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 0xb639f4e07a9360bc36dff11fab461b16c833f970af3e3f0ea5a4a3be98b26779. 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/e3e105ac-0ae4-4101-9180-6d1fae15ecd8.json and https://artists.proofprofile.net/proofs/artist/e3e105ac-0ae4-4101-9180-6d1fae15ecd8.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 0xa115bac1f8e1fbb60880f7373e86a4fb959af30305e7fc576b8e6cd0dae9b87b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZAKB2159747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04bec10335d8a548b0972b6d8536eaeb3553bafdc79bb022500d88d89f2d5cb. 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/QZAKB2159748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aea03b5878e6f2264429c11e979bcb6c860fe6a505ef4c108863fe8287a4f78. 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/QZAKB2159750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca4ba989f3f29542d61763448eebe4b237fab0bb5aeee9c66b297765dfc71cc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZAKB2159751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd9896e5d42c3987599881bb4f2c1c7e2547d754bec0396cd4d8e67bc36e9a8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZAKB2159753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb4cdae6ed4be64d8aeaf3a3929dfc2fb80193882552bc0615ec0414ed67f80. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZAKB2159754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77074c77af84fb9e13c4a2e970f6c3df6251e1ebee28bc6ec9f6ed0a0ab5ca85. 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/QZAKB2159760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b81d2c111f2fb3e7e2078145f02949c28043a2f672a35c2cbce9b94025f2626. 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/QZAKB2159761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e41346606dcedd7df72b1502fd9af0a94f585f9e9f3fd4d3217e3a448db4d86. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:03:10Z), 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/QZAKB2159767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe950af110dd92d4c192017e683fe08472ea4335cb21bd2da6939b346d31edb72. 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/QZAKB2159772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5357265513e73b4bef6e978b56cee0c83da3c3f4d9ee7b83f00df804d079d8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZAKB2159773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7755008d061c467bba192c7b8eb8895967f0b148b78127ccf64b63af10cc630. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZAKB2159775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074d5ceca5b4d5aad25e0e7dce7c5cfdc6494ce686fc07e06e418ab5dd71ffdd. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZAKB2159776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d97f1baff33527d678151ed470183fa3ba8489e128b38169527fd5b43641df. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZAKB2159780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36c667be138c076e0f072d9eb2c5f47874f816f972a03f8d4a0676ac63fd202. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:59:17Z), 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/QZAKB2159783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab46e19636591ca90a6093964eef32eeceba92c94fc0fe12bacc3a819c52c6c1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZAKB2159785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6baf205d0b58ed57f8c1609fefc3ed9024ad1edac69473f46e651323963ee8. 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/QZAKB2159786.
ROFU - Round 1 (Semi-Final 1) (Yukke MoriMori)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79bebd2a115a24753fe29dcfb01e2b719cca8c240ee58f1bcdde521338f6c2a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZYD92402214.
ROFU - Round 2 (Semi-Final 1) (My grandma is Sachiko)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818749d2f26036566679a38460770b520a35686988d8b6e1762920a2b3ae70e1. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:10:26Z), 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/QZYD92402213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e677857ac42a1e9caf8875d88fa38497e2dd3b69d70d7b149f2d1e09df67b0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:23Z), 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/QZYD92402198.
ROFU - Round 1 (Small Final) (Green Bag)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130a49f564519d87028dc8de4ef5d9175da3dc273688958f799ac61c3f0ea524. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:27:46Z), 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/QZYD92402200.
ROFU - Round 2 (Small Final) (People People)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20e387bca7ee12d93e3c2e853971a8a43e3c8362ce24184e5a3db867e45a3b2. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:35Z), 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/QZYD92402205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e42138dfceb0b777f4b58918d7aef79ca12352aef514474d5e9ae5d1cbaa5e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZYD92402207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2727db5bc0c6340e08c0e75fc830dec4dae31d68fcc18039585ae45708b292ef. 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/QZYD92402206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f59021fdb69c529fd60667c48ceba0f5815b1dfc58c6b5a751a43622a216ea. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZYD92402177.