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 0x2aa522e678c98ffc68b0bd1e559882e2fd971952e9d0dc5ddf986c6d9931bee1. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e5a69c8-fc9c-4886-9570-fd1b8fb069d6.json and https://artists.proofprofile.net/proofs/artist/0e5a69c8-fc9c-4886-9570-fd1b8fb069d6.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 0x9faac81f146f70ef36575240d3733f4966af041e383c851b87810b4f87d69c0a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:43:28Z), 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/MX5062102160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7616d8f9cfe2ed43b1860b893f49ae894dcf0f5dc670af1e8c2b3efd33e672c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/MX5062102161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2054974b4b023ce4b3f04b4eea6c093e884ced85f73c8297d1d03e32a5a3fb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/MX5062102162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be73c2ad30ebfebf4bf241b70fa9e89c2494d47dc2504a2366c5ca73f1c69b6. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:42:14Z), 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/MX5062102163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be5f30129d916f6e1020f33df1df04259ff42c1c26ff49dac905c60443d78e9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MX5062102167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6ca75b622ca2d691deddc7e72a8ac5ee958c5ab9bf8574667c051cb3f845a2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MX5062102168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08c713efd7028f7145caf5eb244fb20a7a377bd826c151203dca92593ea9ceb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MX5062102169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cefca0b7a73f5798aeb4d9848179df4128c7a7e5cf880d70ea21e9f298851d1. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:28:17Z), 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/MX5062102170.