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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bba0a84997e81be63ecf0ca17e4937fb261189bb34e9f53c055145eebb6088a. 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/b348dc5a-bc0e-45c2-8798-2931ea477f6a.json and https://artists.proofprofile.net/proofs/artist/b348dc5a-bc0e-45c2-8798-2931ea477f6a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84392a41507d85deb75445bb3016a7765ce2044026476efaccdedd8a5139224d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMBZ92092685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6592957c72d796dbc63664987371d62a500cefb63fab6bb02379a80195da79a2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFMG1580818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5063087175d2382d429bba3d1354afffe733d7f1ad6384614a131f8f73ae5065. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMFMG1580822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1de70c9632fbb46206622ac4c733b0be92e35fca37721a2ea108e4a0ed9a86. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:23:05Z), 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/QMFMG1580827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6592957c72d796dbc63664987371d62a500cefb63fab6bb02379a80195da79a2. 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/QMFMG1580818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5063087175d2382d429bba3d1354afffe733d7f1ad6384614a131f8f73ae5065. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMFMG1580822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c7ce903bb30c47ae0f6eeb027ae0ba8c2ff3bd92824e5ea53da3a053a3ff03. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFMG1580826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a836302a09f5cee86b1830769cd81dcb867397fb90d6a2204dbdd899e4926d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM7282025297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaacc1695ede0602219e44a1960d442d3be1a1d6e135adf47a8bf7d385b5f1e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CH6541777191.
"Cantan los Poemas de Don Pedro Rivero Mercado"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1082f0f688033aa9c1fda55a690c33aac000ed1fe62261a40b71db90ded3ee7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH6541777201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597faa5c86dd555381cf261bd232388419194bad73dca2cafbd1ca051ca31cb0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CH6541784702.