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 0x7fc999585db2f2b3c8fc17512da5c660069237e6ea89099d59f7d6f28de8c6c8. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be0595dd-1a7a-4200-b2ef-20ce4f231b1f.json and https://artists.proofprofile.net/proofs/artist/be0595dd-1a7a-4200-b2ef-20ce4f231b1f.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 0xfb3b8dd93beab28a702a66634811d284bf9c8aae8d0f0b5e7c0c2bce377a692f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBRKQ2585127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3360633ccdb2b871468a8bb15d7438b8c262aa0cda454dd3bb435ac668f1255. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBRKQ2585133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4f17b743848c85877ab7a06ba81d6c9223815ef230226bb3b015d69cb53b3d. 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/GBRKQ2585138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78679b252af5617086d1e13291364fc5747e8429212bce6b8f1a2d69dcfd799. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZWDE2566806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1920767b060bdeca7b475934b50510712d48356845326df2741ff2e991729f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:44:00Z), 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/QZWDE2566861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705cbd3eba4019731c187747a6f5adf5b2355f2b0fc11c00c7a1b8600ad797b1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:19:03Z), 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/QZWDE2566863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acb8370cd087f2d91e4fcb3318a9c51fad51cda323feaa4f027bcb8183f1928. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:04:00Z), 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/QZWDE2566866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f4bfae6bf95f46e7c8d42392e22060b6b67b4d0d14687265e78bb8ade24db6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWDE2566868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae4019b151e45177e0fff91c64922f6eea54d478cf660f99810897419ce0c17. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZWDE2566873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c3131f9af2a8fa4386008aa6703c95e45ba8c4a6c8eb8c0700c370df6cc3cf. 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/QZWDE2566876.