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 0x35cd66bd9ddb71d786e2101ce4d9db41fab05c50df0e3a3a2589d00d192451a7. 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/51a8f7c5-ea9e-4256-99b0-ccf6e56259eb.json and https://artists.proofprofile.net/proofs/artist/51a8f7c5-ea9e-4256-99b0-ccf6e56259eb.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 0x006c17111c953a2a19ff4a31969d11006a728e4ffa40dc3a43b4260218539b6e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZMHL2069860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f3323fe1de61d6445cb3531edaa26e7b4c9aa8e25ef87f4751e12a32767a00. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CBEFB2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e774b77c3f1cd8317a91482e6e3e3e55194f1432f4ce14102406bc12ee062e. 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/CH7812528446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434fda08a3827c04091351437608d29e98e66cc508c37a66c7e4db01beab77d0. 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/TCAJY2513914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fde06349ec4681bc89f3bc792af71f6707409438fe30877857d8cc0be7f1095. 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/GBKQU2545971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc6f51a672d3a836dc8d12b1edc400ed92aa625f93842f36fbb402c1889afce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAJW2592996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb17d13373f3893f9b589a1c4adf8bae1669ab9f5012b5ee626f45f0c7f5564. 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/GBKQU2533443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5027da93f9068f6ac0cf86284d58c30a4071365f42cfee893bafaf3bf5d1bd96. 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/TCAJQ2556453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca472c33430128e38346cc99c001e250c52048ba42b888d8dfbd0146b356376. 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/GBKQU2546248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd41a466eb0c674645e4a8ed9f459980cacbf2e385398165e24e761d92018bf. 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/SE6XY2553403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ba4d684f795b856fd6a17a518b394b817f8975908b0122a36f2d2fed691657. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAJR2527900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc65452a85fc1612ca4174d9b50b6702da64b44571c2aa2b33b504a456648c19. 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/TCAJQ2519364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95160ec4539038bffcf45b558e3e9e6cc82718d30e9deca627c9395767e77665. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6XY2544802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2147479bdc54d518d7665c8b8cb9f62a2fce142773ae30c193c84b41577abe. 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/GBKQU2530565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a289a03b9c74f272a18946109e2f9e212f7a94cb97a691a19637c7af5444621. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAJP2530759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f08ea145d370244a5abbb63c6a66d59b972b40618a8fd3c3c5cf59a3508b43e. 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/GB8KE2506043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4564e1b83b217632d6fbda39269bfbb9412ea6aa5f087871b90283678ea84f50. 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/GB8KE2502485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdca4be657c33478d90e16d03cbd56f1838af1bd2cdf1c3da52ba04695346c2. 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/DEH742504211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d460719973549d40057af019abdecfba6da85a71ec6f63d75b38d6f4d2bb1c. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZZEB2416904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9fe792c7fb93f628fbeebf78a141aa00cd1c26ee9f125794a71c48120940f6. 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/GB8KE2426429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e974b0e720dc4c93f5e340da24936b099a92a21ca9ec1b7c63e35bc2fd3dfb. 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/GX38U2490720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0d9b966e081e84fd0940e1181ae2b184211d73b6f70869a230c3daa02d76e3. 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/DEH742415378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1d68e6d6cb66f57b129464f016898156851fef46eab702c72644b9663d82e4. 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/GX8KD2473641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddb9d9090095d9e08ef669df69928b2e7963c7526315aa0b10d043d3cd71bb5. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QZVEM2393909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c90015c2d115e7d926e8eacc7e346c3b7ada0cbd4f73e4f86fef8cae84bb15c. 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/NL9EM2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2e27ef137490918296021b1951c1ab398efee57797953edda6e4a6a9c2303e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZVEM2386731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79d3b42b3cfd5e45e43dc2f7cad0e62ced8d9373741c71c2cdd72d7c7e6946a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PT1KG2304707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf719a7c4b0b97582cc998c127aa9b5df5371bef1cacdccb02bd51525f68e1c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UADZ32110088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdad79d1205e0866f6902fa12554d3d21075fe7e721a0795dd8747cce15d93eb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTV32416112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ca03f4be419770945b5112478ca94146487a5767bc74dc60790522e1206db5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZWV32456327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3a66a3019ea0a1264d52eaad987a199830cfad821873a2a168df189c103454. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR96X2563242.