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 0x939061d71399f71cde74c8908e08fff0db7714c775e4818bd6580dd049c7ceb1. 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/823cec35-3482-469c-a36e-eb99a22b637a.json and https://artists.proofprofile.net/proofs/artist/823cec35-3482-469c-a36e-eb99a22b637a.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 0x9c78c521bc610b08158ef60137a51968f5c5705a74ba09331e6cad8236e1236e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ32343450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17774dc4f9c10d91a0db3d93eb9635f9bdb100903f3eab82208de6d0fde48a4b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ32343455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de27c15b177bb119bdb8f6b9abab7e6f132f8f96c1f68885a099da7cd85f0ca. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:03:30Z), 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/QZFZ42374808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf123b20879826b68c6a1b8b7e2bed5a5c3c33844260f305fc2ce87b9ded56107. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZFZ32343453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e97e270dfacc6265395cd513e38f4648a64ecceaf2f737a39aa43cc645c6c43. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:04:21Z), 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/QZK6H2397435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fc9884ec613974107b9d9058901425513c3caa223b525ade98f64f2cb53bcc. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZES62312249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d35887fb4b10faae6942b81819c7d475185f66189e4061659885c37972c7200. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:21:36Z), 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/QZES92343723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103554cdba8576d7a7d5cb5f6b6ca0c6017cc061c8879b26d3810cafba790d2d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6H2397434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be7c128574e5e14ae70d8ee2aad901fae1c05adc61477886b02dc7810f00050. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/QZK6H2395576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26649fe3e9d185187b2beab6ed153a815ac9fc680bf05a2aaea7126afe3a4d6e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:54:11Z), 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/QZHN62383750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca632fc1417592ff3d764429c7bee3c4f8dbf6af37940e22fa7ca4dfc2dc3255. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:50:43Z), 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/QZK6H2397438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef9f5e1f5b31ffd1db5cd73fd6a77c9c0d007104b519a529e5c3a9428aa8c6c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:28Z), 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/QZK6H2397432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0a5366965d86a5b15b53d03e02bfb861cf75144d7c178bce1744fe0a88e015. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6H2397437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eea929117543abaee1c646ad23de413bb52ea0c6c4d0032a722517a01f0ebf7. 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/QZTB62347766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ed7189e79910f35526493a4035b7a0571174489185c625737e0f90b086bcee. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T23:03:15Z), 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/QZTB62347767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac90d1cdc9e8fbb40e00284e6d0e8ea8b051bb3e7675d0957d0273744144434e. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZTB62347768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e0cd450e2e3a4c66190377fad9bf65735069c816bd7433245c14ab3e160f4d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE57V2507462.