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 0x6a94ea706edb03d86756168b0c473c20b4a624e8ca9b84d487629cf6adb2f91c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdfeab1c-f8bf-487c-8c55-5d82a982720e.json and https://artists.proofprofile.net/proofs/artist/cdfeab1c-f8bf-487c-8c55-5d82a982720e.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 0xe1e337065a094fee2893870494fdb55d9193750ad24dc4476b25e61f10220a45. 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/QMBZ91348431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914f9dd40afd9585c4b01abe090a07eb9561315aeebcb3bcebee3c3bb43f36a0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMBZ91348432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f6eb32fb0a2c124200aadd798d90d42d124eb858d6ae76adb2c11ed71243ee. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:40:14Z), 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/QMBZ91348435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608091b2c660f690749a8e1add0eefb7f48aad97c2c747355616628f94c1b199. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USV351397262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a323fb231003b7513aea42f08b40502560e55865476dcd09461421e555ca63. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:45:12Z), 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/QMFME1489316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6f10f9d79eaf056c9dcb8f21ddc90d0f02b920d0b9e45bb162e9469e13b093. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMFME1489321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8d6b7f5eaa1820038ae8c2c391707bd03b6fc6b8cff4c2fc358bbe9eec74db. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QMFME1489324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857548910ec45430ba0aa823631702712512d0d31d8c10d0d06ba1f603c116dc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:00:17Z), 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/QMFME1489072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8e2c89b60d26c8fd5d0ef0e7b3ad0ce9a5a73bd88aa89305119070d6ac65bb. 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/QMFME1489269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b0fb9dc4b5574e9adeeb4aa5aa8257a8b4828b7b6aa59c390ffbac0d259b37. 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/QMFMF1440231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0507c3258157a9bf25bd665afbc6fdb5204ecf11c6d3d91ea261371e25d055d8. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QMFMF1440234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da5e13c0bbf81ef95eb0909938a486fe3abe1988f744f162faf94897fefdb3b. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QMFMG1445155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b895ae12fb69e6b6e064311a817d7a8ccfa5cbe410edde3efce4759e9bb1bc. 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/QMFMG1445157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae7e8895d9212621f8855d40138e071f471c62f1860c2394ddd66ed646bc379. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:38:36Z), 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/USV351403993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74808277e6c036cf4a17da16a1691c60ac99528996b8c5cfc9b1951978e9f008. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USV351401606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff2e04422618d743e03702aee911d55239ebb0981960ef1ca938615f4f3ead5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USV351401608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91db57125cd499f9b4d39a17d8468c6064939bddf637a96e1b59321964554501. 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/USV351401610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eff2341b650affd22d3a1c4e7166a1f2483e18cbb9d87aeca5bcba5ddfa315. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USV351401564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8a0706a814ff2ff8f152e67b28608ca8c3317ca7e4b52cf9c6100b620fc36b. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/USV351401568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34533bf705a2781fcab41948e82a0a6896d570abaf50093246c17658742e7c7f. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:01:42Z), 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/USV351403419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f91a83f70f707dee1439b8d6c29b3e098183bbbfde55d4f7e7a3ac168f4c18. 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/USV351403421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fb58708b6f4d43e5202cf8383f6b4ad8bdd64ee3a252a94bf4447e49ce9ccf. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USV351403422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e821e54759229d876fff3b65588394641d374c0121b29f780a8b5e6dd4df7d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USV351403696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b22a5c87b8f5358ee3afcb4922db39b676fefd6de86339a51bc250b0b8f13b9. 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/USV351403702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb7b8d9a7c41eab3d1520f19ea7b212bfbaf203ea49f944faa09ff3bc478c3c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM6N21460024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9922a33a3606614d3a1768269c84d3b97a9e76f6d7665213de1221eb62287c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:35Z), 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/QM6N21466935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1b32623dea11186d500daaf16824dde755b23d5cf809da8ebfbe6088e272d3. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QM6MZ1519788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9d6977ba31354bd06bbfa5024990a2289b6211643042695fc958403866dd1d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:49:23Z), 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/QM6MZ1519768.