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 0xf424ff72fe70452cb4609db5329b2877a6ada2664d40e39e25a34d03847f1802. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/515288b9-dc31-41f5-be0b-ab6cca78e306.json and https://artists.proofprofile.net/proofs/artist/515288b9-dc31-41f5-be0b-ab6cca78e306.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 0xc1f8453f41e04f191dc5f58542f07f93fd8328ff52d1b5b95793f9d5b501263b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZJG52478664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76efb1a764056c506271bc8fe4c26a648d6fa8acfbc7c38ebb82b77c85df7f4. 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/QZJG52478665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81caecaa2de43d18a412362c87fd2d48b60ec8676e48d749e660a9ec986d904d. 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/QZJG52478666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8bcd0d31aa3b5f0b8743a5afa5669ceda691680713e3d13c7be1b7694efc9d. 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/QZJG52478668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b16d420a1e97fae62ae3052cdfb85348f803e6226b066bc1ba34fdf364ecb8. 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/QZJG52478670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3bd0a901da5148d4d7dcc24e8739dca5904c8c236e76303c46b97426566f3c. 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/QZJG52478671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907407dbd1a1b151ae0403f112d395d09a4f583f8ab7634f3b0e99a10219ca39. 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/QZJG52478673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e39abb06bdd1e8ef2eaaba0cc192a0ec8760d726552bb2561668998748f5569. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZJG52478677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8b605d3f88b924336758c18b8119869a655f757b88950dace4ae00f0a1ec2b. 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/QZL382485174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fffac2ce3234d26caf1d2733555c3b67e1dd910642ff805235ed5b8dad19dbe. 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/QZLL92421789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87782ca5946c720b5aea9b29cbce6372f8da3ed71e5e90a3eab680bf6feaa43d. 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/QZLL92421790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0505cfb5c65e4e43b51adb2f2c06043b9252b21545fe2f76efac7663bd341290. 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/QZLL92421794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1096e4f7792290093200f2bd8b1b39041692aa87e4c512482ba4fc3536fea82. 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/QZLL92421795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8912f85307f531b47f1fb60d0071de9d1de750b728af14eece29d553b1c5d2. 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/QZLL92421796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1829ff57b0da4efed2ac450b9bc0e11ffa1de04c905a5332b7a06a3d1c693234. 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/QZNMT2464034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22caf781f1fd2d2171c33e2169159bd5f4978ddb99eab28c2a60db29f70de6de. 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/QZNMT2464035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8155091108b6bebe019dd66369fd5ae75ba20709cc39fe436466f17c952c2e64. 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/QZNMT2464038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e0eb750d08fc8508999a88d9c707658f5d088cdf48829caa2519ddef088072. 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/QZNMT2464040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad84e96bf9d658f9ef53322e897b07669661542ab560e49e9e847fd0507f026. 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/QZNMT2464042.