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 0x238de885eb87e1004b7385ae46fbef4867f33f01d7f3159f967f8d989a9f81e2. 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/4fbb66d3-18a4-4f1f-a8d5-a40c97941db7.json and https://artists.proofprofile.net/proofs/artist/4fbb66d3-18a4-4f1f-a8d5-a40c97941db7.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 0x20ed0c25e0dacb1f8059ab17468ccee525f8e3291cb115f121ba10af7a8ab2b3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:19:27Z), 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/TCADU1888397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096671d6435d382bd33715dd2a1d362788b13b992a163914658ce1c18e8bed46. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAK472105205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c55e98a4ae6de9a840e2113bb1a6efeef73b08cec1a8bdc3809736fea46d78. 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/CAK472101801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4810fc2c1a69de13410192934e626405c80c53d2193882b442154cb769ba014. 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/CAK472106002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38eb51abcf958c523f82e8aa24171c46fa0e0e36a5224712e3c0eaf69860f6d. 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/CAK472106001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59f552269f8d9f2f317d8231393e71e19835af1b992fd568e730b8ea3b6d163. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:40Z), 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/QZK6G2231502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b1f1198cf661c97793a5a8000591945c4feb5cdabb1ce1184a65f4880f7b37. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:51:54Z), 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/US3DF2424824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61a94a5faedebc071ed551a177a005282b072e05406371bee4d0c24b4137899. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/US3DF2402489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9216f63c359169f074e6e692bd45e31202ef2e05cb6fd48b2a5e8e064e5b4a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2424825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34206799eb514ee180ad10907d7840e583926d07ada6b1da34d66e832b28221c. 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/US3DF2424826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe457693d85860c88c151224f14578459ded6d539cbb2d327d6e2d4599ec8d42d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTB42430820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa992244075e44e2b68484e697cb83ddd9b29470a325afe9677cd18ef8d214261. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTGW2404009.