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 0x7c55f7725ec513503671958f2df4373b5f066cb750bd2277815695098d730df6. 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/72b6102a-72dc-4240-b7b3-df96de263c8e.json and https://artists.proofprofile.net/proofs/artist/72b6102a-72dc-4240-b7b3-df96de263c8e.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 0xe1ece392ab08276d5700e884eb0357cf6f3bb22b756c10cbe62adc996b0d0072. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DEZC62127874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ba08fa958c0cff42f5b8aacabcfa63f668bcacd0b8931cde3cd3873b863569. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEZC62337634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efc49bfb6120eaa63e522cac7f1792c36caebfd95ff3a2cea0c31ac3b931685. 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/QZTB62354679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95757afcbe7d3d1d15276a1227dbed58daf9790a3c14846e8e1f34ede897422. 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/GBLV62317203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2202799977dba4b2584b217a4ff2b66bd6fcac5812be18859646546e16499ca. 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/US3DF2400426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7b50cca4fad7d3304bbc8a20ad0beb7877e1a359e11b7b9b92d2c41a9094a5. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/GBLV62317178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbbde3fca6e9218a2d50c3fa33847698fb20e6e2d9ba091fbe4714c0da9f4bd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:50:19Z), 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/UKZGC2409206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cffadcbd6c856df85a1b2ee45fd1f459aef1c13a33bb04f3e582ed19c4c1014. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/UKZGC2409208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e857f1ebc43916a565f9378901e1c02b7c8e8429dde42b70f58e197a6c48fc7. 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/UKZGC2410168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8bf6cc9729d9c909ed659901f9da4a6f284dbbf850d552824cdd79cf3cdd2e. 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/SE6XY2344803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73ac0512dbd5728bfb7e226d1e317b6733483b070c126497de87aca1cc7365d. 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/USLD91741925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183de3749db65a616efe5e37f20a92acb8bebee863a3fd7ab911e574c4b23807. 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/US3DF2414787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60a393b2985225e2d8fc72bcc58e4a003ef32ac9fbe5e05780e907448a47f34. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMF2325835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bb84de1068c5b9db681f6422878f26edfc475cb9cdcc50359f7a4789a0963e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNWT2248624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44869f54d5cf2af86f909ca034f7987c55718a3a9ac53a5c49c9b299cc86b26. 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/QZWFH2343734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985b23d891fc4887738bfb715b90cffe698a8d56db3e2bec66e842de88f0f352. 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/QZFYZ2596000.