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 0xac7ecda2a5ce42933df30abd582412236db59ead710102924c2bd1376e966d07. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecd4db45-b6c8-4942-861f-12f0c16b9c2f.json and https://artists.proofprofile.net/proofs/artist/ecd4db45-b6c8-4942-861f-12f0c16b9c2f.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 0x86ee3ab0a1e3157165dd08d77f2167308b3a5a5ff0d3c05b75a84450123ec5ce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB22218828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d51a1cd1da4df86dd95f943ddefbafb64f13ca64dd424e619423401e817905. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZTB22218829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b17bf6aed4dd5b0b1b0bb2d6e0a37a7455ffe630b0b2471799470874886e2c5. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZTB22218830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfa6f468a0d189f48231a9a6bf124fa4f9b7c6df2a3e9768b59e0b565389717. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTB22218831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71122bcddc1a9bfa3acb41df6309772ea56ea9387feb6ad2d99541e7648e16b. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZTB22218832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e102820315d8d295dc9cbfe038d7628f45aa59f5d67da2119ad8b8530f0ed15. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB22218833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556b278d78ea164fb4cdb73a12ab44173bedd01ffbb389e95ac0859cc01c919e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZTB22218834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ce458b78ef3879a45901094d84ca7ce04245848c9ae1144d3439107af1a221. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZTB22218835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e70acb70fe12043f5ea61a3ca7b71fb8645c389b23bc6082d63b1262ba8c41c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZTB22218836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bd8694588a2895b0b33e079193b4d99f5e4893b828594af59b25d95699bc35. 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/QZTB22218837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e4ed0be410414eca9938f11a2826b07a9adb1854af48c9debe153efbd97b51. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB22218839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c89e49978f6cf3d949894b5fb34f6989bc2a02e4c09f44bb3ad1e924c244bab. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTB22218840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf384ec42638836f901fb58749cf4464b87d4a01e0f04a69b77c0783eb30d65eb. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QZTB22218841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa066e7ce309222b05bf429e81a9cf2447e27a746d9dba7587e68536e2aba4a5. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZTB22218842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7f4ce24f4897094002a0111e2cf582dbac4e0e89a02dada4430dd5489d0f3e. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZTB22218843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29eedf20a834ad5915de5f0015c9a43bb35c4806b3475078c91bbb5c6bda1cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB22218844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18adcb19aefae4c38b87ee2e9f22d87c9c732f0785467c5a225cec830cdf613. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZTB22218845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4186a098cee4e9e620317f19b017dbbfe18065d0c8fd16a512b685edacd4bf4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTB22218846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4967c2bb4dc28c506c95ff1d8a2081313cf0248c8360c18342574eaebe4329e3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB22218847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a1297f8297dff6266fe994b92871cb7cdda510a7e86699cd347eac3d882af2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTB22218848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0404534f931a4258301818e1a12b3b863707a7bdc6daf87b379cc61aa028f1d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB22218849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd7037f356631e2c0bb588c531df1a0f4c61b238ae93dd67ac3fdad2fc50101. 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/QZTB22218850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1136318a349507b5a192cefcc3086c94b9cc0c3c8778a7817bbdd9ff53d75446. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB22218851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd831cf6a135ab3043c07692858eff5c487c56fdf16249b37c91848888985f27a. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZTB22218852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952828ce194ed30d04c804d5f0f4aa8d208ee381bdcd75f8899202240010b37d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTB22218853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb325e0debf7382eadf418dab034bd1637228901b8c2993482596c16993134a5b. 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/QZTB22218854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ade152422604f073fafc038b64f18ba71f44b08cf4c62f44644d6962828c6a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB22218855.