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 0xaa48ee3fad7eab1c334b8b387a8ae907a1eb363ba2d08d6354c127196668b41c. 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/59c1d776-0321-4cbb-ada3-afcbafdf7b5d.json and https://artists.proofprofile.net/proofs/artist/59c1d776-0321-4cbb-ada3-afcbafdf7b5d.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 0x3ce6a30863f5f52277023b8ca5fa3e74d7857efb5b5f67381b07dc508987bc77. 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/BCHY22300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458fb1b5a414d5db089edb13c8a3997959968ef1bd5ae304ccdf80c5779cce24. 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/BCHY22300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38817e0d43f473058adbffb875f84477617af5e389ef56ee83234923c59b4171. 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/BCHY22300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458fb1b5a414d5db089edb13c8a3997959968ef1bd5ae304ccdf80c5779cce24. 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/BCHY22300007.
Natureza Cibernética Vol. 1: Deuses e Demônios
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadbc64fb7fd7abd7b8bdf5da9ffacc3d7a4ef96392957fccc5e6381354b3bb9. 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/BCI932400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338e66d7d49441cd442b9547255199f84ee9bfd6138eaf1a0b3405491a4a3a83. 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/BCI932400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bc809c815be81e8c9fc9608d177e09d78422183e5285caf7fe51a35c52b9aa. 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/BCI932500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51fed860b4a2ada0f50f639745a756b3bd266cf908d921d7c7ef7c997fbeaa4. 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/BCIMT2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134d26c2ed6d919d6f62d08a3616b8f3d704d18a7317a95421adf4a2a352082f. 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/BCI932400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338e66d7d49441cd442b9547255199f84ee9bfd6138eaf1a0b3405491a4a3a83. 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/BCI932400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b27d50e64248b14dc191275fa08a4f89ecf297f7d6d0c7f922b85b73d72c568. 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/BCI932400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63b8677dc9c64e3fb48f0331c8e533c50fe640949652bd2804351df79f5b032. 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/BXIV82451339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf1c4af0d5703f47ab414cf53ce834a884ed3f9fc9a2dfe94e286766dc477b4. 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/BCI932400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371c8f5b1808c258b5dd7c30328fad192d1088cbca3cf41c30abff380f324715. 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/BCI932400005.