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 0xd1823a70ce84899c07b02dc7d035d78535a61dff73c47caecdd986f7b5b4f068. 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/3ef16d08-2b07-410f-b746-116fe2754431.json and https://artists.proofprofile.net/proofs/artist/3ef16d08-2b07-410f-b746-116fe2754431.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 0x9fc2893ddf1e0cc385885bc289c0d678c4064a78463c80440794c783e0d75557. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN82393567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a25f1a8da0962b8e5e0533353da6b3b1db1b84918b5e44db2a342fcd2e642a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:44Z), 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/QZWFP2375670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94175495558f7755ee3a299c33e4c30139a70d1e4c42e7197be09fd8348b26a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:00:38Z), 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/QZWFQ2432008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54450b4dbd5bfe162f1b3e30462f6804e4007587365cb6607fae06469475a45. 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/QZZ7L2453885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b399cf4db71ead4380d815446c8fd693fd103ff54d9e11a10e5a899db482e77. 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/QZZ7N2407876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18eccbeea0759c1a72f535d707a095ace5ab7f1443c25cd3f7235b08ce6386e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFZ62575395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237d552b092a07fe21753172867b6ab7a6667c2e2f0f01f81681a4ed6cec09b2. 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/QZZ7T2511137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707a413a5be235588b1a6523e8449f9b9761649acbcbe31f94380ad68c2d8e61. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7T2511138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3410aa9a4c8075db81d6255948c31283eb8ce676eac24896341648025fca020b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:35:41Z), 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/QZZ7T2511139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531c0b1ef4f0657a18c683ddf7c8404f4af308ed3541231b8fed673df660edd4. 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/QZZ7T2511142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6327d8fad9f78920a0dafeffe2864915f5df0375728c84c49f98bfea46ed56d7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:01:13Z), 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/QZZ7T2511143.