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 0x267a87b8f8a2bf007eec63d8551a19ce86120ef58a24dc3695f84d74c9ebf7eb. 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/1374c636-9e89-4ccf-8a50-91f48946471c.json and https://artists.proofprofile.net/proofs/artist/1374c636-9e89-4ccf-8a50-91f48946471c.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 0xe2d9ec3ced197fe0faa6ac8e83bb4700bb827e05e64648bcbcade8f17b83f1f4. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:01:32Z), 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/QZ7R41850404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235b9f1118ac24874053e7fd8749516bb7b4be7d9e4c1829d6f661ade3984b99. 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/QZ7R41850716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfee6d3d2c5bd055087b4b0cc3fbe86d11af2cb01c0e48f16221248b1cb850d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:37:46Z), 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/QZ7R41850799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9f80882065a259ff0a9d60d4d5fe81347da7d7b049557257cfb8626158f559. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZ7R41852950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15d1cd3886843c9c146811e34acd98540fa1f9831c672c2adc62f2a487abec1. 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/QZ7R41853034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01ddb8ff026e676c6dbb53397082e40ebea7c69d19e1cfaa5b05c8c082ddb18. 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/QZ7R41853036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd953123d36522765490d78063419b76925770cdc285d3f2692c0ae05211741a5. 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/QZ7R41853037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c74f478bcb77b79bb9846237ba0452e5b32093b9dbcc079b95e0f27b2d40a2. 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/QZ7R41853038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669548b189d8e04ac3278d59117a50e3a5c757d52eb00bb3535751b793591378. 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/QZ7R41853039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a035b8edba1762f7fed739e0c578cddfa2bafe94b2c3377b907212c450012d7. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZ7R41853040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136913c79cbb6644df274c16ed7f539db59fe17c3dfa63bfe68a6b0b71fc0a34. 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/QZ7R41853041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1640f1ff9e7b01b9bbb6d81e4bc06ff60bc4bbfde0636528f4286ebd438f39. 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/QZ7R41853042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac8341b0c3824b97734bf7795a1f8e44f974fc993c6b9035ae2c6aeeb42d317. 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/QZ7R41853043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f525970f03ee24cfceea81d718ecba80ddcf532752ee7b83b51bba87d598142. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZ7R41853035.
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 0x9675112de6551de780e0ed639778c6943934a134fd173e050c02f9fcf07d1568. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZ7R41853116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96634f8a44ff37094edcab4a53cfc638980fcfa44435098c808c2e613bc7a086. 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/QZ7R41853125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9216af03d249fb161f704c164ff5e155331bab20ddbbeb19e168840ebfece7ad. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:27:35Z), 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/QZ7R41853453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e6849e0a409bbd902f343c86e574484b25a507da0ce01c999c8ef28cab4c5f. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZ7R41950408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865151b3ec6252cf7cde4810985d08a0f3dcfa914aab4c298df227d26ee70836. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ7R41950416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edbffe09d9abca78c979ea43190c80be2cc0c60e552bbd2cde12720280dd323. 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/QZ7R41950555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0325b4a7356f8c643352fe18dc22f5014f7c9a19857ce5cdcf50b1f56fc8c66d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZ7R41951244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ec42417108c73de68606838909c2fc9ab0503dfdbbd2353cc72e9d22128b54. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:20:22Z), 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/QZ7R41952104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f5eb6128a463a48e79e77ab3ff1cae164502e9de3c1a8e35312111f330034f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:52:36Z), 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/QZ7R41952308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15b64578281945f7d2633352db28b802387a44146109cacfb27c8e2f5335228. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:24Z), 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/QZ7R42052995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c69e79bb5c3694f6807f9fdeafe44c6c8835b071434b9f69870cf4a7a5d0d8a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:15:28Z), 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/QZ7R42151940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a4a7cc01780725228515e5ffa35b6f0386dfff7b9239b42bad0ced7c8003ff. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZ7R42250677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068add3c529a8717ee7733232976dbd8454d4cf4ed66727be8271eb8221f495c. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZ7R42455057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399dc66eb375ef5b5f160e7554bf35916ead49ec59aaf2c63b99aa9e20c74413. 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/QZ7R42455350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd235a9e3f6adf23cf3cc6cc12ba5673c5b7fd0e1a5342729bef5427f7f098201. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:40Z), 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/QZ7R42455738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873778ebf91c9a70557f91e464e8cd801838b051a3f32999a22148fb5631ae49. 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/QZTV32565378.