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 0x903490792da59b437085789f84055114e6486edfaf5ab71aa12435ba94f962b3. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c33797c7-a301-4e3c-93b6-a737e8a7125b.json and https://artists.proofprofile.net/proofs/artist/c33797c7-a301-4e3c-93b6-a737e8a7125b.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 0x609f1c496dc32fcf850915c55b15b53c0ff49e878a6c14bdc04b72cc6fc3f20f. 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/QZZ762511449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e52f0b1aa65ae6c88c165ece7813df230fb14a0468a7961e1db0a6328b80eb3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7R2569214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4468780ce7f210e7e03a05fa53e143805a78a462579e857cd2b77dd4dcb750. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7U2513563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9ecbb2e41ef4d5101d51ecc97fe31aaaf289b01b8866883467bd4e858ad1c2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7U2513564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8277c140af6b547a1e55b7742c48b314aaa81017848e68d4221082792196c0. 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/QT3EX2557446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b5c760c14b04b67692425e00dbd09f6f97b51f138b9ab8391e9b610d7c646f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3F32547290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09d903002e679d36d678f03f6d515fff97b39a1fd5ab25a410267456a4ed1e6. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:11:40Z), 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/QT3F82578578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a79d005fd011679d71a05889c68638f2bd4920cb91c0a53ed1285df3c6d843. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T12:59:47Z), 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/QT3FA2597633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285f2f6d50bb89416b7ef5ea38e7a58c3206bae0a7c9d7828b56bc8328ea4341. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3FG2515383.