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 0xaeba51ac9fe0baedd235dbd2c5bd9a739e849c2e7b890864c4300fb22d5ac00c. 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/b28985b7-7c6d-4e37-90c6-eabc624581bd.json and https://artists.proofprofile.net/proofs/artist/b28985b7-7c6d-4e37-90c6-eabc624581bd.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 0x68fa8ca14b2f4285446724f9711bb19224654d86fa010b9f919ac44c47b32389. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUYG1398753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e656880afb842ca32381d1c451e4a241a3488b5a3235075f693e1e71928f64. 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/USUYG1333262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656b48528b339ac26c99f0b3ea678617ae6cf4d48d82d866deb369e90cd260ee. 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/USUYG1294689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fa2b7fc3e0c6760f78af8d1f235a710424163dc7ce56455b9e0e99fcbaf586. 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/USUYG1333267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd873d210461b304648c29428e6586250a285cdc3a98f6f93f6892a12520f6f8a. 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/USUYG1333268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b14a1056b67abc7ac2a9f047c4531f8eff6b6954a42e7614695ca955fb4faf. 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/USUYG1333271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ef62c47b8d32d4253bf39cab9777d6110d88d54e1038fe56a4fb30cc6c3214. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUYG1277908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5745a2bcdb7880abea87ca800dee22223366c34593a7ae4999242f6e002143. 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/USUYG1277909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2df9ebf3fa0e3ff0f036a8e14ed7488f1f47978de13d69dd35fba40411e9fc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUYG1277913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa468b1ecea4f1c22ea0f6d08e97c2c2aa8ef6740b7f5048497485af079389d84. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USUYG1277914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bb97ce1dc251bb6624befb1c14e1d194d89bb997f3bd0aacdc0964aea0df87. 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/USUYG1271836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef87094626fa41999ba71c2c5f4ebfbbb21afb951dec53a2e20d37676fb84beb. 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/USUYG1277915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5f6bcfbf0d383d2d27fdfef97d0395dcbf10ccf33553b263cff726be682c6d. 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/QZDA61999117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadb937e3bf1ea13a738a10d6dab1cc73de09d91503949df823654a42d7e664a. 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/QZDA61999118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3262e0d92b1dede59c1061265e0977c80b3e6bf58e0d39cb175bd9ba92d090. 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/QZDA61999120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf542c64da1f4e9ccf9e5debd524c680ce9b186f34c9f88493bc0507260886105. 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/QZDA61999124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad26c438a08a228a7f7f06fead0fe2edc1864b192a70f859dde7437502b202d. 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/QZDA61999125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693d5c687bee9865124b12fd73cb355f32a9583a37869f0a241f591cc733782d. 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/QZNMT2275868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3196b8e849c6867b83f94b8a6ff87c22b7c7ea7b7141d6cadc8cb3786215e8a. 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/QZMWW2280646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba44bac05c19efa4fe759ec5ad13719b39ab72d87c8e5dbe0bee384dfbbb1b4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZJG52237605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656b48528b339ac26c99f0b3ea678617ae6cf4d48d82d866deb369e90cd260ee. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUYG1294689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd226d2c748b01135897a48b69320d9bf5fe1bfcc9991a20d77920c5922eb880a. 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/USUYG1288774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bb97ce1dc251bb6624befb1c14e1d194d89bb997f3bd0aacdc0964aea0df87. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1271836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537f79cdf9080e43cde166fc4ebb76c8edf1692a1b9342a949e7c2967fc0471c. 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/QZFYZ1927183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6eab9826b8f195be5e83cd3a490cdb0c01f976e1d125e36a25788b1ae38ca78. 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/QZ8LD1963716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e96f91929647768e5d9d9fcf8386d686447ba688ff6a589dee339898cbc90b6. 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/QZL382498375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9375fd7f4fe0e26e6475bc80c4b0a18ff0758a53700a3ddfdd3cc3e619f717. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNN32305687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2ef30e3b7e60e648b4edf524a2b6afd65c68f0f0f669ac48b8b73e6553c1bb. 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/USUYG1501180.