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 0x79a6a87ac7167a9f8e10e9b37e7d895632ac40f32699aa41df198aa806a9764c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/424ec317-d665-49fe-9942-21efda748896.json and https://artists.proofprofile.net/proofs/artist/424ec317-d665-49fe-9942-21efda748896.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 0x4913dc44f33edaaf1f681b2218d494b371c8d922ae8226922e7e20d5570b4a0c. 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/QZNWZ2446630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b41eace399a1bc5206273402e4dd2110f1c7a2d6542e5314f22a3c754c2f61. 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/QZNWZ2445954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eddde84c6e8a21c26add9d4582106e24c247f6d6b81f709e548cd25209ecce9. 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/QZNWZ2450211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54628549ca4f9e5241dc3b7ce3660218680ff5bee3a54afb0e49029560f257b4. 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/QZNWZ2450212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8e1834a8466db343732cfbeaef502f0d52a6b1b6b81fd0fa380571b3ced128. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZNWZ2450213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ad133f77dd54e8d50a171a259ff1813a17018f0d0b297a99850e999410ee6e. 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/QZK6F2336859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfcc57a13d420d4f199fc5ad42d2fb3aec279e4a206c11b5256c015e2637d4f. 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/QZK6F2336861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193dcb83f8e87909612221a978de11ff5a85008561414be6bd45952f0cbc6867. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6F2336862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cf11aa1fd13438ee161cde647c3f96dcdd6933495fed608d578133315c8bb7. 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/QZK6F2336864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c60d57028e3a46d39923589f5162fe52366f5b903655fbfc0d35d6867f5ccd. 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/QZK6F2336865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0894723b347ff3106267e1e93318e786c72139cd8e72bc1fc8eae66c6e225c58. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6F2336868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8229d10acac706cfbf59017d6300e95070453d456d502c818a9235b2c889d3. 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/QZK6F2336869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4913dc44f33edaaf1f681b2218d494b371c8d922ae8226922e7e20d5570b4a0c. 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/QZNWZ2446630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b41eace399a1bc5206273402e4dd2110f1c7a2d6542e5314f22a3c754c2f61. 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/QZNWZ2445954.