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 0x1f076d81e331e7687c7eb6ab4f68b3a18de394f3806c842fb5a2ab18c5503ee8. 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/c4a2f76a-ff8e-466d-9e17-c8dfc7c2730d.json and https://artists.proofprofile.net/proofs/artist/c4a2f76a-ff8e-466d-9e17-c8dfc7c2730d.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 0x581f30bb7f9b17e9bf4554fb743a8023eb4eee4f768da4061eb124298a0867b8. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:42:06Z), 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/QZTBC2335968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bedebacc412816c3d4b01d71cbc2c48b5bbf373d90b7b50930f0f12c67f3bd. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:10Z), 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/QZWFJ2308134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c62883c2a8109011d66799f938ec1295ffbfa214096e241a1d82a1ead3e4ed. 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/QZHN92437168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f81ed3486eea41a61b948349d5b73d29e8221f167863b7b17d1f651fef0a231. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:28:29Z), 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/QZK6L2438788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef0e0f335df6e512dc7a9766d23a736d3712ea1d5dafd146f04d4716450ac25. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:25:20Z), 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/QZK6L2438792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d3a73f6318bd5e67f1c95610979e4f02dcf7d5b94ca1ae239a8f6318c17eb3. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T17:01:19Z), 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/QZK6L2438791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264be0c2a66f58459d0771297dda969db5a11899ba9228d14d323baeb9639c07. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6L2438786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea14bae75febc527838d9e430cbb152146635bf4c4fff2e3d85052685ca2e0c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:28:08Z), 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/QZK6L2438789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b30ec859c40a23fd7804879a419b2ed8a4cb44d05f1cf39ed36bd102db73aa9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:10:42Z), 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/QZDA42497876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd782a3acebae68644919d57f3dd50cb6ca1f35826f91c5f81b464f4e6d9a8637. 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/QZTBC2335971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd66e5cd030a4a3f66365be1af8dc57e1ec1e02f7c4815984ccd57d3414c9bc9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA42496543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11dfadf1006b1a879d8c5109b460babb03eed61f2e83cb57402a851cdd54452. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:10:28Z), 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/QZDA42498020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a868d395f667add1faec3d2808a5e96079a3f13bf15290e3e1f7ebf796daf7. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:07:17Z), 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/QZDA42497825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5107e2d46a85dee2c7308e6d2f8356b2eefcbefbe4ef4c3a768c739914bb18e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN92436911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf056b91c747a1314e1b174ab613ec1fcaf3773e27b64c141bc459c04350efd27. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN92436151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bf63c4a1438abbe3de04d2eff831201d7a36f32b65e1dc6f602c68f632d0d2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:03:44Z), 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/QZTBC2494552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4cea2e37cd0aea1c6458203743f643d624f8eff4a4a57cbd4642ae60c07637. 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/QZTBD2428737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569ea5b28d1bf7053ad342fb93f17b668db0b3c1482d7f1c55aa3dc58099509c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZTBD2427533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3330b438697ed60d235b548cc8c727512fcd723bd58f8d45bc3a342536d8041. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZTBD2472936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63724eb84bc75673b4ab67178944f95fb08420901a234afbc7cf53115db7c2fe. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBD2428777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b47b0ed0c13586af97ee9e5cfa0358a1355630913882befa57e380331407865. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBD2428773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b545e6a198561f8d105ed1b28dfd98e5b148a722b228b38fb429cb6bcf8c501. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:19:27Z), 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/QT3F72544487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8d1f5fbf60e4eb5c702e3adb0286fdb83c7c03bb76f4ff7da22cf0ef1bb696. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3F72542201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11c9e90f7fb670c9a61d2cf2b569acb5b5c39d9b0d0d657e7ad90c8a5263488. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:14:39Z), 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/QT3F72544492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa64ed43d6fbfa59636cb846f69ceb7055220fae67103f06fe0a407a4a374a6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3F72544537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556c22b7c23d818388daeed066c48c0fdd023a10ed510afa67bdf3f998a83742. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QT3F72544502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c0e891644a4e86d013741e4c8e3699b388759d7cc9a93bcb018a088042d994. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3F72544454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089f5db089d1aca3e401cc6a38dd35cce9c2444afab9ff9d7906f310d74b690d. 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/QT3F72544426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15cad369280554f979b9d7bad4d7b34216228aa29a0796276c5edc19d1c6a9a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F72544476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742bd2684d2fc233dc9f52ff1d3fd6135299bbc067950cbe5c4796ceb638fb88. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QT3F72544437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43447ece931839e943c5b5ba311fae79b7feb913202d3325718e39948585a505. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QT3F72544505.