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 0xf91b2e6ae6dae27ddfe336cf723c1a22646a9a6cea4dbc3053fa32c9381de387. 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/69759b37-e1ad-459e-a3a0-08e85753835a.json and https://artists.proofprofile.net/proofs/artist/69759b37-e1ad-459e-a3a0-08e85753835a.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 0x71c0280876534fb3f6ae7cc99fde37aed8f7f77991649ce7320167e4283307a7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:21:10Z), 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/QZK6J2276152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30c2e51d271325d97dd0d08f6c4075fb2fa4abf0a32a18f3aef23bf664fcb2d. 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/QZK6J2277246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7186a32b8838fef631069a4759e70f73741e4f1db7031677fdd4575984149f26. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:14:51Z), 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/QZK6J2277248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48325ac646edf2d42ea0e05fe8488ce1fb9115ce7fef4c60d8a4149189ea901. 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/QZK6J2277249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b2d41b59e89b4aee89e7c8d5cc2be9790257cd29b1324e0162757374ebf232. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6J2277251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302522d8bb17151a61c5c1d10e4ae42e11837bfb65c35a27b61708f06064dae8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB92391303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5062e8b33e1fb1cd136ab5399d8c97245c051087f15b0c0f32eb7de706bd728. 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/QZTBA2360504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b308e10e6272b95b8dbff1084d7c9d810eeb44b0ac9bbf20ed59e075f88cb5c. 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/QZTBA2360502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302522d8bb17151a61c5c1d10e4ae42e11837bfb65c35a27b61708f06064dae8. 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/QZTB92391303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a364ec476331fceaa217a8eae602ad505499e240499d11339001b90cf52c068. 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/QZTBA2360503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5062e8b33e1fb1cd136ab5399d8c97245c051087f15b0c0f32eb7de706bd728. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:49:49Z), 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/QZTBA2360504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28b3db1b32c9a3a8904a277b9c5d07da879a10fe913263f1008e99319a6503b. 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/QZTBA2360508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf130582b0c047445efd994ca5864df0805572d6027bad36425dcd77358716d44. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZTBA2360509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10028e925d2c7d69c221c08da6729cb0aeb6f226e35b7c0a296f7b7e4c99885. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHN82406326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37ca33f88f20cebb03a8ad3db7e449778e8a94945e2f694bd8dbdbe7c3718ce. 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/QZHN82406327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99564f3fe3cc72923a47e0ce304309ea2fb558bb9b3f6808cdc2e35fcc0b6fe4. 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/USY252408272.