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 0x2f81c2f3c35d668f2604fe732a522d153db20c3e59e87e9a16e1299c40f3bae3. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1a4d534-b113-4c5e-a1f1-7ed8302593ce.json and https://artists.proofprofile.net/proofs/artist/b1a4d534-b113-4c5e-a1f1-7ed8302593ce.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 0x7bf1294a0e1f592a83038a77e827659762e2ab95343af24a1199ebb5a62c4603. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GXBDT2348480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2b751c0b72d50f26f83c1a687fe83604d5308020ebad3aa87899bb3d24ad0f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GXBDT2348040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c293acc4178f7df0a1245209e7b7a13223fc2b7e1da5b1625dcd9517acba5b7. 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/GXBDT2374313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a216b3214346e46735ba3a38a771143292697f59155d169b17b21dbe8ecad1e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GXBDT2351701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78326b06cb6ce626ed087263d0f9c96b26282fb6da8e9fcf44397f3ff7e2dda6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GXBDT2334991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7d59954273fcfe310ae764c5baa8e2e29f6678ad052ae6b261061c831ac997. 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/GXBDT2356387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bdc6cfe34f8305056645be3ac6d1a2b780e8276b202587a041c07e58389b46. 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/QZMHM2335203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20586ab9372ca3dbe3f5a766556bec64c4389158c0ae7dd28f0b71ee09f12179. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZMHM2307567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6e5b3c7656889fb08850fa99a5f1d3d869bb436dcf610901e2a46d65fa9c7e. 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/QM42K2344356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50847b7e33fc5f9ecd6b4c29bee27a89790f4268f99d8351c0aa684aec93a5cb. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QM42K2359466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5061f95756aa338a2081d9a8bf4c52d14f8a8e5010f7eec22111b894d6a9f9a. 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/QM42K2007238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d524dc4d316ab86c3bcc715e1afa9a819c023a68d6181f30af04327486414d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM42K2061552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29090fbbf4dff35b23d86a76ce85501dcbc85343e68bed9d7820555ad343f0d. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QM42K2069011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d012a694ffcb103daacecc860c5938ac054062e9ef41e493b0884bdb535359c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM42K2088505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62881d5a52b807f41502c9fcabad2dfcecc806e27098f9f241f14b6bf775f75e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM42K2007574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124a59343deedd59279b3a426e795293e72ede6705025d29de4e5bded8293b3c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM42K2042058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31be1b483dd18f61d755efd4932e912c43b7a225b61073e1e91f25859417312f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM42K2095948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9b2f048accfed4aa460984a17870b6d7184b2c467e1b0e6bfd05574149645d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZS652270833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f389f36e50421e004c94a66d9126592f9dda94cf7374de231c19cd8513c199c. 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/QZS652158298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c24c5d31e56f354465f0ea4cc057bd2c74140cb15aa2ce9d2cf055addef51e. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZS642160012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f97c0a5223032ddf7e176e013e923e60b67af2ae40ed638eb95346372b9a94c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZS662146085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbe324777d9a986b1166d271ba6cd0fe044b002a30c7ab56e8e91db0a80ff4e. 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/GBKQU1903148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c98ab0765ed930d74cf2cabf5b80c7096a621403d8c159ed81603e2aaef00cb. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBKQU1903149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa814538dd9599cccc55f4d5dc9c17b2a417d08d98e15f9de94387138f743d7a9. 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/GBKQU1903150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7dcdd199ac8208911c261e4c21542d41ecd61fca5e4c540fab1955e3ed2e08. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU1903151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddf7afc7f0939050becbddac5df26f0238e0debdf167eb6728a181e97381172. 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/GBKQU1903152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39331c44e26abc2cfb5c08a2bb1c90c63b401ff10b9e97621fd2b9e7010d4986. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU1903153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233f0483e66608296d5c88c6721ef1098c8cfd109360740fedcba1fdfd8d7f62. 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/QZS642147038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd22784144507e9c99acb291602e2b58e9378c6a490a95d8b1c1125361baccb. 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/QZS632193965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee82ebe5f7dd68b1b0b94ad484841ac469a2083b36973689cdf6140f4381ca43. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZS652135664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc905ac7a5da530ff36742ba91165c33d0439aed53ca6a044a2931e40abf80607. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QM42K2281507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4b7e7bedf8e3d37011543e8cffa04d30f058e51a0be69d6c5907854dee497c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS652151497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a686b6100ca9ebe35207bd6d20e3165969dce4feea5299678bc0f6123438467. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZS662192564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a89d37552c567721b6493143a6626d4f01c5e9f89f185f143bfe12c4102ef52. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZS642114151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66eba608d764fd30847b4bc2a0cdf9df4d987dac9d84b3660f58c676fb8a72e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS652128931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68479ba4754f7d180d2b6bf2c71949413f573ae71835c79e21debac6a8e2e6df. 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/QZS662198377.