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 0x5377cfb4609101ceea3256c809586cb6d82f850d5f5c442e0bf0d9a099abe2fb. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71335a09-4ddb-4213-bf86-f70dfa971bdb.json and https://artists.proofprofile.net/proofs/artist/71335a09-4ddb-4213-bf86-f70dfa971bdb.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 0x7f90bf29477eb9ae6b55d1a56710503bb7f4de0d00c8b28a7ad3c01ffdf9fd4d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZVEM2350791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568fa16b3994394dd821a11d9f1011c0b5b83b623653335631b617660648ec14. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZPEW2480705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940a7802f0eb80274e1411a5676baafa406c6e60ef1d1eebabb4923c02f6769e. 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/QZPEW2456151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4884dbee08ce01a4c5eb057fcdc55803359ed0ab2d06c6ba68257d1cfc6bb545. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:23:37Z), 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/TLVEM2485470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eb2e631b892eecae00af4e7ba72e1a041cffe25afd325efe0b332812c670e2. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZVEM1824370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99e78756afd363df2637ba656f44ec87681d724a388e1e632635c0427bbd356. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPEW2575743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201d7af7f4fbd31cc0f4f319a77a8e1f16f23e4380782fc41d8bd9f92aa19f69. 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/QT4K32539923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aaddc75eed2558863824dd34b9ccdb7d92f6a8fc33582683837b54aa63bb7a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT4K32539924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8774a2d71af0d513967beb626669f604cb28a598f35da4d69ea19da3abf934c5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT4K32539925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd92a29b80a7ea74170b48dbdf6ee546996be3198030b2ff421a14195edb0a4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QT4K32539926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbb41d742566267d200026133c4893983244eae5ba3bd97bd02a8b6ab42c453. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QT4K32539928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2013032054688c222ff73a93a6255d265d80963507a4c8cee160be67fa2489a8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QT4K32539929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1e3dcf76b89d3b4c13d7f8e254f76bb1f04ae2f82e24c6ffd9378a00beddf4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZPEW2533992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0097b144839739a9359a218345f1d99a88e63dee0d522ec3a5156f208a40e3eb. 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/QT4K32539930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038971f8896328ef8685ec8b23e2b888ef4f868b33564189203fdd6380aefd0f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QT4K32539931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74cd4567cf5633099723ea442c18cc5b5ffd779130e48547441809bdbbc2058. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZVEM2583983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea12907390df06ce9f0de7db81a4390613e248d3ebb6e876482aff84590ffb5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT4K52519815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f97ab934990620119f9e9d74c44d8a981959a0bc05829ab303135acdd6af92. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QT4K42561613.