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 0x8808537f320a637b2b6e2497822fb18db8a8990c84b0f0c0a86ed2488f312cdc. 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/9f26cd86-5985-46c8-ac96-9dcd916b966b.json and https://artists.proofprofile.net/proofs/artist/9f26cd86-5985-46c8-ac96-9dcd916b966b.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 0xb0e259df52bfa018ff27bef6623391a3cc1bec076ddacd8e08b84778d8fcde30. 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/DGA052294556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42144945bb99e180f31697edbcb21c9ddaa526896b0816d2250e57404d8813d9. 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/GB2DY2200696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77469cb12ba87e6edc65c62d5ac396020dd5e24dbfe7d94f51df5aa6f4435eb7. 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/GB2DY2200695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b7081d7bd8eb0e2d286c997fc1f86b71ebfce9b24acad16fa4fd80b4bc9b56. 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/GB2DY2200697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406d51efaf8cf99a2a1d34e71e304a698f32e88b29858c2becb72c8fff86d545. 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/GB2DY2200396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930ba911891c9acaec25932c8faef52ea4995d0a0886f877fcd9ba6f1f48cc1f. 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/GB2DY2200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e350b1f004a4ac5239cf4504e3533311f2772c3794e146bc4ed1a48526e12cf. 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/QZNJV2135097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aad04516e33058b6c47827a3112033fff0997d9794ed698de5fd259e0013d3d. 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/GBUM71902266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefde64bf893685e42dc01be6732970d970541c0e77e1cff3da8197f5913ed90c. 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/GX53U2426577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aad04516e33058b6c47827a3112033fff0997d9794ed698de5fd259e0013d3d. 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/GBUM71902266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fe1071005dfe7ee8fbb3fcf4efd596202955ad2a03c0bb598c09fe247cfe04. 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/GBUM71804832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b9b73b2867a618180e8c229950d917bfb9eace04058aba576bfc02b08b4b52. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB45A2300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b9b73b2867a618180e8c229950d917bfb9eace04058aba576bfc02b08b4b52. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/GB45A2300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b66f559ccb7caddbba079b0c1dd9f07e5c1271ad2a17a9b739baea30df0d927. 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/GBBKS1600172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ce506f0b1a368c69eb89e0a59b2bb134f4d2040ac72790a13926ba6c0070b7. 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/QMDA72251624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d76f365bb6a61c761dc0f796f0f2c226dbf889b2ba536abcedbb29cf99d300. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GB45A2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4db55f6aed373d6877e2580aa25c26c08c1d4c539088d8389ec4f87f6f699c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GB45A2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3919d3b1bde775f02fe089a2d63c2dac128fdf211ab65827179d7e8b805d4477. 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/GBBKS1600163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3f791be0e18c4402aaed22760823ef0171e69ff6160807ca14dba106867d18. 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/GBUM72207190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a133daf2b346fe7db33e8003f0f0dd9f1b0d2f490700d3f4cb73faf3ec4241e. 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/GBLFP1833053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f960e7cb24441d8410115791cf40609d9574998018bac656b9b2e8d192b521c. 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/ZZOPM2106716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f960e7cb24441d8410115791cf40609d9574998018bac656b9b2e8d192b521c. 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/ZZOPM2106716.