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 0xb4055017f3dca465d8f643216a654756962d872efa301caf9edb9554788c85bf. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0acbbbb-5f35-4fd8-86dc-a1baa377946d.json and https://artists.proofprofile.net/proofs/artist/c0acbbbb-5f35-4fd8-86dc-a1baa377946d.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 0x49f5dfbcfc12aa6f4ac1891687a15a167233a0bdf15d6b519575300476a80de0. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTAY2380524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d37a96aafe598a8ee7f71aaa202ba01e866542b52760db3f688d4ce21113f6. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZTAY2380525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cded1e0de40d49e403a803b6a2fb78ef612acb3bc71c3c0a9ef9bfcb899aed. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:17Z), 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/QZTAY2380526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4588bef8184ff64d77b001349481c6fbd063c20f437480ef164805ef5458cbbe. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAY2380527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dbbe01801a8c26757a6a659e113d77e711d770df4655acfb389515a0f8b644. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTAY2380528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea94228b18cb16fff36a6730efe8005ff1740e8c178f9da55deb21ce9acf316d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTAY2380529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02ed2c71b781b72a933073aad62fbcd51e89824910ae43b517232f91eca7340. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6P2409258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd6aa8dddc3048997d1da0aef2aefcce2f8294e2b84bd43faca498b2f0fe73f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:48:24Z), 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/USX9P2493048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818796ca1bd91582ecb80b96e37f7df30874343ba598c802778ae1f7a76eb11b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN62533777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e234e4766fe61771bec1a68ed01590d62e12083446205978bce7bb1186f168. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:57:49Z), 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/QZHN62533778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de4c1252294fad979d934474b646f43ef6e0f8b1cfcc44086d2a7ea34346727. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN62533779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fb70a67b03c91ab2551de8019a24ee99d1d497d08fb4f2b7a006fff6431c26. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN62533780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f39a9ed29d239db56a7a7fe9bbb85b79a84884e83bdb9febcebb6049a269303. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZHN62533781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ff73f298ac7b1f4addf71574f8d456f215c6a865e3e8e62dbe7ddb54f10a20. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN62533782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbb9fa161c683f19c4c73de52b1d1b0e0ef887087ee6d6571407ddb4310c7d1. 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/QZHN62533783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9006da77231daa472db5fdeaf574408ce3d7a563bf663cf345d039980018fc89. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZHN62533784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c3392ca3721c83fb3cae307c5696593d50cc59454b3f97d8a64a2820e66753. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:04:01Z), 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/QZHN62533785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8299520abdb07ef3be6fb4c95da505a39a365088a85b5a41a7025edbaf15be19. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN62533786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9d46e8d8d2cc17fb3088a7bcb28b4365d346395a7190ac7ee03d6b55a48ce9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZHN62533787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501f4a089aecca5ac04a3ebb710b3d2e6cc2d002d9774ba6e854074c2bd6a16a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN62533788.