab00c79fbbe19ea22d0827b57ed9d39dbe45211d136cb842b0908aa3305709cd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:15:13Z), 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/QZHN32299444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafdbe2dd19711a838b3a2e5da8d92fa75a8185acb89cd43cd4c1ccc830059ce. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN32299446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe30f7471d673133ba538ee0c6aeef52d5563ab7dfd97342daeb278099592c52. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:09:00Z), 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/QZHN32299448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dc846d07912e694545cc61f0c173491c595610671af31167c2088af1847242. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN32299451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289d3dd39d0f95971991e1472d61b1d2a7bdb68f4ff3371f85ef4f81665b09e0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2404228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d97bbc318449c66a5746374bdd3b41b206e9732f8abfb402515f7939b21be01. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2404229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e92dbd8a4dee7b9d80a34acd4619f231f5364257c6749a448eaebdfc80a62db. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWS2404230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40e22f01d42c17afd5be4b4e626b2ae8aa827a2a84e3d4faf641b5ed6ed4f7f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2404231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774ef5199fa046c6d215b5c7c1f91b83bcc78366a5eb6434b8c39e28f52655a2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWS2404232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb152d060f006a98dcc38ceb4536f989bc76102dd58a81668cb862fd336f506. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2404233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40465253c4df016626f0e3280e9a8307545cd847ec0dba1b54c3142c0253ea73. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2404234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dad738f080f73abb256039fe9afef207cd68780697c4eb185183064d2ef6ed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2404235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1ced785f0da4df6e9c76f38f9d149011b12a6b797a63ab9eaf4c62207e1c5f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWS2404227.
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 0x4898ab9114c3df19346f1cb267b61002ca75ef4964152a0b3fedde299e7e5e78. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEN2512363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf022a9efc53bba8a4e7b3fa936e8f48d425ede85b8e663f8bb80e66cd69c7216. 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/QZMEN2512364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79f1325121ee7e2f680bd3f74c418981efcbd9b4d7833db197ae279238b1641. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEN2512367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cce4ef6c021c26ea4d12faea98437a7e327dfc4e974537f34df2a381a082c9. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZMEN2512368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01949582383084ecc57a50fe564a1479de69f81d1bf7277bedce9b9c7ce63ded. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEN2512369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b53b1cfdcf7a9e14660e9aaed31f62ee52d9a89cf3a8b70024d78bcb496daa. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:47:37Z), 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/QZMEN2512371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63522d6d1cd6394e816f16d534f9373d00dab2b8c81f356d79e4b7a05d10435b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEN2512372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed45feaee8167be44ac8656ce9048b034a6794dbb4ec46f9d2cc6b4d7a2bd431. 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/QZTAZ2559616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80825d31a2f37b0b918441b7d1f234800af2cd31fc2605f8807e97fe00845ce7. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAZ2559620.