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 0xd312ef6209275db3228169df91738cf21e0fdc2a1bce4adbc356080489227013. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c90ad473-531b-4c30-a2c9-4f8905628bb5.json and https://artists.proofprofile.net/proofs/artist/c90ad473-531b-4c30-a2c9-4f8905628bb5.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 0x77d92bc94c43b272327bcfd8684249c6b7d09dd8d0c7a5c7c2f5c68f41c48b7f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:49:33Z), 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/QZDA82159960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc703f8266424ea8618f767624fe5018d92b4d66a0bc72b29ba5a1fd88a0bc76e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZES82134635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66c77a047d1dd9be89845fe4732b0c4a524850d7b6a81e1e83e07276d60a7e2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:06Z), 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/QZNWT2158380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac47d21bbd92cba370ed278df34c67c4f27298a563cb52bbdb0190cd4ba406b9. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZRP42196371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328842a69f60332a4812127f56c4fe19a568b5057475ebcfc6e00ff214b2997e. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:05:58Z), 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/QZRP42192712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9261f988d49e6b364ec044b4ae1c37c6bf44e62592e3ad93e6f1538124e667. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZFZ32265103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ded8ab2d9be7c7aa94f8a478abaf9b32ee8147fa88fa9f2ff000156110bb31f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZHN42275628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0072ba130a13abb916aa96a753c2d942d43b6acab186c875cb79bc63926a0836. 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/AUMEV2511276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9518530d668f2e9c4c8fc3174cfbd43d4f6a46889cdb2168314332d72a6424d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USRC12202483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9518530d668f2e9c4c8fc3174cfbd43d4f6a46889cdb2168314332d72a6424d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USRC12202483.