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 0x2dabe5a4f914766c72bae13fd3bc9dc280d1e225de8ae36e8c93ab777b7ca9f3. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66ddcf49-ae92-4fc9-b0b4-2950efdf2539.json and https://artists.proofprofile.net/proofs/artist/66ddcf49-ae92-4fc9-b0b4-2950efdf2539.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 0xfff26fc32b3e5048acc8ec85df4397edb4859441736984a174b50f703af11399. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADD1748579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d28a5221f7e4fb88be1576299a37f3b9714eebabde89fa3e4f57736c83f9ad. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:05:41Z), 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/TCADF1747690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb670cccc3622061ec267b89c3c5f30be5914455ab2b6ffd658b126778f7b8c7. 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/TCADL1844893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b29ddab9dcb7847fd9e87f6bea7e683167a247c5d4a094d161e053aa5736eaa. 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/QZDA51800461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed34d62f649a2801c22eda6c93d323f24d1c825430bc1caac6dd47b2502ee9ef. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:46:33Z), 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/QZES71846910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b334cb52810dcc7e4a28f96543580a42ddc6231bece48e22f02bd50c8ae738. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:46Z), 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/QZ4JJ1830027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f5878ce8616558d616d2b26686cf13a37cfbc33614deef4f9e7b52cfbae940. 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/QZ4JJ1830029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffb65604b2651971ad6b3347a6477c6e2d670b3d52fc7dc95c3562fef72366a. 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/QZ4JJ1830031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162f4b12ecc4a793a894f393967f6e3ecee2d1ffa239113d2eb44eef7ee91c52. 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/QZ4JJ1830035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7c245ea864e40ea58a7adf45ac2e2119e998b81e1e03bab4c2f0e7ea1f7aeb. 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/QZ8LD1988096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0a0e4770490cc923321c56814dd48677c5ebe57656d1952eb67e909f773143. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:51:55Z), 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/QZDA81999030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b8d5dda85000620d2e671c1f369e68260415fe1e1853a839130fd8bb4a9b74. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZES71973757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b88c0e845ea233a262fd95b05983fc019a7cbcb579704b174471d6d59b0dd5. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZFZ31936464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d59708a801dfa610874627b69fe6f2fa0a2148d4a6f56c7d29f362d89f6945. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN31914191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f93e7ff4f29f34f483f95858c26b22255878e5e0e2fa0f50fd9df3a21ea783c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNB1987389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b35925c27a363d48c5c4622e0b1256e61c9ba8a441f2cc816444bb0c31189be. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZDA52001957.