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 0x5edc3923f3ba607e4d72bbe029cd7a30d13db0a406cea19bd170f99ea0b91555. 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/c782b13a-09fb-4b35-a602-8af0c4902093.json and https://artists.proofprofile.net/proofs/artist/c782b13a-09fb-4b35-a602-8af0c4902093.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 0x0118b1d11aa06ebdeb6539352ad224b7986be4972b3e9f309867304ba88989e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEN2444203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271fbf4784ea78acf7ff214b3f53a920fd4bc09d731c415c14d72c67010ea234. 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/QZMEN2444204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e9c4dec4bf514347d5312e799086a8c08909efffa778f8c2d611d1571961e0. 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/QZMEN2444205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1632165374b3be8d158877789bfb7ad4de10f194e3862e6ffb36a1408fdba7f2. 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/QZMEN2444206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a09102c9ed054e3c4830a4ef79851480027315077e44b7425eaef01e317c75e. 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/QZMEN2444207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9339c216f45707efface2464dea27ad6120d3007245b4aa1133eb70fc0aea735. 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/QZMEN2444208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57ec61b4da440b456bee9c1a248964e6e91580c53e0740ed787c3e922df6908. 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/QZMEN2444209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140e50a2d0963101be57d7e828d7a94bf27ed1e2e4ee8864e954ae084b88515d. 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/QZMEN2444210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229f0ba73fa0b756500efb5b033774aab85bfe9e13ebb6b98d7cce34b3c4d817. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEN2444211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dfb95657bd277889468973b48ba7166b5316c4075c40491f910b22f8211f6a. 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/QZMEN2444212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe3a349edef1dfcc544ada1c6db4a189b3c526c3dbde7449825ca8b76a560fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAGD2276849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb3941f25dea4f5ff55086d2ac9d6e228a1211eccf63d350c2ac0edb31798d6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAGD2276883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0416a241d89a9cd3e0127c09c435b277e3533523bc06f38dadcc5ff0919c0316. 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/TCAGD2276897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adb141260cd596e126917550fe95220e9b67c2ceb35511aa850aaefdbbbeac9. 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/TCAGD2276915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bd0d04f107b59edfd6185c77324a9d7a61c70cef629c673457d4bf9aefbeea. 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/TCAGD2276922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fcb10ea6593ad069082f90e7a970833a276867e16bfff71785a0ad2609292e. 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/TCAGD2276948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3261ba082b0b03337689696abc83d9828e2b7c2a9956a4c0a40c6cc5419504d. 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/TCAGD2276957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1072bbd18cf58614c9a9b890cfdd3723df4625cd24b68602502552a153b30d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAGD2276960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0416a241d89a9cd3e0127c09c435b277e3533523bc06f38dadcc5ff0919c0316. 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/TCAGD2276897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb3941f25dea4f5ff55086d2ac9d6e228a1211eccf63d350c2ac0edb31798d6. 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/TCAGD2276883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bd0d04f107b59edfd6185c77324a9d7a61c70cef629c673457d4bf9aefbeea. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:18:19Z), 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/TCAGD2276922.