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 0x5ae5e3eefe7954ca1eb3ef05669a9f0916954c110d2ed311c14e179aa3a50a38. 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/242d9eb5-0111-45ee-862a-6b5e4322de73.json and https://artists.proofprofile.net/proofs/artist/242d9eb5-0111-45ee-862a-6b5e4322de73.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 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 0x097e57f1a38f57d0c9b6a6f19f235a3511e2267f963403c047ce5906c6eafb7e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZ5AB2394535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9259911696eede88b2f353e4da062b4c93d14fea055bc5f1b108d59f645e2bed. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZGLS2307082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2125aa9fb877d7b539eceda1de3849ccf7a46d594ecbffb34d9fd7ae052d5ec6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJV2395389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fe8942651c94b141ee16c3d53ddd75f957214a54616a836893c88de7aa0cd6. 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/QZW9M2352853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed20484575656c34d2d800ce03730da47f168653a0b651ac1a728ed8d75a70b9. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZ5AB2463278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cd7fda311cf48dc98e39e8d685e8ba34f1cc453740fd95ff4101eb6be7dee0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZGLM2450678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531d2719900451fd24d1c7b37f19601c918dab0efbed69912bc9644bd6ab44b7. 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/QZGLM2450676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132ac58a988a8f489b0a6c56f1a2999a04ea32847d40cd9a643a2f093942285e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGLM2450679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefc5b0d391b9ca42e9ad192ac99bc78896b30b5a7eda8af175bd5dd748ff9c0. 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/QZGLM2450681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a30342a30fd266af358a48e057b8aca3630725ab621895fa461a486dc512882. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZGLM2450682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73793affd4aa184fa1e06dfab625c59608dc9b1e2e4f446d139db07ad20edb2. 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/QZGLM2450683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c82d77712a04f82842fb71517b4ae61367c2b93b90d5913650db53547c12230. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZGLM2450684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7f8e5e81621f0bd055e8613fe37749d6188ab25e5028ada6f15381a3ed45ce. 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/QZGLM2450685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062d8fbbc54f3d1b1e69770fe4c31b7c711d162a0e03cf0d830c5716f3bfd298. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJX2442403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb7db70b3db3b432ce071efb3157bb5c33a4dc6deb9965b128d045105df20ab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJY2405212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cfeff54df9a3d60963ac0dec311b87e94a0c164faa56fdd3ca27f8238ca227. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BCXK92400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b3ce38a9ad4ecb2ba71a1e6fc1942a5ebcc47e871467aa5e944d4e117737fa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLS2551179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e35b1f8fc1929d23ab524ad332130c456045f139cef7f06e12a656f0c7d362. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BKZ3B2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d93cb8d74a8f587476d73ce06e365b27fa57191b644f758b6c6bf22f75966f8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/BKZ3B2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c16b5854f61cc1d04d39bec834846e8af925474524cc42cdf44ef74de15c254. 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/BKG212400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bffcd6803ade30ca96956569166dc16277ce1c36d67c9ee9a1b3ea328835f04. 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/UKXN22384101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc618188f0e588e31d670b4f1132e92c978da7dcb955a064311d939bf7bcf6af1. 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/GXD7G2478564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804cb4442780437da2858db23383986b5690fd0d4c88524e5040423ddb25bf8d. 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/BKG212500005.