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 0xc5100e398597408de85a01cec6e667b5b9c461026a31182e0a44681bfcebd15c. 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/9150ff4f-9bab-466e-8b24-09ee4b3f165e.json and https://artists.proofprofile.net/proofs/artist/9150ff4f-9bab-466e-8b24-09ee4b3f165e.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 0xdf84f82e902cf541a45f561c8d85c2c112d041f753160801a2e63a3f1f5ebeb8. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:00:45Z), 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/KRMIM2475974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99184fc4314f1c9d4ed76a39ef0c0133a1eaeb8ca1cf22f3f1d14f892981df55. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/KRMIM2475975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaf5d2ae73fefd0ff05e34c5d1dcad6ea0d65080decee0abe3824da7674b676. 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/KRMIM2475976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4dd7cc7a64444853473bfc0e07ec9fe33909126750a53a7115f4e712216781. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/KRMIM2475979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9774dafd3a4d58f8fb4e57d57a87ff3b99a3ab50261cbb33fee600f9f667c0e. 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/KRMIM2475981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8babb246e6ab6ff8b2d7b947bd1edf8b340eb67b30e62b94b0e97d54883dcdc4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/KRMIM2475982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bc3de0320431d96932f55e4b173208e201c987df7a4f7ce0a6ffe7710d4e58. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:39:55Z), 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/KRMIM2475983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75da3d410a454d73cbbfb19cb170e2fea59d1f5253555482e334f4c7bb59e34e. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/KRMIM2475984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d253225860112c424fae9b96f23bc4fc262e8675b005bef5732a8755912af19. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/KRMIM2475985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677d422afc826786fbec968be3e7d663a5ce238fb3ca28df8f6895a087e8dd9c. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:20:13Z), 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/KRMIM2475986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f09faf5761242df5c06bb59507305b504128f39e2ebe82f7f2cbcd6301a7776. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:49:11Z), 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/KRMIM2475987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9890b15abeefc104d082936060d63debee5a8686d3a784872dce3464c296f6. 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/KRMIM2475988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a7ace95cb6d4a1706502651d0e5871578a08b1b39c861a04510c91a627a4db. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:06:52Z), 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/KRMIM2475989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bab7a2c6b493dfdb262aa6ffe514a78970cae4a4b08c96317267c7a142401ea. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:20:28Z), 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/KRMIM2475990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd25d432b224232bc7e37a02ef265a96157b81d7d268645d2248210518b1bc5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:03:25Z), 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/KRMIM2475991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950b7e05805f944017b3c4dd1deaba86ff3222698316d49584e1a90603fac838. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:47:38Z), 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/KRMIM2475992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbba892b358319c11d963f8a85342988b0fd9183349167f234b51efee545988. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/KRMIM2475993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec314ba188611f3bef55fb39d93c0ccc4e64fd8770acd44c6e53351b76ee632b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/KRMIM2475994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e91700e5f23a8b83fec477f8235dc5f547973dd10e5dd689a40e294e89f7aa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/KRMIM2475995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04ed6d19fac8c0aff9d97d1babcc0f3d68df4d2e8016c8d2b40984010806966. 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/KRMIM2475996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0ebcda16d24bf6222008d7f89a29d18abc95036e03b221773888bedfeb08e8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/KSA002300177.