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 0xa9bcb74247680c8f66d69c29d06fe909139842fde4e32e744e379c7280304082. 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/fbf2f796-7031-41c1-ab3a-065837057391.json and https://artists.proofprofile.net/proofs/artist/fbf2f796-7031-41c1-ab3a-065837057391.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 0xd369e173e685bf6b385a1429e18224e84902ffb4762c6327608c4c9e54ac22c7. 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/QZFZ62118192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8255f80c0a366a0d494a30b887f49d308eee0c954d207ed49ddf9eaab53d52. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:55:45Z), 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/QZFZ62118193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e57e4538d9b65b419aff8e8f4efe3a1a7ffb8a38fefb9017b8c7276c2ec6436. 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/QZFZ62118195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fca4a6decfecc0b998cbaef9fb7653e84146fbf31682accb2f0054ffc885a7f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFZ62118196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9461cfa2be448c87c403a628694b00e9a8cad14447710d0f9eb82ca699b7b6c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:12:27Z), 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/QZFZ62118200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed0f49b127b70804e8881f9bc47ed9fd706a0d0e08eebc460a4d97ac9dceed1. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZK6F2180035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f266d1acc2c31da83e2bbd757cdf30a71f545207ae76797b36ca908973343f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZK6F2180036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4452224c04c9153516c900bccde830f9dd496ea434fe1d24184575ed9cb814e2. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZK6F2180038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bda9c5added54647c7b16a412dc113b94202c58461ce2489c07bfc00766257. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ATIB32399006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c111698d5e3fa6052cbd450e2e477ff530fb60b60ccc19fc6907f76a4a9a764. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATIB32399007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e472c09044a40857729c33dd36f5ce141b7e27cae9c33a3f8baea398a229df. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ATIB32399010.