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 0xf03af077e9e29d506abe1211f29a691117367ac4beeded45f9167bfcbf7a11e0. 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/a215263f-771a-432b-8a33-e1ba69f7c40f.json and https://artists.proofprofile.net/proofs/artist/a215263f-771a-432b-8a33-e1ba69f7c40f.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 0xe245299b79beca86a032ba30a31f39f1b5ed9b4b64170ec3aa0b14aac4c1a8ab. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCACO1625411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7f002d44169e8396bc601cd205fd64390df0a55a33efcb1b9b7356fa9c356b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCACR1669248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c56932a5ef64990f18db2fb4e4fc125fc6baf9240c9b77c1249637105e1458e. 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/TCADI1755247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5095222342d800e669a501025da58bca0f40591f559b3a658d119ba8362bfc1b. 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/TCAEE1947157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e63094ded3ba43e51df095659e9e1fbe01e56d821876553740ba50d81dd63fa. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZNWS2247405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fea06eb2a544539216f7846ad13ac0872e4eaff473976ce7c32059a4b60fac. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFZ32386044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc8f6ce7d1d1f32ce8ecfc6942b78cf460254c1c5c4913d16503313475540e5. 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/QZDA82389987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d956476ff0982a3c3280c157596f99604985a4f527c8ee683512d0eebb467d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:03Z), 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/QZHN82373561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4060bb11e8b9d7a5b4e6562a941923efa2f8d0a5b0343a9f2f1739062035390. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:23:41Z), 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/QZMEN2383307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67be7fa5b2ecb75252b1aad6e0ad4d58e2af7baacd0df92b5e714330ad54bf9d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAT2344609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd009d67ac8a81315ebce278233caf4a82e66dac6b889b2eded61a05ba7649d2f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:12:34Z), 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/QZTB32359095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefb73db6c48cbad4978a9437bb5ccca4787b90b1c4bd9f9790c14994c53dd60. 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/QZWFJ2393949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4567b1234bb4e7003bf96a55289091ef50652c23088a224cb9e4565659331d9e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFYZ2445168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5aa3462a5a0da285e8d4c3850eb1a775b96ff94e53052d68ad19d50e0c150f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWY2467842.