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 0xa29642d076000d2e08b1ae8fec84e977157be595a5376bd29ab218c63c21ca11. 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/df392ea1-2d5d-4ea5-8b7c-72fec6c148dd.json and https://artists.proofprofile.net/proofs/artist/df392ea1-2d5d-4ea5-8b7c-72fec6c148dd.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 0x62f11002be7d26623f07e735d190b8a565ae84e37a5326490183fcae3dfee1a8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USTC50869193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440ede17921f1ff895973fa667c6fa3183c8883aadcac0c98855bfbb3ac42ca9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USTC50869201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484b49ff0cf06824042fa1f53e169690dba447489a2254d0e41873ae5eccccd7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USTC50869202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad1ef6fd15f835327b964a190959cb88e6c9e8853f275c1d6a37ad6f273838b. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USTC50890610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf0fb7205cb90038a34afc2c69e1d904e48a01aa253b9ba3d42acad462e456a. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/USTC50890614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426e96f99720a63ff80e97b45c02352ebb00c7f38baf0671511948bcb207fb5b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USTC50890619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44152051b69eeafde51ca060374fd68d11a6e312560be74ba4fc81c6c13e7e1d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USTC50890751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3888876668b4f4b81040e3dbe53c702503be6959f563f07144412092f4033357. 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/USTC50890753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd243b54a730f6b05adf1bf8433d15e5cb8be2990175d12eaea0b0924d24de1f3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USTC50890758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6100aa23b4477eedcbfcb9bbfa95e31a23654af1f23fd16f64e28ee167f42edd. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USTC50890764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf37c35b2f25e0c01bb31b34094721bf82a43ca6120191c89cc10de01019ece. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USTC50890765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8363c62ba0fbae0a11103a7b8d832248ed7f5da54a06d87c9d921a2d4a6ad91. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USTC50890769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c3b5b293b500fe8e9f516d0e0513ba449fea2f3723a61494c55c4c3cf4b8a9. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/USTC50890770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442ce6d376b268c1054a56dad7ef48a70a9cd39dee1e6c890822a4981f16318c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USTC50896680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4db2adfe0b1bc8dee1f7d665c1640b4ac1b7313fe4e631758beadc4019f1e35. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAAW1198371.
Instrumental Hip Hop Beats, Vol. 1: In the Mix With the Real Jorge Quintero