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 0x3e9b4f81296de8f587c4062e7f52d50bc53acbd30eb792e627c8cb33e806ca81. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec06c964-e8c6-464e-a90a-d282e6e10f56.json and https://artists.proofprofile.net/proofs/artist/ec06c964-e8c6-464e-a90a-d282e6e10f56.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Autentico Guerrero - Base Rap - Beat Libre
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 0xf084b024bbec534aeea5c45c1473a809938b730a8345b0e6a81b5fcc9726c42e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZHZ42050976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1e8ee0b7c31b87dec2dfe5546e18ad81431741232b24f362c1a1487c61e3b0. 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/QZHZ42050977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0233b1a1a3046da27a326afc97480da3971d95007c4c024c9f514384bc89789. 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/QZHZ42050978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c75238baa7ec9fe62c8750e64276630a044b9dbdd371d57cb614002cc0acba. 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/QZHZ42050979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c41362a33a7300aee607fab10463a1b78f80ff3df6b5ef05cefa88fdda5157b. 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/QZHZ42050980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1292e48223c995bc5648eba58b98930bf058b753da1fe5dd68359873d54b2b. 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/QZHZ42050981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f2db4613c73d6a9e946204e4e69ec19be056e84418b9695e183bd37b466c6f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZHZ42050982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca71156538a268da0b9cb66ea2229e7b24da50afbf467494b72cfcba6d299aa. 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/QZHZ42050983.
Vibración Correcta: Freestyle Rap - 90'S Boom Bap Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ee35636732ff88e0168a64e4135f56d1695bfc4e11d50a5a0b58c8a07194b0. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZHZ32177739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873bea199ceee3179cec9af2e0c04d9108db444bb30672a2aa11cdea52991ed2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZW9N2246855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab30c0dcbe93db9ef83ca19b654fb9afa1b763feee524d6265ada01d7f392f4. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZW9N2246857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556ed17e575d4052f9abc6308504fc7c79be470168f16db98714e94b4156350f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNJW2441712.