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 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 0x91a13c86be1587f30fcfb10749188cf5c22652a4bd302f96c16f325da8703793. 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/a9299ec6-0871-4d7f-8991-99197168325a.json and https://artists.proofprofile.net/proofs/artist/a9299ec6-0871-4d7f-8991-99197168325a.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 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 0x6933abe748f1df504d0625be79b320003dca7d0f7af0268b724f74c6ca30e00c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZES91814220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510b89b528e0e6f8f10297ea3dfb0bc7e2273be2207a50c0bd4821ab2293bd4b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES91815606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8328d6af546298087548ddab7df8ceaf8804b13fc9a20c8756058d1bdcddb7. 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/QZES91886113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6df1a23ba44f64cef59d99b3813fcbcf3d3cfca88e28b3f6dbddd6b25d11a9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USLGZ2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c1eba114a21519e017687fb845cfd778b320377809dfd5c820c587960bb07b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USUYG1356605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9146394576477c032640f7c59fa6dec824760e18aa352e9c7442c1bb23206568. 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/USUYG1369600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c84ceeed7be5122396ac73eaf146ac56af80c49ba4a6327abefffff7b681664. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USUYG1431467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0f3ab2654e3593a04b7f83a574d2e8bbb95fa730ea7c5d48a3aa3317444631. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USUYG1426641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0b23a7ddd4191719cde90a1a3952836d5e43b1f66cd643b7f19cc90fb0e524. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USUYG1431470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b1929d9fe721d758bbb21d637ce7e3a8a35ab307fcff32ba9bdb00d7de0c0e. 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/USUYG1431474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7befdbdfc38d0d672e5c9935b6c962d487b2da994791aabcb1da0f33baeb81. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USUYG1402667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e34230f0a9a89ad9529daf06ef26d1cf3ebded24962b7d1a89840093dded40. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ22393362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8083597ad382c5c46f821a66de834dce3779681bfbd133fe69cc110b803e2c80. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZHN82386359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2afdf76dfe20ddc8e8f047e64a1f0bd4815acf2b7805cbfa2ed25577edb64ee. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHNA2346216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea3cdcc3e22efe75baf1ee757e113a273a955d4bcb5eee3e4c0950d2138a2a1. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZHNC2354226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c358496d3ec18e1e89d14bce70b69ca3e471d773541d60b53788a8d68102bb. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/SGB502392266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2046b626d0c17b4fb33375e6e419bfe187de6e788c212a7f68c70aa4ee679380. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZDA62472344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21feba521d29f34ecec3064111a339cf651a83576e30c38279d46a428f13c9b. 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/QZHN72415959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adb21976759af83623524591902962ebdf363aafb5b0988959ea6654a6b959b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SGB502398699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5043c801ccb3aba731c20b7021e360792a8d8a1938864b5efa57d7d6149ca1d7. 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/QZTAX2445666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2484740375ef33d1d41ae2ebfbd7303c8947958f6f07a10a8d3ba124bb0c2c04. 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/QZTB72468043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71553bb21ac3e99a65b8c0fefea25ca28e374e5f2d9a05424c7037bdc59dc4f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZTBB2472558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02876e05b49187be6828ecd9a23be35393e7922908b9934d5d7eedc0b22a760. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZTBF2410678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5242e781e96c93fce9483b72f61c721905771c44296c3a951ef016c2d5374a5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AEA3A2301791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994cbb926f80d8e4cefee73b1daeca3172079ef6c4daa4847862d1f004b5a6c9. 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/QZZ762499178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa06be58b3ce349aadbbf85f378fc6e7231d7991d1f066589923c32bd8e28a5. 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/QZES62597066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954903da4d0ffe0353e61a484e00c6491990608ac2fcb22a86c329320a5b60b0. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZES62597067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38b836f1a53c82dd4018fc0bcb06d597ce5735e2227e8db4a6082b043ad471c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA82586337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b64be8caabac5315766a37fdf3fccf49bbd33d7489f2fd061527caf613f64e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUGBT2566119.