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 0x28946aa7dcaf3c4c74e6099012ee468145b519d2f6f22d3611e515ca5530985b. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4eca2971-945d-4246-b0a5-b78ff6732ed2.json and https://artists.proofprofile.net/proofs/artist/4eca2971-945d-4246-b0a5-b78ff6732ed2.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 0xde7ac1ce65411defe3aac5ff82d66e431a8765817a3589bad8b1fab0e5204c26. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USDY41822361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e7de6ba6115bf8b2a9fbd91421224667978fde5669f89c325131d805894623. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDY41822364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93936556020aa8ccebf770eeb365a9acf46c576ebf2b1adc6a43a2797b466e7c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDY41822365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef62f87bb8dd2bcb9f083a88bb35dd4f2eeb346cbf59cc9474b2f557dd1b90f4. 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/USDY41822367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e1d256b127f109d2c9891ec0cbfe0281f4bd147c9092afa08ffa42cc1fc562. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USDY41822358.
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 0x5f6f85ede8e70c8a158d9e1507ec3e3c956da14b9b0c2597b1e91e4bb090322a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USDY41822359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2593dae8832e7de20825803b45c77c83f863ed06edb2e31e2a36c2674940d51b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USDY41822360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab705676038897b5aaa363f6dba3459e4af9af78947e07e3fda9d81b21dd1656. 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/USDY41822362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7358874fca9a10e568d197a871b51bd543fba996bd9c1ea16cb794e5139fee. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USDY41822363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d77db6ac7abd90efb5a258724dc020ea5b2fbe8812abef173fcf2478b2b47e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USDY41822366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c3924352dcc9f81a01c68e963f92374567d5f0b06dc035698b234b4fd0c7dc. 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/USHM91666859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25bd497361ab92e5f9a1b1aba6382a6e2273bc721b962941662f1f7e52e4ae0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM91666860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d30a378ce0ecd4e3ba4c7ba0d39d1c5abc6f8f468258c5c379e736f7611c85. 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/USHM91666863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c9a3ee8192856a45646318780175b59726256c9dab8ac967fa800c4987a34d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM91666866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae47efbddb1c3ea92635faa6ba00bb9768a7a42b2312bdb77796d7d03b98c3c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:57:37Z), 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/USHM91666862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed42363e63c9c662eccd1eeca259bc9788c6c2bf2a8a78e62933b9385e1cc402. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USHM91666861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea1e4ff2a99a07434508f9964237ef74c7c41aeb1fd6fa530f024a32743d385. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM91666864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d73ca1ba908f4693423c911261a77a6b7b910938076a851e78c4f8de9447e0. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USHM91666865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c571d1d6999be000c6e80643143a3da3db09a8160aa807b4ccb850da42f93cd. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USHM91666867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16f22d5d0244d08bec5ce382b482c8feb6006342431f91453596cb8c010eb52. 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/USX9P2009866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac9295a3e6302ef5beecaef255861d8e8cc632e58380f7621f4fdb611705a63. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USX9P2009868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fa097fd814c159d887cfcb71b01f69230b62c7d044d9f027d39acdbcce2a2a. 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/USX9P2009865.