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 0x207d44c83650ba5f31bc3731ec8b3746cf97a843052bb01d83ab827ed2eff279. 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/2d731f15-1c20-40f3-aeac-81dde93900e1.json and https://artists.proofprofile.net/proofs/artist/2d731f15-1c20-40f3-aeac-81dde93900e1.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 0x733b8a3dddfc2216afef0bb7906d65418894ec12f79fb6d6537411414d4e3633. 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/QMBZ92471368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd70e4e155cd6b941a42c8a8a387a57b1a2a3eb2572e9f9265c33944de70d4e0. 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/QM6P42449846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf744a0e9c6bef2e11613f10f5a36ad00aafa5a02de24a352e7e3d756cb901a76. 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/QM6N22408204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb52debe57cd1b18bb7f1233c191b633936f797f20b09c00ed0d79f8a27744fc. 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/QM4TX2417847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ab019b9eee248047d9679f5cb4f9972b3905278643f2f659547b7f2deed66f. 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/QM4TW2424819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dfb71001b1135c8c00eab966d76aaff1bfba173bfec875475cea67b328bb33. 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/QMFMG2315816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ee8c25cae95d9ca0dec451d071fe525d221ef0f7bbc57ea301a847f4dcced7. 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/QMFME2396543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a89b1fb16dec74ae2ef701700c66ad081c03e5de979cb1292e6225c8ed6e787. 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/QMFME2338907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59adcf5dd9c0ad219f6c29c08a3c259ed75a2173655208ab5e46790fc237c41b. 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/QMDA62338569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a1eaf64937e8857b52f989a3af109da88ba1a172a2bfea8ceb6fb60621664e. 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/QMBZ92317595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420b14c8a8c76608940b0408ed1984ca71325f33c4f46efabb7bbb4d8ceb03fd. 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/TCAHB2384734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd11ce123695125b3346c96e596580c55175e8c61e49948c3bac6058c9ca612d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAGX2316394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c277406f1f1292fe05800fd1c71540634b1e5fcff8b26bcb37f3356fd5234a. 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/TCAGM2237562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbbdba9af916044b15b0b8586dc386c4c749d0136467188c56e446e2622cf50. 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/TCAGF2235461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aeef7a1dc5d6258e699d236b83a063e8f6620ef031f123d4db8b4383d335a1. 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/TCAGC2281448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd8fd24f046d1f1a54510697299aa64e5be07f092942eefb20d8c5cebddb805. 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/TCAGB2265956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b86bc1bfe401cb98ed3a58a09790e902fa31641ee67c731f3828d2ab503a74f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFX2100628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f57784eeef05288530c94c4c97c03e5b7f7c1b643b53c43db376a83fc2d79c. 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/NL3BN2100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa8bffbec859d1607c8587f8e067761953679ee744213cab41dfb7f794c2ee7. 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/TCAFM2130441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe007936547606d1c3896bc26fca8b1ec4a76ab8b65cef0e2c341bf000fc1e415. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFJ2178042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f70cfc8f6eda5f75363c29a1a2f99526761eb928314510123ba6eccecd8d39. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFH2018255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3c8999874439861cfc064c4da165b3fd51e08143c341eaecc4eb783e2e3d6f. 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/TCAFE2077329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97cc0f73156e61176fb3b394e983e5a64d27f697eb850ddd2b5e48cb1e0b156. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEX2088212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe02c19967f7fbd7145a9503a4c857d2562121ba270066b51cb90308a5b727e. 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/TCAES2081163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1006881f2f434bde195b2ca4666d852bcab0673f4d8952a891b90d90513a4d9e. 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/TCAER2007023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30892119682e2798424a3c571e81bc7e72d64758d1ccc458e5258f08fb0e7510. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZPLS2380363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07be02c894e345d02b714d8c6f17dd808637c34cf582d10b183af90419530386. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA82115809.