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 0x55dd6a2ad2d59cbb278c92e73d20e43a3734a8ef856bde649c38463c25d671fa. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c8ec898-fb0b-4b57-ab4a-b01853741b62.json and https://artists.proofprofile.net/proofs/artist/2c8ec898-fb0b-4b57-ab4a-b01853741b62.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 0xb84e9a4320c286f5f29aec76d133cfe20904afd523a0295432bfd148bd2053b2. 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/TCAGM2277859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb60cb1f2dcf732b6a3a1111740959e4c25300dfd21441d47e82d012c7fa0ecd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCAEJ1954757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157681b503a5dbce751fa81e16ea6490a44718f0c042338981dd5529c630d9bb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCAFW2105222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b82b4ca3993d6e1b62c7e34af9eda9b7cbf5b2b39a4f5d63dc58605bf2245c9. 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/TCAFW2105329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35613656bfd8173a64e623161336fdd5a84cac5b47c784b09280055bccca8408. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCAFC2061202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a220802c7c8fba495cfe04274f7a007c05e7e392a51d8a7031c6abac3c57d49. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/TCAHM2312645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0320d8a707d19ab68242b432f2baa867c3584291487ccb351b10b315c7fffc. 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/TCAHM2316229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c318cd788d05c6a237cfcf74973b3810f8cca51fef5b05e722d02e8680e0aff. 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/TCAHM2312951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae856a097f32eb2517fde1abcc649a56185bcfcd050aa03c69c4108d33e420a. 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/TCAGW2304805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d98888278648e840a2a33092dad22355afc4606b0713e27f415bfc210772efd. 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/TCAGW2304718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f156fcded0be532a136976b3dab33b6ecef53f3c083dcfce17255952ec9dc. 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/TCADN1851192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce64c82281ad789ca8dd50371ab79e558eeba70a965942c480dca5e7d4deee6d. 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/TCAFH2010248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459308c027338b8d60c98f2648917f7a44bb20256f39e7ab6a606fb1e4641d25. 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/TCAGA2236640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fecace4f2023685721ff7e158d6ee01c31c08ffaef78731ebcc480cf7518fee. 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/TCAGA2236708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7b553f8f312aadf98d9714f16d4ca3de0c89d39ca3db48bab92ae584491e39. 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/TCAGA2236735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada4f51658740bd9b9fd886b6dfd36089e31c3a7468f12e46c8c9fc16eb34d74. 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/TCAGA2236724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10b3c23f08cdf9bfc71c9d8ab4a35c06ca11c85a1192429fedad80816202f51. 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/TCAGA2236742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283faa29eb3e6e5ee82abf34dc41ac4d9cd0150991741d1caa4c2e875548ec7a. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/TCAGA2236810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0591f4611390d9ced84f9c878a6748e4acb772cdc1636aa701a812b8547f24be. 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/TCAGA2236848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2196ba6362d1382a253360bd5bac325242b96df4fe9f45b02293e3d559e4af89. 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/TCAFU2133517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad85fe46cb1596d4a514a58802c76304242aed7ec365ac979dccb04d39ab3f1b. 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/TCAGA2236887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e53d56e1199df7e7e0ff048897f266c1a1993b64c84f6d3007b7befe0825c90. 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/TCAGA2236958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4964552f172229c7e23b5cbdd9581f6ab4616ae45b0f8b8b4e9f4a7eedea31. 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/TCAGA2236983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51131bb0fa7ccedab0b3a41314bf30aa196d84cb3f9f69994f4cdcc0134ed711. 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/TCAGA2237013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e15bd93b26c61c617e1742be1d6493c567f104c5069a1ddcf0f488234d7617d. 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/TCAGA2237026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dddb6cfe22d3a224d237cc7061cc2c189bd21df2f7e373ab3cc32cec119ad0. 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/TCAGA2237058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13370fc742303e34c04382a3ac0385dc44a53f4436d76ce93a428d695e388fa. 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/TCAGA2237065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a8f238af5788e7db286ad425ea66d1e1879deb77f2c22b95cee0e3775b7bf9. 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/TCAGA2257654.