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 0x220ebcb55d181cf8163d1ae38834f8b9e07f005b27bf909f53f4804454ebe736. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab715cbd-3995-41de-88a9-2889c8c5d3ab.json and https://artists.proofprofile.net/proofs/artist/ab715cbd-3995-41de-88a9-2889c8c5d3ab.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 0x185511491acb6fdc91764d324fee47264a4dd6cf262174373dee4763e73302e3. 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/TWCC32123656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac4b2ff37e8c677bcde58613c7957ee018862c1a3e6b1f0865688ee2639e983. 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/TWCC32123657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d56e2b6e4da3ed42d4f3c611340722da0ef071f16b35b686b640e48e77ed05. 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/TWCC32123658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11209410dcec5ff132a21de70370707be35246904c7c5642653c3c82a4d0bcdd. 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/TWCC32123659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a34a285bf4bb380bf6e9ebc1e4048106a7015628725cd563922f720dc90661e. 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/TWCC32123660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01cb71257ca78a388949452ae6553b192eabc7e70fc0eed78ba139b3da8fba9. 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/TWCC32123661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d68fe9b907289d5d42e2d88daf09dae69329105d194ea194d80cfc13b24dc8. 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/TWCC32123662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7890b35fdd67e4b2539849dd78da9d8ebef80e5060c7d82968146b3bc8b3886. 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/TWCC32123663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee52c33a851abc5bc673609c3e3cd14bd28bf1024a3cade2921f96a51814cc55. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWCC32123664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a5c361120e09457f8d8519830a3e2a40b59b22f6556b17db0c9ddd506cbd50. 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/TWCC32123665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb7af5e9cfb74d4a2c5639ba3c533563a656ac6fbd4d985c9711ee7157becd3. 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/TWCC32123666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbd925deda7dcf64baddb805e3ccdc9af3e041be002d289e27a38204ec2ae1d. 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/TWCC32123667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8f5aff5f0e4c6b12b9de84d7a5d1c6f6c608e6ca4e0010915a5591b760bbba. 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/TWA452300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b841d7656b644acbef46df7f87e49ce78af1056324bbefbbed060d4ecc262d. 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/TWCC32122361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd514268e5b69e9168394396a8271a22bd45b4b6c94aa2f88538188c04fe1375e. 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/TWB879601806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edc3b60eb2f38e9717fcee861be18ff520a7f02558500d4e124f9d2cea06705. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWA451900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc1449cc3988759982d6a9ae994e2627f553be3782b303cb26f16c456d95afd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWA452313605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8f5aff5f0e4c6b12b9de84d7a5d1c6f6c608e6ca4e0010915a5591b760bbba. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA452300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c4cdc18d3c0720145ccc34a09cb870a972ac349e87e5c688cc562239e5ca57. 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/TWA452313608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e283392c9bc139bc259de51e3982852b19868144dcd8a11ff7f1cc223b53a01. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWA451900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c301e30d59ba1a92237da08de83694ed3689eea84d82132880c3f136846bf33. 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/TWA452313611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33b4bac139d4a53e8939da5852e20a71d877f05d7e7b6a2a457277445fc875b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWA452200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfb9f0c2fb0285bb66f453a76d36f052487724c8755266d9950b64778600dfb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWA452313614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85423d16abd0e97a4c367fcc91a8df2313cd2a9e443c237752347f109318007f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA452313615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9753fb7dcd5dd9d6e8d6a9f92bf6c6dfbd6b37fcebed5a73bc8d6d574731536d. 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/TWA452200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01408e1be0761da5c552543b600120273984aa1454949fc5947ab81c4295b8b1. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TWA452313622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cff5d4a59f609ba60431f2dab8b7a59e7684ae3f044f603ad67905060968bf. 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/TWCC32007571.