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 0x14f772855b17331de7f9c6b32e563fcf524380061d6b6a1b30e8eb24679c2260. 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/3cdc3677-ca65-4042-a767-b1f584bda456.json and https://artists.proofprofile.net/proofs/artist/3cdc3677-ca65-4042-a767-b1f584bda456.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 0xbeb7615675aaf8fc60004cb0a0d6e9ad4ce9ccab421f0e69ee5a992e3d6ad916. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA72360750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7187d3d8a76efc59ee2b689faab80f0829bd0834cc5f19e34c8428683574ff70. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES64E2303595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70d19481e680a473448fabbcbae8f09d9e5f0a0bfdbd0cc28e9f2cc75f1dc53. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES64E2303601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9793ab9237f526060e31b631e65419c82ec8d2edc1867805952ba5eb2abb4c. 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/USA2P2240113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63fd7bc08dc750031edcc297336379063490d2d7171b288be7f4220109fe192. 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/ES64E2203046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea3621ed9f76710cb6353bcb64d8b4906c555f7f15d747d6e18e1f1bf6f7d6f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWW2068027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb159634631ae07ab1a2eb490e4ba626cdee3f493344547f981200ccb053d3be7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA72416839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6826d942fb3a9067c26fd4b65948af18093fb0a8159664803149841e62478011. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES64E2201804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0946025f696d22fb7853cd05bfee7ec57596bfa01c54c65b2bc8c4884617f3b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2208210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04daaf5cf794ed6f9cfa4360d70bb00c1171709f2ab5c7789abd65ed14c9d86. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2149471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225f8f7ad221e87f05f3f834acefa3a73dd2fa091f8c0bb0c8007a5b3f7ac92a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFME2163781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c858b8d7cc194ee78344af6c3d31fbfe4abc1e78faf49020b83f69ca8c05ab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ92184155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c3a306c718b69f1340133bd55fcbcc2224995fcec945dc78da79a4872c8c23. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6MZ2198525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9659631029971562952fb50494df23c2f0352cd015fb6e5abe0d94891583a19d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6MZ2198523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cdf145bcb92954695759d3fadf915f3dc8fbb1f7b973a135b02468487a6e76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2189250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff89dba565cbccf95a2bd0d71a0babb897de5042b4324e7653be429d8f029679. 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/QM6MZ2188568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56595d1dd8dd267f9c184bddf6d67bfc409765e94c70398ba1075fe40d9f395. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6MZ2119040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e69cd6255b1db8d988df1ef9c65eb2c35a88b4dac294f850ebc0b5cdee3fe8b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2195153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2a67a6a633ecbc1f814d45596c5644b518e91529dca06a6b2db5942df97700. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2169346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb40ab04e152e288e1a19f9ae8b84211b3280dc7f4df6b0063da474ffc3f28ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN22099186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b6dedd55d3d33619af35d11b5652cbebd466b8fcb790c2d92c73a7381f4b0a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2020324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d77fc3fd6190f0bba5da45ba4cee3516f8ec4ece419f6d018b38b708e5c1f42. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2325554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f02a4e6c9a8e20115fe210b2bda96b8597e104d85d2ac8f8627b54d954aaa10. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2325549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987f60bfb871621f3a0a3448d0f3eb1cface48640951036797e3fddd3a4fb431. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6H2194082.