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 0x1b4c3f1ae6bf4c057879276eb6cbd18273069d2c7eed886a5e338769c0e904a0. 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/ccb1aa2c-a254-48b0-a57d-2f78d5d81125.json and https://artists.proofprofile.net/proofs/artist/ccb1aa2c-a254-48b0-a57d-2f78d5d81125.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 0x2e5b29c142a7d62bab22715ac9ce6165b098c0f7d0539e5e9e4ec8e57d67b4a8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEL162050602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464c5d310569133029884d61d05145b67ffefd2d296dc1106c7a9f42bd80bded. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/DEL162050604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bdb2b799eb4b9396d7b00b28988962cce852da49a4286ca8ad53ecafa67597. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEL162050606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246bad518b18ef506ed2a6efd53aa207f8c6bfb032e424c20f87c54d8fa2e033. 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/DEL162050608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49de4ddef3c83739c569b9070f8ed6bbda3c2d356d48eb478b796f0fcf758a6. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:34:08Z), 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/DEL162050609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836ae0926bf58f9d814b1db30e2edcfbd2066bd6ed7dd83596294bb9b2bc8d56. 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/DEL162050612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7efb524752459efc1ecf86cb0ed4c0ce171f83b87a8acfd7ff022ff33a41c1. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEL162050621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32226b0dbf42797bba347fe945d79fc06c5abd5a73075d0acf8fd51f4f153705. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEL162050622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e86198e0cbe872fecc0e21fb6509f07ea26ebed39e43fbcc70b91c5340e195a. 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/DEL162050626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d50b2da4396e6db9f7fa5d63b886b90ec1e0a91c66661dfefd42718af4d5d6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEL162050628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c221ea2a3e78402347592c0ba21837e9f599e0fc32baa9b4a159d41683315c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/DEL162350204.