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 0xee1ce1ca0e9dd82437ffb1d139b56c6a6966d44f5ba4362cc64b51702ab8313e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91a89fd2-6684-43ad-9219-78d845884397.json and https://artists.proofprofile.net/proofs/artist/91a89fd2-6684-43ad-9219-78d845884397.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 0x9bd7f7576813859ef1805d42b98180ef5e246e200a24d8aa548d0382dcabe3c5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:19:14Z), 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/QZES82035986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d40675454e21ab51f5c5a221a6d7d291b7de4df4dd05ba4a66c9165d3fd95f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6F2066157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1920c316968a8d4b65d92b6e67950d9739518cbc303c3836e6dc1bb94ef8b18. 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/QZQAY2141722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230692a1d9f2af7d476fa1a508b3814e60debbbecab2512f078133204c20778f. 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/QZQAY2122562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35701114ebe70efc6537f4522366d52ba025f6451ac5aaaa58e10d201753d14f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZQAY2126687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a69c75049638e2b67a55799664af21bb44f0cb67c14dcf1f9dbcea80600ea5. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZQAY2138812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5869006f49b8392aae4bf5646b682a41fd2e6300d5be6027e14e7ad97d8218b3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZQAY2180832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0568966a6800ee50cbe84dedf50091ae2bf0f6f89cb63d6d3decc4955eb549ce. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZS7J2165366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b7cb9852c01e7716890d8fd4ce2ce5d9ef17e81cee26ea584035ab28a3ab68. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZS7J2192880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8797086609a4e41ed6cdd3ab5e9c338fd2edf4177c5606ac0f3afbc3c2e602df. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZS7J2184310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c935debf05cfe556aad61818b9c8ef1920c2110948b0de6860678e41d956b2. 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/QZS7J2226794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b15c3b19fc97673e8a30cf32d2710192a7fb6c4597ff762db997db2bc38a620. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZS7J2227879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5621ef9fe742d80ce75d11b7595f80a6de2fd5f4d3613beda2ca92e8069e4628. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZSYP2294357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad9aaa504c82666d98afe3ce2469f4fa5a7dd7aa7c9fce09ab235809d0f1b70. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZSYP2214976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3362663b9a5fb8f14294bbdfd233ccbcc7ce3f0312ffe60e498ff5bf3a419c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:48:32Z), 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/QZSYP2227501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf80944dfa2db7781c5a0130ca194a5a08390a98c03733c222b27f4aa006cea5. 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/QZSYP2222015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f1768aefdaa746f96488a1b54ca5c8c9025b56a3ec145d25e1bede108d0493. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZSYP2282465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3dff6725fcbf446a9012ddc20de01bf1d8a3f02072df934319384b59050d1c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:39:37Z), 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/QZSYP2234277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06fb3ba2c7249e66d2fa23c01f841dfa7fe12206db6c9c132e8eff4e2ad29e5. 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/QZQAY2316631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10b914195f2ecc621e49007c95c26e050dcc4ff143083633f960b789d088fea. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZQAY2319520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5466f6ae3e2cda0545f03ad64e67007b8495d0939c9cba91c908751c232cb9d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZS7J2307990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd43d2d943323692eab7598e47910de52eca56099909ad82764579cb301c634. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZS7J2388740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59a6c0aa18758dd9787105f996ce85794290ce62f17f5e08a533680a28244fa. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:15:36Z), 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/QZQAY2412713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20371a27ccf651d3f2107f7f3139e20776c64c61d7769476971101d75e85f5bd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZQAY2466671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb278f79293b787d95306a8d1bf1085bb922b801135142d073af30c9971b76a4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZSYP2580819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd526c380f9169f05159e46781612349ff5f4db4f8cd458a0ea5b485a5801756. 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/NL8RL2531478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95678fe6d50a9586d6e7a4bf7e4a08eb71435199d4e2e0d6f2f77d06e8d5e879. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFX2504855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1590d40b420deec553b6bca10c619d168842fc4a3e174b16e9c4ad4ae30f3d66. 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/USUM72119754.