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 0xc6ce6c95dc8c5b9fb038cedc7f9cffc78f3eac439ca4baf12cdd82e9b7485a77. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ed1ecc9-583f-462c-b7bd-4f6b9e639838.json and https://artists.proofprofile.net/proofs/artist/3ed1ecc9-583f-462c-b7bd-4f6b9e639838.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 0xbc8a2fcc7bb926e3617465ec21f4fcbd6d22afa3723388bb078fc2c2dc8855e0. 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/QZFZ22376998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fade9100693825ce9489e14aba90836bfb7b539aa37696a99e2cb8216a52485. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ22376999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd32c7f51d5088b73e27a8a91124b7bbedd38f66e76775f329fe69c27e7075d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZFZ22377001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf620fb1a0086394cbbeb505bd4de0b77337db6fb0dd282e43cdc417d6c20d16. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZFZ22377002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35cf6b678cbfddf3284143be8781197d0bb70f3a1484cc2b308cd6b8c4db720. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ22377003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c3d15452edde684193fcecbd2a2743c2242b14839bff3c6ac33cdee1f159d7. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFZ22377004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3936d5bd2817f419189a57cf5e8c4b1ce55b8eb7cafd9dc5a8da9ea5e4fcec8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFZ22377005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb638f0bf5bb8816c6fccb0be7859e9d80f265fcba37fbacc951c45b0a04c2751. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZDA82484440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfca7283aa3ff478106960826860b2493323cf53904484b367330704260a3cf. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZDA82484443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3b4a736daeb36b157a2da3d41839c65bf8ea213f27ff1c4f716f13e94b7ca1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA82484444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81b45d5d39fa525ea79ff4f10bbe0a75c2e23ed33495dbcdcd32c5d57b4cab7. 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/QZDA82484445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb7a6566ed7e2042d1cc1cb517885a7b7647b32571d5beb0924903cd3008c73. 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/QZDA82484447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea776cfb6c1c77460dde9f9af87643e4b46008e0729d7f21e214b8d5c5d92f2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA82484449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508dd2221f8ecf8b7a27ab1e6566d28bef73f438a5bbd1d078dc640362bab31a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA82484450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cd5f7f87c6a474a98191e790b5750fc456f4dff50199acd6a5e04a6623f5fa. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZK6J2576570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f5767d46d3e2f1093730eca8541ea665b8338d24ce1deeba3170e99a8117ce. 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/QZK6J2576571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf161771eb19976e0c0c4ea82caa0c985d8cce7dc2f435060181d59cbeb7c6a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZK6J2576572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedd29f6b67eccf2d38340cd691d7d5269c4c1ecacb039747f028102b8354bd9. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZK6J2576573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e458296a6c8fb9be9a42d63cca3091b83f4c0d3d2eb072d383b3ea6b3dfb167. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZK6J2576574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddf55479b3274e687396d8dae640721bbae3871e2fedf6c246a55753a11406b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZK6J2576575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08eeb29dac99142b2a77f0a5173c4901490c90e814cddbbb703cc1cbd76e7dd9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6J2576577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7943691334ec9c5c203f378ee61bffd06ffa7cce76d347ebb632f209d44cf5. 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/QZK6J2576579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9304b4a948a074116715c896d80e3c2a1e9f1cc42f60497d5db704519166b2d. 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/QZK6J2576580.