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 0x0cd3e6ce13390361edf7facfe57b2065c135f1b2cd43137f57c33a957c9a2a31. 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/0305da02-1fe9-4e91-be6d-15d5d29f99a7.json and https://artists.proofprofile.net/proofs/artist/0305da02-1fe9-4e91-be6d-15d5d29f99a7.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 0x3da9a7c89f8fe6775422d82212aa7c4777e5626aa2f6b8285bbda15fea4d06b0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZES52114331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c91a45137ebd9a4a1d7862879537b4e1ac763b28bbcc45fc29da8323e133436. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZTAT2195402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2dadc7d3fde97a4535f1f0314546de92fd0afb39c6f5ea0d9ab32cf32e20fa. 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/QZK6K2267670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704adaaf328a98a1527a3473b4371fffc54788c6055721ef9e3653fa93b0ddd6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6K2267671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd2479665054f50a98b226b940235761822add503363bfa13ba07984ab7a3d9. 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/QZES62316523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bf9d488cafebd53ab2be1e3e6ee2258491733087846eaaf71d4d2104fb9100. 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/QZES62316525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5891f5a84b4c3d571eae79b58f1361fba04b7692d0f8311001c82b58ca71fb7a. 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/QZES62316522.
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 0x2acc127cbbe79e5f0f177bb7cbc7317ff20cfd761fe694e3baaadce08b0376fd. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZES62316524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9975cec89db08804dae422718095220d2e37b44b5a8f2e3f260ba08753bb2f5. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZES62316526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e0e2df13e3f44be21162ea28f9753b1dc9b6f0e9b1588c20af796107b5de19. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZES62316527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57af03483198b86e47ddfebbc1b25691eddf7776492cdf9acf9f95aed17eee39. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHN32472979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0e8ecce5c0e140e1260d69a53c43053a4da14ab9596d044fea843cebb53e71. 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/QZHN32472980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ce2a5b49c455d2b796be5d6175abf205db761ef968361e9729a10be8938e4d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:37:26Z), 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/QZHN32472982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557caa3c394df1b7c51b1820d3002221a94c7a8a032ff51ed9afd6392184dce4. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:42:49Z), 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/QZHN32472985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d13e35e117b4cbc33590caa8850b6778a91bb3b7b4fba3a19c3a6edde15758. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZK6K2438540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9688351bf873c0d2a83743eda2afaa0c8a5c0c6e21bf9455516c9e8c0610c851. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6H2471393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355ae31bc405ee6602625089fe771cca2410d78a62017ba3adf8a255dd50bc76. 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/QZNWU2415974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8812773764bbcbcae208d94267a43feabc3170f87c6a104c986b761896c7bbe. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZWFP2446952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800bf30de8919df471758c4eb0d8d3e596062f2024383276b5f958d2aa04c8a0. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZHNC2584973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa835960099fbe6736e644850f923f6f8e1a4bcc3a556d60bd10cf646a56464b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAZ2520218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb45967e62a09530b8caa9226fc8d80128e6da2fbbc4819389b59cd20cf51ab5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:07Z), 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/QZTAZ2520219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4af4b3d87079de9d73a142e3ee6ca835ee6b49b91b4765c60dd4e3ef546a0ec. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAZ2520220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dffd90ec4015e0f2bf3f6db0698fb6cba44989c7a0f017fcfff830890cb17c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:19Z), 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/QZTAZ2520221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95254f77af80ad938f65b7e68aef5758dc43a99da11150b7ebaadbfded7788f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAZ2520222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b4469e1019edaad307e5fb3ab18836100a81cfb91b999a38c37b787d48fdb6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:20Z), 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/QZTAZ2520223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942a400817960f122991b74ade37449c2866bfc598463bbd23bf459ad937c57f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAZ2520224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb2ccc071a63346a4ffe0f72f71cc3d7959c566e965dd9acf4676b8a69b8efc. 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/QZTAZ2520225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ca41bf509196837339b9d70a1228303ea20ce3616c266f48cfd7b5ba096a44. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAZ2520226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbd5f04b1658072466ee29a5ac91f63c1feeecbcd4d648d4409ecef32552ab6. 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/QZTB42330635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3293e26ad23115e768c2f7c16528c080a648a7d636150be96fe964772756c064. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZWFF2329136.