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 0x8a3cf9fed11ab1377af3cef2131034fff233fea28baafe0eea8c4126bf9c9e87. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a44be842-95f7-41c0-8de9-78e4faa6c7dc.json and https://artists.proofprofile.net/proofs/artist/a44be842-95f7-41c0-8de9-78e4faa6c7dc.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 0xab85604ef5034420fc373b2aa4be4ca750d8f61ead5db461fd71494018e19299. 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/USAKS0600425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8448cd4fa376d9c79fc79eaec3f34b1f7c556b1552800b899a4aa7a4415a59. 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/USAKS0600426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c8f22fe503e09b8ee9f190876c7d4168f5d81377c94ed6257e8bc9f06cd495. 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/USAKS0600429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc696d1faf9736f77c214f28c8b4c4e02a23aa831ef0e6ca1971af30c1dd86c33. 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/USAKS0600432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb5abf841e1ac7b4271919ad761f4fddf1536a20e828f04e88d634d7f45c777. 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/USAKS0501832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3867ef8e790104181d05d6cd4be78413cde6164a67836cc1a384218f4ba3bcc. 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/USAKS0501833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4c61137330198a2d34afd1bbc6ad18a725b9970874440cba2de8d2eb624238. 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/USAKS0501835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b60556a4f3523440e561eec5f15b5b470379a050bf7bb2d5ca911edc6d8648. 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/USAKS0501840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa503159070a9f31f79dc01874c5210d4134600130c8a79457a42391e573fe384. 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/USAKS0501841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1763e27b2c0eafef136462c6acbf8960bf0aad2084c86f01625a166be16a7044. 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/USAKS0501842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb804f99e5f70b63b76adcb705029f979c66cb391b391c93b111fb83f8c3645. 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/USAKS0501843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77520b57b607f7a8391a00ec35e27d1a2d969f654a2eeb85efa146276511e310. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/USAKS0501815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa353e34d09098ead1517b96d463f61496352919fc4affa99bb4fb5b5aff3e1ed. 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/USAKS0501816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcb0c1fb62d1c5bfde614c5ed4df3bb5f59d1b37a1c27d7d77764f889f3e819. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USAKS0501817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836231d301486d70d9959c36a39390db417e9de030196a8ca2d1e4c850d84dc0. 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/USAKS0501823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cecc41af0d053d44fc6e1b987642e3da5a6e85f9d9f2376d6509affb46ddb8b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USAKS0501824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024ae51820517d884c1ac1a90b0184548cf0a166b457eb8d3b271e3954c3c2b1. 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/USAKS0501825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3654ca23bc18bfdec8e975ed97ab2998c50009333739f48b23321e733cd071. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USAKS0501828.