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 0x33eb6649317a804a48a2e6edf5124978a4a7104bcc6a146509811730f2cabf75. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f052a2f-6024-4faa-ae4e-578a4539eef3.json and https://artists.proofprofile.net/proofs/artist/9f052a2f-6024-4faa-ae4e-578a4539eef3.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 0x25963f1d332932c567445e5fe8275fba2a8e49673f6b30d8b2e7338a79317466. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:43Z), 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/UK43Q2378813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f7a0ef5025fb0b9437c87ebe27d0890ac9c3b7fb1d08fc61a9ae2600714f2f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:09:14Z), 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/UK43Q2314720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa121da205242c1e83cede44259a1dfa18ac1c5ee6a5c7da859102c5b3efe0bcb. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/UK43Q2391984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3106d76c6b27d644d18dfc86af8d926767139a8f0d2742c04dfe74638d73c36. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/UK43Q2371268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3e05c69c666e26875a7960d94a04e679fd22bc98c00648c92eaddd3145b1f7. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/UK43Q2386579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce8c369f54acdf5f696bb7104ac71543b83b384a53188ebf49a6179926fb9dd. 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/UK43Q2339003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8318ee404cb3fecdce581e16bf7ff731c98ec1660380340307bdc81a3cfbfef2. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/UK43Q2447464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7be6342f8165539478ab85c54f1a8c4f7336e1a29beeac91449342b89e3b77. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GXF972434062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ea06197345373659990a10d9a7ecc2cd872adb71dec0a025f86d104b4678a3. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:05:45Z), 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/GXF972499653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413d769f8d217d6c1919dc5d63c85dbd5b0fe11e490a265941a495d4c7adc17b. 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/GXF972467784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547192be27e69ed48f628e36d1a16092197183672825d6b80ae99c693a07f84c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXF972464367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9233c1744cf8a26d224032d0016972837ce7fb870f08a56b1250438809ca6c. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:08:27Z), 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/GXF972423345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9915af0f66974871d42c9b1a0971f7898a4d8a3a39c3c5164516fae619d11a1a. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/GXF972452486.