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 0x3e3cc780eb88ae3f158c48a4e6456b480746307ac4ceb85d7b747a3becb0bbd1. 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/29851c3d-eb25-4555-8766-f2c846262fd9.json and https://artists.proofprofile.net/proofs/artist/29851c3d-eb25-4555-8766-f2c846262fd9.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 0x953c0c2cde91d45a1f0ed4b3cccbaa84386e82018f65bf5f3879a74a4dc12eb8. 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/QZES52455622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04257fe51dc8087ce8a94a3d50e667b8070b9734c1417693d07970773b536789. 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/QZMEM2431076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fd43c48ef820f96b158ccaf4843a43ae290388c249b8003313967d69af911c. 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/QZMEM2431077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d3ba2fad580610bfc317e810abc2084e62faf71371d38dcaea27cdb08130c5. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZWFL2346877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb05d06882a91b2d8f443f389f76b2619370d8df107c3939d633f49d02fb084. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEM2431084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466b8391636e59450d29ad8be637316c08d70aff41042e2d705cc4e04cb650a8. 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/QZTBE2350630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bf79478595ae966c59697e98d80a62ddd820344e92e6975022a92aeed5f987. 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/QZHN52270510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd864184d7ec4f2de773a45fcfa90c30cc1818047a509ab7e778e664e1293c550. 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/QZHN52270511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda9b494d0cdc3cff71b40b6e9acdf7305b0bfbc2505eef77c90cf5d416f1cea. 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/QZES92298359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4040d5f46f0e6fdb9f4cf763011ae8eb147f71f7f00d72bd86065a9a87468403. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN52270512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f91fd3cf2645312ab78b5e6b2fc89bbb184bcb8a40f76e44f88798f06b7536. 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/QZHN52270513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df1e7ef65ca8210fdf34d40b3d70beeb3c6758bdf07b6656587b8dd100538e9. 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/QZHN52270514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de894645d2375b63694e2e41943bc598d307315478378d9dea822e0d6bb9d0. 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/QZHN52270524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953c0c2cde91d45a1f0ed4b3cccbaa84386e82018f65bf5f3879a74a4dc12eb8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES52455622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d3ba2fad580610bfc317e810abc2084e62faf71371d38dcaea27cdb08130c5. 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/QZWFL2346877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466b8391636e59450d29ad8be637316c08d70aff41042e2d705cc4e04cb650a8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTBE2350630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4104bf3fb4e0592bfdb6dd42cfceff3ad78f43a3cf2565bf8815be3012d2678d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZQAY2320272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb583ee8e3216563801c83cb338a3181ec0ef32a5a7737cce3ec98e3a16bb4d59. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYX2336019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85268d3d5ec81ef8e3c2cec97d0423c3cfd0ef92f9783b65474322b75ecc19d2. 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/QZTAX2285616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e28a06c5d5c1b5a291d1a782e76c5104ddcfbe6ad4892b7291e430c7653f795. 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/QZDA52280498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce3053e1ac7a21b42b9b21ea239ebacc96c8ad0630db04a093c9412579af08d. 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/QZFYX2233191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7287c830de1ffbb1935bd3873004d47938c0cfdcc6a7368f0a09bdebf765ac97. 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/QZK6P2168013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16909e73e09f6f433d04ff1e51a27ef7c1e53bd9d5341c5a2b535f9914f9e598. 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/QZHN92150208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e975e166071433b58b68a0443e1c0ab900fdeb3990c564601b13e2f289f5706. 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/QZHN62111196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b006702952ba84b0af26a72c1c7323c3e098837b9a64fad909e9934a20040e1. 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/QZPLS2010089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb541108f5a48b0c10fc07959ac1ca2ce222f338949d82fed85d52fc31d5117. 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/QZMER2081480.