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 0x71cf1f385b33008ce12fde391d0a404a9f20fa3bc1abf007e390a0aadb2ed197. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41658d9e-1ea1-452a-bb88-ba73034b4a12.json and https://artists.proofprofile.net/proofs/artist/41658d9e-1ea1-452a-bb88-ba73034b4a12.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 0x503946fb938c8119e1d3051192f6c195f01023a0fc193b52737c0817a6106dd5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNC2041691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94dcf16bcb0c1ac212e267470abd86b04e2478cddef1b3181d793ffd8bc7758. 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/QZHNC2041692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ea6bd375eca7b5224305ab64203069c8e798942cb55d2a2bd09a1bcc7b04c8. 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/QZHNC2041693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e54ecba26d1fe0b0726227c8766b9f7ae5121687c8fb797c5cd52ca953059d. 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/QZHNC2041694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd521d2f97b5223faf1992e7d55dcbfe102a526e7bd6a26aafa6c44dc6aa34d. 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/QZHNC2041697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ea5d2f9494f2b2f97ae254388c559cb79085b703eeff841088130561cb218b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZHNC2041696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2340c97deae866ef6fec7b488f29dfdd45c16ef978356e81dcf697e897a304b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHNC2041699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8035e7c401248746996a9115036c0520f9ea9f02b1d9258c3222bff24e00abac. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZHNC2041700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620e1459ed821e123e030fb9a19d427aa6d27071b4ac961102042e344cce36dd. 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/USDY41808898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee6ac36d84cc6a49d7e50e188d0c6965485d40d47a8846c614803b3c83fc45e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USDY41808899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fac1c0eeeb76d37c0b53faccf0d4ddfefe09b643e9fa7fce9e97484500667d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDY41808902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9618750d929a492cb53865e7ec014fdf9960a60257696f5a401292f2327e1a6. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USDY41808895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c042728be6f6fe1ab0eecd2cee29fcd1c1fbd0c0ef97bc103c914fe0ec57afd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USDY41808896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8196ef0a6103ed8398697018acdca98463f0cfdf9cfbb3a1866d00080323d16a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USDY41808897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa191d52c622e55c2e6af7e49859305556ec4f221d98bc0b9a4523a360e3625b2. 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/USDY41808901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94dcf16bcb0c1ac212e267470abd86b04e2478cddef1b3181d793ffd8bc7758. 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/QZHNC2041692.