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 0x54d1e645f1edde078be6ce3922de44fd9045eee8289dfb7a3297126985f33dc2. 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/74427271-c3e2-436c-ba04-97f1dc39dd14.json and https://artists.proofprofile.net/proofs/artist/74427271-c3e2-436c-ba04-97f1dc39dd14.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 0x4fa871a09bda57c7c575e82fff2d3008a205a2409a6eed35ea966545d86973cb. 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/QZB4J1866411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5633db19b6e08c6ea397da54841c3fb0746e82956ce7f892ede5b9655527e9d0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZB4J1866412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6aa9dd00ab5e828496e4da78c42ba1db8de88f592cfed08092ab0681f68edd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZB4J1866413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e3477393cb87871c3744884eba3b414514912931b2c98936e90b96d4dfd8c6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZB4J1866414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b051f430c3ca9e54b840275aeda990ee13e5b91f6afdf2996b91d4c4f11329b. 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/QZB4J1866415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810bd2f0608cadadc2e8cff56291253a39f1f845fdcaba2fc3894ac8f474bb5f. 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/QZB4J1866416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719b2a74277fddfbc8f471e25d90f1fa9825fc3dafe499121121adf14e78af74. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZB4J1866418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e48b4ca3b39d9ba63a4216649b2b2f6976414130ee0582cf4f1a9dd7f56c9a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZB4J1866421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98b9b78a7c83ccccc9b51e00598227d90951feae5e423e8632e0dde89237808. 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/QMXZD1100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55bf4e00f8d031ebda0d4962fa2b6ef77bbb89356308311daf49f3805a5fe43. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMXZD1100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331c352333514821b6591a5c68b2772a0996f45cf102d2b0f51edc1d055c16f2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMXZD1100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c839076a996e0b2eeebaf3a2e87113302482e8ebd5824fc235194f8eb4484fc. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QMXZD1100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3265f872089b4495096f4d3bb4b5a8a821a377883e7cfa453941f0d39a489fc7. 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/QMXZD1100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b010b28a727967565a6f7c5a6d889d5fbe7ca3a8e1e4a0e9eb9fb28e685ed8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMXZD1100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce124899d9781e1717df743db33b1e46daaaff218f750b599124a5a23a7d4f7. 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/QMXZD1100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd383d1225e69e5c861ce679f0a684148cd23edd4552b012e077659bad8cb2977. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMXZD1100127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802cf32cbfafaddf6b4d4bff1fc2aa3e0b1656ba1592f224a3f7a610c312d623. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMXZD1100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f7d8056e8a19124531b203aadd8f212e559c00cab6eda7dab8c854c9c2d4e1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMXZD1100106.
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 0xfb253dcad89d1782ec66a8ed7a2e10411825d5ef82c445a3952465c5f301aeec. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QMXZD1100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4f9d5d8e6930c336f978805b02232dca340b105894e2fac81ea4b2d723b917. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMXZD1100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9634ddadad32e36f96b999c9e38275a925926f4a1c113c6d01b56fc969a5271c. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QMXZD1100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8fc38c21835ee4b733b82184d061bc6206039e3707deaa2d8c26a5b6cecbb7. 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/QMXZD1100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ba952c69c3c7c507ba12932162c00e96b559695d3ff57d8f234962c7ea92ca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMXZD1100308.