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 0xf3a4a43df1b889f70cbcbd0dd652b6156c4f8a0e8412ff3753728d9c65deac3d. 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/ece37685-a3a6-4c71-b87d-7d469edc28ab.json and https://artists.proofprofile.net/proofs/artist/ece37685-a3a6-4c71-b87d-7d469edc28ab.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 0x830f606a04927c01b5a41c875a7d30549d2638c819f0dfad30e542a96ab04ba6. 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/QZGLM2410229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ea34b4cb06ccd4484161b0d9ee6698911f11f39b61f00eff053ac1c4e88d39. 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/US7VG2425724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb745cdb4ce96c7b1136488d867fa3e88fe5f5c26f63d2189c641080a65116ece. 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/QZ5AB2470213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23e3a51a85bc54b4d615cc9b98954d3d92b56a49cd9f4ff9693ca1ded0756f1. 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/QZGLS2396066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb850013ca09f7e23443233f47fc51074ea51e798c0903a57c36ed600058d4f0. 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/QZGLM2410230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba48d803179d28268edc376d111570f8da40568449132722e06c71a839e6b911. 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/QZGLM2410231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb745cdb4ce96c7b1136488d867fa3e88fe5f5c26f63d2189c641080a65116ece. 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/QZ5AB2470213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ea34b4cb06ccd4484161b0d9ee6698911f11f39b61f00eff053ac1c4e88d39. 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/US7VG2425724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d73f998ed0b2f708bc7c7d043fd092be1a1890755a7bd95e205996796554701. 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/QZW9L2352765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23e3a51a85bc54b4d615cc9b98954d3d92b56a49cd9f4ff9693ca1ded0756f1. 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/QZGLS2396066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5395eb723ee9e622ae09fded7031d6fdf79625e46b664f58790a461b4cefbcb5. 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/ES71G2246967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712d805d4335e913e20647f6117d985b57ddc354f97aea8903a6e4e355b243bd. 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/ES71G2239591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe357fdae308e8941540c94590ff0c8ff1a66329739a64703a7298e403bf5137c. 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/ES71G2304478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1066ae4a4072541ef193a8bde27d355be47dfc3176a16ba52508f73c0d88dbda. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ES71G2304479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacf5c89c6eaec0374d2dc76a205711313d95230c33c42b1e462665a1c5294b9. 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/ES71G2304480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3f0570f357b18cb6dd5880bf5210db8683f8f66d9148e459ab515dd1c243c9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES71G2302504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8acff2e9bf371b637b272d7dcdf097702ee4ea0be6451b4ed323cc143587c09. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ES71G2331678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7078aad9fe59970bf91e279cfe577659cb7c6eb7de520e614046939a6cb28500. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES71G2331685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e855a15333efa8255cfff4c59fec3fe857e2e1a32589924ff72c57bace595f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES71G2330262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7a39439abacb55ed24806f572388d7c985e61f1300119a4f3248e3cc4b934b. 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/ES71G2331679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6b5b3198d872febb2fec88f67d0deb8a6e123c023e5ad377bdd0ab8653c920. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES71G2331680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3528bd7b0252cba5124e9da5f00835f68088f7d3c658e2f21417d94e82a0923a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ES71G2331681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc1fc6781fb92b93e8520483d12d5556c4c6eb7b224a062cd920be39e99f654. 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/ES71G2331682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1677c62bb1e65e912be8f0fa4ac9d8600e5dac91952541f415f9e40880599a5. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/ES71G2331683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb54a5a6ac9705454f172a9be0f69317c22be699aeb8c85903de4a7a4da3051. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/ES71G2329657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b973da11d2966bbc20167840c74313c5cd3dfdf1bbae15fb767fb479615e572. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/ES71G2331684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7161e5eda2bc5fe229255e2d6b13815f2805c0735743e06094436e1edb5c00. 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/ES71G2331824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730325cd5f769b51dff7e1a4e6a1230a86ef4f0f3360aeeadfbfe484eddac3ca. 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/ES71G2331686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758c5f4e980bf138dc4412f9fa3ebc81c9a41ab38ff6da346072fa55e5e266dc. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES71G2305453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe828d29e8b76b85b57a8db3404cbaa48f3ac9b0de9f497c689d99504005c2e3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES71G2233554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1812c263a80f356e7471c2c58d55dbf7d7168dc18d93c6a059c8969c426b9c27. 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/ES71G2244459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6677aae1756ac09e80a1008d57a64b43ddd0359ecb115111189c205cc3ed5df1. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES71G2244461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5395eb723ee9e622ae09fded7031d6fdf79625e46b664f58790a461b4cefbcb5. 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/ES71G2246967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3879dd749383df5208ee9be46e3d9541e57a529ffd423b87c23fdc6e64db7cf8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/MX3741900918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928e66acbf4cfdabe64acf55a23bddf242268979e272983ad9e5572e1e71b07a. 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/US7VG2557863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd03432decd360de7e85e182ce854be293f1c888466669733ca53799d2930ed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZW9K2404289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f3af450640e82f40f5ddd3f65db60d645e075fdca76a3a7644eaddc30b0a06. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZ5AB2446337.