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 0xf0a09a036320360518039b2aaf0b1275c2422d9e93da3d290da294978c9b5642. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d9e1edc-c811-426e-a749-9c66c4eef79e.json and https://artists.proofprofile.net/proofs/artist/7d9e1edc-c811-426e-a749-9c66c4eef79e.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 0x8aaa0203daf62f7f3e4d24b5e63deefe2d46d66b0b3430455c529afa64a19278. 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/QZTB82413080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d5f1368e3687289146c05abe1168d7dde56091151a65df30c120941c34d356. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBE2432886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a4122069a8a2b2cb140d4cd2caee7ae0c1cb14cd859ead2d2d5b266b45c888. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:02:53Z), 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/QZWFV2430894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83f7c275ac33c18341e97966090500293308a48b9ee4ce3f33f2599b6896cc0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ72508759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839fa89fb73ce5ab37d917a507ce8c2baaa7d266e4644da6de77f627c4104647. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:59:01Z), 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/QZDA42543661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9872aa9356ccfe5530c7398a28ce0d59586c5469c4e0ab7d4ba103726864eb5c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:33Z), 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/QZDA42541907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f643d110e0dbeaf0b24b7acb5eb245962ef6dd809d431dbe2dd7b578904ea86. 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/QZDA42545493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5412bf7cbfb48502bd8ebcc1d51444599f19d011504f078f74269a68ec56e95c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZDA42543662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cdc2eed6184ae21aab816ceef0bb698fdf2c10afbb5298caa35f7e1fdbdd39. 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/QZDA82588385.