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 0xfdf1e8bc299c149e8c0854ae56815f9ebcf57a90916cd9a84fc2d5124c6ccf6f. 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/b27832f0-ef1e-4d68-8861-087550251a38.json and https://artists.proofprofile.net/proofs/artist/b27832f0-ef1e-4d68-8861-087550251a38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Itzia, Tango & Cacao (Original Motion Picture Soundtrack)
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 0x7649c43c1b8f5168489e7e47b845bc58787e890695449ef413db0bbdd8fe4505. 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/ES71G2036112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e870e48cd1ed825a295177a60d0569f5f72bee246f9190c7db3e8f0b7d25ce. 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/ES71G2029407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ca1f7fa2f5dbcfe6f82fa79ac97f5a0d3d63cfd55a48e0a18c1e3d48788850. 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/ES71G2044192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf443924607bc0b3bd170fb735f16be30fa5c0079f6aae3ba4cbbfc9e954f74. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ART031000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00244a60282ce77be30365e320c8f336ce08f3ba9a236a303550d9071c07e4c2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ART031000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb6361e7a633acb352599cbc80a3710eef6c55e06b08ad83fbda5d1efd0794a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ART031000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973fe360e2b782a84f0f5e00c0c6468ca877afebc931e55b03d37d0003d57cbe. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ART031000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf97ab283888f3d2f700eafd58e614014e73bb5eedc5ed117a8fc0a9e2c43736. 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/ART031000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926b7fd4a2c5cf3ac878fdd4b19b934f35c4e3000e36b720ab9c9c3f45bb4628. 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/ART031000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11372f4af6876262577cc2cf3ddd2cc2c50d66b1ed09e73bdf2d5f691a7e408a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ART031000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698bb8cd702b263c98c8b911f3d0ebadbe0d26e9cc033915b6ec18be076e4392. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ART031000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc9993f254123797312521312244c016491a2390287837ddb07061905a7e6bb. 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/ART031000024.