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 0x00348ebba73d58027e70db3544dc3127c306fea55cd95db5fae79e17abe52750. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b57d3c42-a7fb-4bbf-a2ce-97b04150c336.json and https://artists.proofprofile.net/proofs/artist/b57d3c42-a7fb-4bbf-a2ce-97b04150c336.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 0x406ad4d639894d9931e0e4fd89cca306b8f0f010c0a1398cfe339c2c716696db. 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/USANG2149682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3460c33d92fefef64c52b1db76f504355a73fc4541aa96342d0a61f9ad5faac. 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/USANG2152317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaf0b09858b5b18594f5c0ac5be4f5230b0bb50bc05e8051bbd36328ec11bed. 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/QZHN72044589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6e3e4445e7dd39e6b84ce533c33c83a245e3dcb8e2b230d029c98037ae5f83. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USANG2234760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4defd6be44b923a433c462ba44fbee3177307b25ad187baae29747a616d7b8e7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USANG2234802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655ebe20d5a8a72eadbc1f3a9561d43e2a369e8879ecd2460969776acd05ac0a. 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/USANG2234797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aeb2e1f72ced9c13e3738f75e2a92e9e73d67503a23f7220d553c1b476306f. 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/QMANG2233613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb567c8b9e8f1f3bfb158e10d2c87cceac0b03279606cd3036289575e28848c4. 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/QMANG2233723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe059cc151d0e222a5e44ce3c0fce3f0c1fc8673330c31659179bb6a8479d468. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:12:17Z), 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/USANG2267194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93e7255468053ace6b5074e23d71073653d20ea597cafa044641e9b99fa2e46. 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/CALRS1900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a938156ba5c8af588fb95a0436ab385deac71b28481638134a9e2016bd5cd0. 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/USANG2291891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16460234dcc1a957f62e33298b1518343a79486b1a68e9107a42232457639e96. 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/USANG2292060.