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 0x6592a1bb6dd652ecda578aa9aeb5c00a4f5950976939c8bd57711a53671eab8d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ac03269-e406-4cd4-a560-a29372f4ccf0.json and https://artists.proofprofile.net/proofs/artist/9ac03269-e406-4cd4-a560-a29372f4ccf0.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 0xf0bf276090ee60183edaee7ea348408ab626c81f4a98413a2687ccb07d351f50. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:50Z), 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/USUYG1442344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bf276090ee60183edaee7ea348408ab626c81f4a98413a2687ccb07d351f50. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:56:07Z), 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/USUYG1442344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f793a16bbe44f1d0dd08ce29abf574c7701e0cc6ef75d03e77368935ecbddd. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:57:56Z), 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/USUYG1442345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f793a16bbe44f1d0dd08ce29abf574c7701e0cc6ef75d03e77368935ecbddd. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:17Z), 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/USUYG1442345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454e29c1e0e392bbca3433a64b3945c48f57fa4f909d966cc06db0361a9ce1ef. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USUYG1442125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454e29c1e0e392bbca3433a64b3945c48f57fa4f909d966cc06db0361a9ce1ef. 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/USUYG1442125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ac57ac2de057481928861e09edc4e36a47813b5fd2ada58e47cae12c2a81dc. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USUYG1442343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ac57ac2de057481928861e09edc4e36a47813b5fd2ada58e47cae12c2a81dc. 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/USUYG1442343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c3fd55ab67aa0c1ad9b090150f1f14d52a815a66b345595e283701a7b608f3. 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/USUYG1442126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ec3024e002809a68dfdae8d258343553631bfd454d0ef891893ea707584f48. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUYG1487630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a20a9c0d5b4007f6340d5bce377ffd229401db8c85774eb3b59079d2435a83. 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/USUYG1484462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f907cfef28c1fe039d5970dcf8f7d751966107bc46ab9d95f292e4ebad6a78. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:32:57Z), 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/QZMEQ2425833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f907cfef28c1fe039d5970dcf8f7d751966107bc46ab9d95f292e4ebad6a78. 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/QZMEQ2425833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e8b7941f88d5ad7feaf3b65408d28d0264d653fb5474261c853cb3bc2f3407. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAT2596948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f98a286abfa78187fa96f11b3ce37996278256aa9dcc9ee07fdd0de0af999d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB72548975.