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 0x2894120ae46d26796844d0e0067a30ba8001e03916bf347d7966fa84011cb140. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/230f9a81-421c-4d78-96dd-1afce2b78091.json and https://artists.proofprofile.net/proofs/artist/230f9a81-421c-4d78-96dd-1afce2b78091.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 0x88654bfd576b807b787ca4521284e837b2a957695be623e5d36d7486ff276ffb. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:09Z), 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/QZMEP2011030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef026e5299596613d9e1c7f25476e8da85d2b2fa7c760c47888db1b3e84f5f69. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ52076723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b07f6e5b322c02070a1152862961313b96d014bb3763aa3987d544ef5801a40. 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/QZK6H2108885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32703f1391d75082232d6d4120c060a97df931c5502b09b443e5c1f24190100. 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/QZTB62232720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6f76713d187dd99a6f8bccdd823252f4e3580eaa6463dc19954e49675c128b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA51930075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8408568d56d02d340730b9164a098770126cd61dc577de49aee697df134ce19d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6Q1909933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c636789322dc5ead6d863fb3b5ae091b54ff6faf4851fde2dd53d2c294bbcef. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFE2461294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c7ae22bbe7a5de4e1c46ae3b3c8b34dcde8b9c817bd9ca579270918f603eb6. 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/QZWFF2397293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eb4fd0290a47762a3cd723aed1a34d02aca611d5bf8f8bcfa7c0245ad9075c. 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/QZK6G2119503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4087556e160b21f25f131bb1470e634a4c4f532320f36e2614b8d862bdc034d0. 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/QZHN82094693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc20eea77fa40f7602cc9ac8a91696d2d76fd9ad38d24e0a72da605105133215. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:33:11Z), 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/QZTBE2315553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47935b4b2c091c532ea444a510342b5f9fd5a5aea04f6f9b4cb769ece1a151e4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:24Z), 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/QZDA61918086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2166a00cb238e08b5409d5365179e69efd4d4f3677a31024cc3a7e534cee0519. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZES91881456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8351992f3db2ab2b030b5f3cddbfa6fa7d2899908ecdcc18606e396d419666. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6L2018720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb547c637d79c0e52a4eadfbccf932054f39f0050ee8628f707cbfed2dd293c. 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/QZFZ32354462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0762d35ed69393f6423c59f2f7c926761361f60f5f082694e86644b911fe5814. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFG2323400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b213a5da678cde9755cacfeb6007768c0bae4a7156a7eb4a42f14046262af1. 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/QZK6Q1955072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76cb9138a8c5748997996a60980ba3fda08a1585ccb5589eaa0f845b0c4f9bb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6L2080640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d9ac1c3a0e6273173d69894a1e3f0c183defce22753edcdfeb1399453f7886. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWZ2186595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff894a40c4660d4a75fb3b9313aecf7041b10a1c6e41ed925e3ebeea9353488. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ61985309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61443f9794bd3829677ae53e91b370e78293509f16a84e2d0559760e91e0c909. 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/QZK6K2076605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b33a9de2aacca32703e7585a4068a9e5aa954580a4e679b23384e06704f9e3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ4JJ1809825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5be720f59da9bfebe52f54897a3ec6c6dbc196a126e2d24db66ad393f6b811a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6K2420985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58b8e08063c54b4a20c01868c6714fcb00cf5e13cab5624cb405d15a790a263. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYY2379337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0778c41cbe5046ff1fce50b4bfb4e2056144a5ad951ecefc682b4068d08f3b1e. 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/QZRP42311080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de0ad89e533e4541a68b6202612b5c4018bf7756dba09b379640b34bce70e03. 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/QZ8LD1923554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b40271e8f833eaf94d5236ea83b448e1cf6709e46339f863c264b37b6513002. 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/QZES82361204.