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 0x9d986c90b9a7b132e7c88e43533341f43dee14b8092ea3a58066970834f85635. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8fe09f2-b763-4663-8c58-bdb764db3d84.json and https://artists.proofprofile.net/proofs/artist/f8fe09f2-b763-4663-8c58-bdb764db3d84.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 0x0518d326b420740dccffea3d29a95bcfb37723025d3fdf9476f5282d378d0fcd. 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/QZTPX2355784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502031d835d669d02d64b42114cf217e923b9ee22bd0604c3eeb3fbb2a46f63e. 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/USCGH2416086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28eea9e3ece55ba1ed28cc36a34ae2305d7b0aa693c910a81fd7e361fb4e7a2. 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/USCGH2416087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6558fffd7a8a64bdb6f20c5476f86c4fca4e67437d02fe28c220347f6e34eba. 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/USCGH2416088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23008c3566a80a2f6301295c326548c695aaa0c15e248ed315e3f18773aeb539. 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/USCGH2416092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b84d1785a6e3a89dcf2f9d8f23cee221c8b604a49887aa580621c956d6b1c03. 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/USCGH2416093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe2cb967c269490b588029d3d5b432617aca19cd0ddb4144a5caee501958779. 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/USCGH2416104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfff53db77779ab68a402f668e4fd8f14b2721b293cda28a45593c5a4028b5a. 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/USCGH2416106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5c6b30dcb4892407140a1c22e318f39b1dbcf0a5801ad31693537154f16733. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USCGH2416085.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c9c22a00334d39af98a1ea0e3686442dfd03282ec5b6426b468acb6fb10e26. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USCGH2416090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a52d53d2b4a7ba472c9e2fe77b3eef099770fed709beec33d1ce285561b5991. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGH2416094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f12e94cfdeb9e227e21337919860db8c92b66450699af13d4bacc465524b231. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USCGH2416107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56da5df7c006322c563fdef13e473cb88130ee86177090148f31f5b4859e5719. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH2416115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942bc34691e258be803085e994a8746bfafe60952c8f5984a866bf3cc8c93e39. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZNJY2462675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1abe731cc912225c2de44117e487612fa7ee8c912ae212069282902ee354b1b. 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/QZNJX2474979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb2c100cee1490c8b4c60b99d737490fb22d274162ef223ea9869f5b5e29720. 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/QZNJX2463850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7786afe2dbd4f98a610c9bb212cf35b04ce11f93c7d626b046580437dc5bd74. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNJX2463851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8331b8254b218c91577932d56d98d8226eb35a75adebc1b57346e4201af5d376. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJZ2371216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369edf4982e868789d530cb396a41e136328769e36b7d7be45e4d339a9a62797. 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/QZ5AB2398598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff552abbf21b4d282ebf91e478802f1fc84b9dd8ec1a41d2c5c8a06210506a0. 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/QZW9L2223241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1148a00407eab7aa17ecbb9ddecec17a28dd1bc824de46d01fa5e568e676a4c1. 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/QZGLS2248036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e79f0fbaddf8239bc7f5aebedda2645bd81a29c6041bd12ca243349e8bfedb. 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/QZW9L2499914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfa0a2687cf241190d010f70b31e569b7c5b2c0bf00781a8841ad30443952d3. 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/QZW9L2453572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6973721ac4f9d5378ab2576da358b35772bcdb4412b3b8ad5c078b9c3bce658. 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/QZ5AB2412531.