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 0x59fe53e0d400404c53113f852d248069b915a1bd6c9ed5488dbdd3055f5297a7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d3f8429-edbf-40df-a8ea-97f5aa68749b.json and https://artists.proofprofile.net/proofs/artist/8d3f8429-edbf-40df-a8ea-97f5aa68749b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sanctuary: Peaceful Flute for Meditation
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 0x0bc3ec2bf45fc0b878f2072e4fc9849ffff60350da5b392c2a5b69d0277fe8ba. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM91111166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d0bc83a98f2bf498fd6a5f0b55c763c28289fcee03b37fae83005f597d82b5. 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/USCGJ1609604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0649648d9540944f9c34dff026f512410c0eae6d0365ca57aea3d3a4e4577789. 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/USCGJ1609605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdda9b1ade8edf292c8a48c7246e34e21e080cd47b468153fde34a0569e0dae. 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/USCGJ1609606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4337f63225a3b6168f9d35432317f7e6aaed15e50b21f070d031104e451877. 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/QZ6BJ1700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485a813dcd91759d38c60b357f136492cf0a19aaa3c086f6618812d51e9dcd63. 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/QZ6BJ1700302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122ebdaed09d3dfe47796dc82f235c65b7a2cee25f3a13f3164e451864b163d0. 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/QZ6BJ1803701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913b7f1f51724717468e4bb28e901e83000e57a1085fad943fa7f966fd5a0a8b. 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/QM9AA1641958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43ef7b5f251a961eba57e134e95176cc794ee4a1b62138502d227c49ecbb44e. 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/QZ6BJ1803703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c797533fc4e0c6019d67e26a33e9bb95c7db80c0c4f6cc75565f56a3d970d0e. 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/USHM21370953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb07a9ef2229db8d025eb95fc24a69522b5fe98417ae8ebab158ff74a89a9374. 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/QZ6BJ1801701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c429288685a934ee3e427beeebb531b259d1765d75e1cc2c9c34c702da59c80. 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/QZ6BJ1700311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bae0411c4d40568aa78d763ea9c255dd00a152e41a83c2ea63824839b801c3. 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/QZ6BJ1803702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9fd6b35cc72afe3fa3aa38195a4b6814bb6e2ebc4021838af72d9490e64a5c. 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/QZ6BJ1800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7e1a73897b46af2ca0514ed2890d38ee3f593a77a0c500677b4122689e1d8c. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZ6BJ1803705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a166531f9791d06f1fef357c92645d3a104a8b5177549995fcba3432f07f199. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ6BJ1803704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c7eba3a99ddae5079f9ed3e49be01906a09b95ce520fab30ade3c452f6d3b9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZ6BJ1902604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf20d45225d3cf2295b263c55f4f13a72e5723a2be9590e96187b51e482e741. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZ6BJ1902607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7488ce2969310e9f2ce8aac184a8603f64c26d7c2103e56dd49c3330a175cc5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZ6BJ2000701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cbeb4d2b52d996fd9d185be38598e0a015e89b665a0a86f57961b36a48f21c. 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/QZ6BJ2005601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0763f9b5ed3170dbfd18cdb5c5cec40cb8ae5bd278c07b31e4b74a170475cc9b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZ6BJ2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282e0bcb93c19484709d6f45b9bb5ded9a42935a6a631a5cb4a05fc304554696. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ6BJ2106301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce62e6929214a96fea0f5de31daa8adc05b7a6969b2424fbf72859a1903032c. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZ6BJ2204903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e029a5fc18251b1279073a10939f68c4183235663dc71193ba03b1b8231e52. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZ6BJ2305007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50ae14a5502b4be08f3be2e9b739fb75b3167527ddd5bcdcef29dea9c87d756. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ6BJ2305008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06a177f6de25793fba3a3da13019ca531572b119c87d471de1fa7149b4fff1f. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZ6BJ2401601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe50ffb152c7d8fb0ee35dcff80921383212095f999913b37d6682d2b68ea00. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZ6BJ2401602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3041df0a03a2d6f8488d9ccdea5b79049fd3a42e32ab5af3d34bea5ccb9aa5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ6BJ2407501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dd9b6d8ca2d8e7fef19d6c509f27bb11399925a001918f2808d5833a9eeb07. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZ6BJ2500802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12539c1b146b4928f7420282a813f607f3e0c7af029ca67099bc4cb38526f774. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QZ6BJ2500804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e8a49ec9ffe73cc391d0e7cff5cdff82a33f8525cb7e477b1c17d43b021ff1. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZ6BJ2500807.