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 0x6450b88a5227b857b3af8d90e348241a3ebc50570b0331217eda7ca8ea6ec053. 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/bbd525ac-492c-4660-8cd6-cadd29480e73.json and https://artists.proofprofile.net/proofs/artist/bbd525ac-492c-4660-8cd6-cadd29480e73.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 0x64bf4237cfadc9020cfc51d3e8d2b5b112e48b851895faf0d6e0a3a6b8e8aa16. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZWFK2423497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaf660eec5f4c42885fac495eefaed47d9a4aa08b0f17a1899eb77ee5d36e3a. 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/QZWFK2423499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd35e1d1f76845424d0a4e9d6359e7452369ca34c6118196cee692d918792bba. 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/QZWFK2423500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8fe9f6541562856f5e2322c865b815004cf0e4996206af0b53d19e48da089c. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:34:56Z), 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/QZWFK2476212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf887cd3e6686b479d6e040c5f0bcc23e1c6887704d205db84b9c9028baae4c5a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWFK2476213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97548aca4cc764170f10f52f60f6a81124317e0bd23dd9e60e8fb9053fa1ba8. 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/QZWFN2453127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc74599853cbbfeef542c851becf00c57aa54c5fd95f16f718c87dbbbed5f02. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZK6Q2508905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19faa538c2f81f3ad5fffb165476bd519921837b3158ed807ccaa11a0014bfca. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:47:36Z), 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/QZK6Q2508906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb707a514762e321e5c2503dd0be0ad43ff33c303b2541351c2f192b9fe80785. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZK6Q2508907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210ac7eeb1374cc5c11fadca1e29596da8aeffee4688df776f419c40e29ef8d9. 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/QZK6Q2508908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9141586e80c61a95814479fde803e407c6a744aad04fbea577e4081004afef5. 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/QZNWY2591004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e11d092363ff4a38cfc9c3e38c62d06cdf024c97eb3abd895da458645f381b2. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:44:26Z), 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/QZNWY2591005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4a1b858e8c4ae2ce1124e51bbb68cb9117dbe19c7432b0e6c89a2008f4f520. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:56:48Z), 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/QZNWY2591006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bb374e2698e2470fe224f20da7e980d044d042e160f3440a807cd41c613e65. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:29:32Z), 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/QZNWY2591007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9147df983f83a317c50c6468b9f6f5efbc70ccb3db66c2c7ac867f5220a520fe. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:44Z), 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/QZZ772599034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed022e372ff5751c53cf308b7072d0815ed11f472417a1d94525a90953fff8a. 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/QZZ772599035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7f1c951838c9c14dc8f4847a75dcdb9cfc5d030f70bc1966095d1c16062149. 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/QZZ772599036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adecfe0e95798055f7352d78b0fd08352f857de15f4235f57d8fd24ee204162. 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/QZZ772599037.