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 0x9ad73097af90d67a31e16a149b7a3fb3d64d95ba0ab410a0619995c5c1c1d59f. 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/63cf96c4-3e41-47cb-b95d-84cf6c971405.json and https://artists.proofprofile.net/proofs/artist/63cf96c4-3e41-47cb-b95d-84cf6c971405.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 0xc2f6b03ef6635945f64f0b799f23b3094339fbf179a722f1e38d2038e91ebba0. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/ISV442275501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7101fd67befae71f842a46177d3b0d85689978eb271b6ef3a999adbc403a99. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ISV982235001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd106f39963f5487790fbe6e7c4fabeeda199aa2bbaa223bfeacc511fcee3381a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ISV982235101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9ad81113e1033fcdfc0a26ab16dae7e04bc49f7d63a8f4904d9a1eaaaabbc0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:04:01Z), 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/ISV442288201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8c61ee53d1e384597f7edcc5bea7094782aa36657788f90b8d4f9d70dd38c4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ISV982235201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f1f4ee8a1446feca1dbbc4b576fddce034b4df0d7fe596a4f01c2d7b952b58. 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/QM6P42435957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7836136431efbc9a7ca32421f24ad8f77c9ace2a82d03674aa06d7220bc3f447. 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/QMBZ92425404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2118f46291894aa20f1a5c13b04cbcd340aabf3a14b77cf80a76aac672ce2d8. 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/QMBZ92427102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9d3d93fe1482c5558221551029e21ec9a0b653157e25baadb92731c5d19f8c. 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/QM4TW2479081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdc79f283801b068817be28709c01c329ad84e2d384c60f5d69109cc9d4151b. 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/QMBZ92425505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2799f15120890dec60de45fd26b7576d1b752b717edb4bb218f133d1c5c98e1f. 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/QMBZ92425533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0de171c3d5f675401d3dced029e936ac80dd8d200847dc9075f2529b61de7c. 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/ISV982375301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5e037766b5dea1b7ae351f11194aae9dc320849c24887ae2e2479305866e04. 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/QMBZ92427057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed68b05d5cb57e4e81aaf1567d8a1e3be18e079b96e5742c17422d2a302431b. 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/QMBZ92427060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf3079daf4cde9895c5a79f99649a47ff15158695734b02b19eb9c56a1a236f. 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/QM6N22426911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e90243b989574517c47d13344e7615242cacfedb30ae05621b156dd85cb26f. 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/QMBZ92427105.