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 0x82a8b591c26d2ba1d76a895ba2574f6430d79f0271dc2d59ad500e6bf097ffae. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e8dc5f3-396f-4ccb-9a5d-04f567bf5d71.json and https://artists.proofprofile.net/proofs/artist/9e8dc5f3-396f-4ccb-9a5d-04f567bf5d71.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 0x4ef60439ca531cf99d8685ba148ab94e30d96c14ee292e78ddb27852ebf99994. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USHM92474265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2259cc75f1733269d0f0bb0bffe47e64ad2a87dd728f69f7fae2dfb71707b461. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ0859918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325e81c9a0ee762c0d49a450b125ede62decf5f30b9f669920824b67a042da5b. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:05:12Z), 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/GBMA22499824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3803ce961a8451b4a7cc4c4f1cff07079cbd1af47ec841987ee53a1af5d0a243. 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/GBMA22499827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bdc2075cce3a68f2c316a0f604c8c230ce2edf19ecb0bbfd7812831f17ee2d. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:19:10Z), 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/GBMA22499830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd299e5db08dca8f3582aa46d8ca7ad2b0a47679c91638007a1005e89bfcaa427. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:58:12Z), 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/GBMA22499831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafc081aab561465f1153634cf3dcdd59046c98c2d59430c483385d69edbc787. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USX9P2455073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0e4a4ad274544df932e218c5ddcc89c713606ce574e1a0cb8ef6e588ee202f. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:55Z), 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/USX9P2455075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd696022b4eb5f375dc13e4d098519e3cd2faff35cf2d9e36b6f01fbcbbd7f6e1. 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/USX9P2455078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e0846cf4305e546123a444a4b8b2381c0cb7322b38c27a30330c2f789a60af. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USX9P2455079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd13676a6cf55cbe9925a14cb4d29deae75390afc2451dcf78f085e173ab17a0. 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/USCGH2070132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c2f9afd5c2a3a95db2d119e701c63556db49d6d85ba24cede0a7f047ebc81c. 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/USCGH2070139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75a17324d79d8fb574e87f6969c93b1393a5693745bd25b325e630081fc653e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USDY42545057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa886f5b4be3f7eda9bdd825b47e6328aad945e3d422967b3e361874e724e97a6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USDY42545058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c8254be4301e5bb6023f70708e4f61b9a9526b5e15ba5ab66cacff5c2a7014. 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/USDY42545061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbe0898f95cd4b0ca735d1ed73adc8acc0e211e2889ec974118da63e6160f10. 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/USDY42545062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe4eec6e5c8e2138128dc5057c304b9c122deadda2b7037d5cd3567958f5c4c. 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/USDY42545064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8c4f45bb8c7c31b4ed17557409e98e6558a1941dd357cb6e0ef6985f42689c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USDY42545065.