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 0x2f12274fc8a57dc829718617ce246e97c709f4b2b55ffda198fc265bb89d1987. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90d7fb7a-34af-4ce3-89b4-7746a1721d14.json and https://artists.proofprofile.net/proofs/artist/90d7fb7a-34af-4ce3-89b4-7746a1721d14.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 0x465fffba42493207b14d1bd9a98b9edfe5c6e6547bccd5c4f0f8e58c559a6675. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUM72112127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d550dc0b086eb504794f93e9d8d431a39fcc760eca8b79edefcef0be9b947f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUM72112129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fae816e57d8c1fa8130c529b452bd1c319d8b7acf5bd99bf84f5fa130288065. 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/USUM72112126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d93486ff493d6e6bc211969eeb6a02d66ae90dd8fb9f447e2f65dd1f5241a6. 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/USUM72112130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd151fd679c9c910c5fa0e12ca43cbdaf9e4ac71b57b78a248d36148037de523a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2282949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74226a9ac9ab4b8da2f8dd423c46de790ab2e72ab70ed2ce4d80407ad5cbc405. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2271226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8a6c8857c6c0a1c5a38f2257b3af27896a4478a582c9472aed1c1527da7dd7. 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/CA5KR2258561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24545f87f746789d71f817add20e6634d1895593adf534c6f32a8f0ffae6f380. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUM72118138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55a1f59230abb32a943bbe9d8271a3eedb3d05ab2973e3ea65f5770df8a75b0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUM72106294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbbe3a2a1ca585c3c286e5e624d0ece280ed74384bc9e342b8d2cfe4601f5fc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUM72102565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af573617cd4124492b530b443ed3fea3aa03990853dfe138cceb88225ac642c. 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/USUM72024604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500dc213519507972dcba5e1b9c706baaa648b79c9f0d5f2c653ca5743b8c58f. 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/USUM72100163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafcb27fa6f75da3485ffa3d3ac8796318c221956f2267f0359dde154439a215. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USUM72022694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d9cb210c1eb8b8525fb18d1343f72d8b4289cfe6c21aef193f13a70e94d728. 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/QMEU31724288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d18b4b829d91c0e44caec197fce919ed2505ce3ba3c10a93f44d074ea41d87. 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/USUM71025042.