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 0xe9e2f5bf5251aff62dc572c543960e83a6cbee4dfe16c5e7c5e3c33c847efddc. 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/a710df6a-58eb-488e-b0af-545cf73dbc3e.json and https://artists.proofprofile.net/proofs/artist/a710df6a-58eb-488e-b0af-545cf73dbc3e.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 0x8f88bd7cf4ba0782b5762420143ee93cb2e506c7e9ab3c416ae61fce827ef0bf. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/US4E41304901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4c2c518bf01d8b9c4ec320fb366fad7395576e80c81b1d4611f6361a85cb07. 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/US4E41304905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3a77028cff89c586accdaca91563de3a906c335e9d646933ebfef82378a88d. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/US4E41304910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729d759ce55d4ed7950f825dce5e306914d951c36e58ca803bbb80eee4797592. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/US4E41304907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201f70c04297c25165b13897e84e53e0134f3e07bd6e0b3bc8135e9adf412c79. 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/US4E41631801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6d1dbae0987ed60ac35fc9fcfb502485d4c7b5080eca411ff8c434ea3fe730. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US4E41631804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff05705137d9c31b55af598e020f99f8707c93d25109b9bfab1d1927f957395. 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/US4E41631805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd796ada7ad4618dcb9a5576b882fb26072908fbf1558dc37e4ecdd65be64d82. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US4E41631807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43f3dfacd7c348bd2016ce245d9cb891e5a9059dd274bbfb25a3cfc3904a55a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US4E41631808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd25ad5611b2fcf0c6916b920c02867bba9f2cba0a8538fcd36d3d081315afac. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/US4E41631809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ade4474976aac904d898d6e92d20ffeac2c592514a3b44f2cabd4e28becc5e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBDHC1911503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15763aa6123b205fbc24719c68110a5d07f4651dde69a234a82c3531e0f8c75. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GBDHC1911502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0679e0f1f550d0f64247f52b1570f4a3ad433e3b329bee3a62a97c4653d3a842. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBDHC1911501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ade4474976aac904d898d6e92d20ffeac2c592514a3b44f2cabd4e28becc5e. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GBDHC1911503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a4f7cad909d27d74fe36e7ff6d8e79f13fa5a7f9c66587320b0f3e5e18f24a. 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/GBDHC1911504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4601408f72000498ec4b12eed5607c692acc273fb4ae82bd413a3b26cc91a938. 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/GBDHC1911505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ae0b07f8a5235c2b7880e5c15c824bd54dec602a58cfd77cf53f0afddeba4b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBDHC1911506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1a143ac27bad8a2276ad77b9cb0b4c41be3d9a727a16bd3e114871234a181d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBDHC1911507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e4ffcf43134bdad3e48032e91672b7a7117ab9e9e6bd476c3f1260c37fb5ce. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBDHC2124601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4874673e611ef9caf391368a15114740f2ca31ca812330e73122a79bfb7ced0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SEVVF2301203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e8e666e2b7761a0c2808525c3031f215c7d4e226a739fc83af6b2ac4b1ace4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/SEVVF2301206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb296ecedca4da720dc5308b4270a4b13ea84113e81c4e616aaa19f8e895163e7. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/SEVVF2301208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed4e69ea85362408c72fa7cc5b8dc2635bd3d0164b760c7ff8b71c5e17c4453. 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/SEVVF2301209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ebd3581be1fd1f50ec554fded6ecf6a24fda07f63fe09a6516b6ffa37524f2. 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/SEVVF2301210.