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 0x9eb4857e25d3048b3865a33a66031f42fb1deb8a1d076323f1b96538f31fd6a1. 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/1426ddff-1bb2-4857-b772-77d4072940cc.json and https://artists.proofprofile.net/proofs/artist/1426ddff-1bb2-4857-b772-77d4072940cc.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 0x2a9ca3a8ce2c753c4b8158f5b952e824087fdce0b1ae683245e7a9f0cb65f63e. 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/QZG2X2402759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90237c4da708a83d16ec9ff8dc3fd178b7fb673bc4e48513315e76b94df8ade2. 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/CA5KR2365701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8963a4c3758ebb68646bc00eba67c738142969641a2d6b3397ed8fffebb5fb5. 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/CA5KR2434659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0165263d6f2c4be4e5c6380e4419bb5fb2fe1765dce078b72b2338c0b24b0f. 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/CA5KR2366867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae1bfc05cd8e3a2c2993cf1bdb6eb5b7afa57587319ca82274fb2062fbe0aab. 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/QZTB22426969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f75ff7e282441d3a3b7fea36db28c8dbd51c1b051528d56208b69046ff9b448. 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/QZTB62433924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fb1d76f98a4b068a89daed407fee575f494aab3f8d279257b0087b151fa1df. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTBF2435451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22817a7772bc1707f0e5e80d77e31dceb3bf3e63d40804a223114e344bed215f. 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/CA5KR2485489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a41eb17adb8125973770dc9ce7f7d1ab7d68ed22d3edf7bb4f14dc611b70c6. 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/CA5KR2485486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf668663ff86afd43c4ea3032277985aac8ae700340874a65a9ed05a75172fee9. 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/QZXLZ2402301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675582d5d1c45bbd43b513bb4622a36a12f0e04b3052d2192ba82ebd15971fa3. 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/CA5KR2473538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8963a4c3758ebb68646bc00eba67c738142969641a2d6b3397ed8fffebb5fb5. 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/CA5KR2434659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0165263d6f2c4be4e5c6380e4419bb5fb2fe1765dce078b72b2338c0b24b0f. 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/CA5KR2366867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82adeefe9321d68dc8bf9bc62eb405c4f632a14476f96d593b74b9f82af1ccf8. 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/TCAJP2533654.