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 0x3212fad1e32f9ffd9d667410518a727acd84aae49bb118dfb824e3e144f1878c. 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/65a3012d-7e2f-4c46-90e5-9df751b0ee82.json and https://artists.proofprofile.net/proofs/artist/65a3012d-7e2f-4c46-90e5-9df751b0ee82.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 0xa2129f94f3d73c6d3a60b44cca585937c497e826e8e7f505e7d2da9166cdf769. 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/NL4WT2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc67f5aaa43abef676c9240aab3b6dd4e7a6f7380051b024c0e63201869944ab. 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/US3DF2292873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ca17cdc766773ed0c798e26ee67d301fcc303759b02ff04e0b291a31c8ee12. 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/CH7812418022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86811e8b3d4cbcf616b3c9cdb587938681b9a2732d5428ec60c5c93b1a92f28. 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/US3DF2492275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305d45bf3229057136519a6a27518dd909fdf9cfe3aa15fe026939fc8b60b2c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812366159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ae242541046eedcd4473a3edb1393b784298423e178d70ffa327801413aae8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMANG2221414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070303986013471c7617ff6c8fc321bbe03257678dcf66ae1ba6434ba3f7c423. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2266543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970df87beb7e61533a832f4f8e23598171bccc7c4c3712ac9e6efe2034ceb548. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKZGC2203761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd844d930dcfe14d42563def05aecc3208625b41b1843f9cc0ed66f61f4c9a07. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US3DF2256790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efa3816efb68eb2281aab9cf5a983df621d061dc4057e5deec367e9fdffb04f. 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/US3DF2253998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ad0576e83918c19fa548f80fec4c893239d2eb1edd62fce0ea04267a425dc6. 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/US3DF2242142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477f082061193a5e230be81d16709e5c6e290e4946dd6c326192216603692f47. 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/QZS642267332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a29846e4886d58a42f64c5ea6d19498d9b8b58d960e12c19a0bbfe0a40329c. 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/QZN882214660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5d91f87a84f4425467c94d3da29c7f7411782a8076e3328d05a43e09e53f42. 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/QZN882214661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02f503658a1cc40551bb0798b15bb67795bb793f7842332798d4f3048026281. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZN882214662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ea152e4456ed8974f3cf5ae67791ebc0c045ea1b5ee3cda9c2b97fde73ec2c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2202399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e20cae16e0043f293bc7df7eda9bfbb3a945ab0c628dd1bfc8ce92a29082f9. 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/NL4YD2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50344e89dec6b3d8b51e4bfdc35504af91cd7f5dfa3e6ab76aa69e7ead93e29d. 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/TCAFG2010353.