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 0xd88bdd0c0099093305817d7b120a1f2ba2edf94670284799848de12ef7ae841a. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b0efb91-4306-4f01-9c73-317ec8a421da.json and https://artists.proofprofile.net/proofs/artist/2b0efb91-4306-4f01-9c73-317ec8a421da.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 0x53d1ba2463458e5e9426cffee57949d6495dcef9212af32594440b2408d50695. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH0130400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2545bd8911857994290bded0668e388b7e7de7f48dd75967263f57edf47173bf. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:12:24Z), 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/CH0130400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b17a413dd38db620259fe4407f23d77f3984ad35fd808d7f72425af9ec2807e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/CH0130400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68208c3033c1aca099a58237107ede565a147ec92e97ffc40a48bec07ed864c9. 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/CH0130400246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc7ce1b25dfe9516b35e4ac49d07b82b118890fa343cf055caf2588326130f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH0130400248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30f1dca62fedcf470a2a1a21ce6d89daf401c3395fb3b4e756782b226e8ce6c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:00:50Z), 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/CH0130400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66c7589254cf9c9527145cd3a6409bd8118b653f643e31ab612b5eb2ee9c6bc. 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/CH0130400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5312e0382ac3141deeba934941b7a6c7cd24f6f28cca6b74723d0b0235be1bd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CH0130400256.