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 0xc72c1f585dbfc1277aaaf131d20e70ffa4e9c270b25e97e40aeccf6795992c9f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a07dc18a-b715-4cb7-9a66-4dbff4500c40.json and https://artists.proofprofile.net/proofs/artist/a07dc18a-b715-4cb7-9a66-4dbff4500c40.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 0x157adcfa0bcb810c540dd9412a5821b80e1b9baefd3aac248a2d039f128b6af4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEB639111603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceacd4981dec71f0a0835b43b0c0c96a61fa7bf8434087b2b770b2bb8318a4c. 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/DEB639111604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674761c80e3802865e6987d64931904815fb3e36e9e8575e3551a715026bdcf6. 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/DEB639111605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776609e838b30cc6d353fe32ee4f448e89e521381972be133d0ff43a1b939f1c. 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/DEB639111606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530faf6141529f19b5e0b96997a909b888bc8a6de4b023d51799b6ef344e2022. 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/DEB639111607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f3ed9469f5bb79646f38fb8fe6b3eb5778b4e6c9e90fad66b965b17e96aa63. 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/DEB639111613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd93d23b74d5f63c223a3867dee77eb842f78dd7974220c9fc5f6617dbdaf5d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEB639111614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3f7ea44f4382086a10ffcaa87a3ded7def898b2c663b9025a1ebbc9bfe1829. 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/DEB639111615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefddef8f9fe7e4c38f58431df9b7645610535bbea5d9d859a7e5fac9cf7bbcb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEB639111617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29700c838a3b396fe2054694d9a218b593404c3e916ae92f21b0734ab6e2d316. 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/DEB639111601.
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 0x275fa51b4f99d2bd127e21e7b98c2c4d3190be2dfcf0fcbfd01fa9788e12fc49. 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/DEB639111602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0ff46aa3fd40d64de43f7997c8279902f2cff79b2d6951d2111cb87498c065. 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/DEB639111608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78655d56fe44b65ca59de0418278d8a194fd6d6801c97db6ee8c1631fa3ffd02. 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/DEB639111609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cb395fe4b086e13ea925d5f2ae689ff74ebdee508632be893811315c3b83b9. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DEB639111610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf09047569d0825d185d2926dae7a7f7ed21b136c6ec67d753358d1b0748098. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEB639111611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226963f3c2e27cc0d17c45298270163a7c2c68238600abf6a6cb9169d5fe276b. 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/DEB639111612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf269c534d89d2735de19fddffc7d5a6e22d8ed7be9dad6ef4d5c6178ec6e349b. 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/DEB639111618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7671b2ad53ab589819e8c81cdf9e5e984b8d03943f2aac02013d701a37c038. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEB639111619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01104fd0c5f9db777382ed0a2d6e9788cfb8aa5977590234042ffeed123921e0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEB639111620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0624a2a971ea9c0381c67609b1bb30a6577ae1e2ee30988eb84e6d5c4b3daa7. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEB639111622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3b1f9f875a5bdd0d752035d09ca897186b6c399c176df4bf45360e35e69ed4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEB639907012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf808f819f1fbedd57428ccce7a7a1d176ddd263cc93cc0e16ce841745c5ce4d1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEB639907001.
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