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 0x52ed4b661f40fbe2684eaebe81ee4a9c260ba4a1cce82bb06d35a4a3d43d7d15. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/917623b7-33ba-44c5-b465-a9a271193f1a.json and https://artists.proofprofile.net/proofs/artist/917623b7-33ba-44c5-b465-a9a271193f1a.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 0xd42a3f3d8d99707a182bb22ddac5726cab928bdadd2d9908b29299d80abd5bff. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/UKN6K2001701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e361b714cb2ef60899a60204563e3dbdbd98873a66ecbc9a4fb6d6ae2e81da3. 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/UKN6K2001926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22819bce2c9854b6f24c90bb2c00ea17d47f1782420db99abb22cdf9eac7dde3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKN6K2200297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572cfe1f517bbb1d17301db659658867f4c912fba22648a1e7e221ae8321e364. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZZOPM2239728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9dcbec8e4fb82b4c925d535e8fbdc98843f88aef76eb7ae41e7cdcabaa7dde. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/GBRTB2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41724516ab247b33b02cec7268d7e6de6b1b7ae6c2b4fde49b26e6bfedfa009. 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/UKN6K2402399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9368d35beba523e54bd047e0f221b4ea4724e869a442586dbaf04f2c9de792. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:09Z), 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/UKN6K2402398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2991452ee6fa031d02603adc6066fbfc07cfe936b3f5c820f19f022f8b6f27f0. 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/USZXT2351376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b284193be74e3bd658e6c8c6b0e723d55c2964b4a6ccd977fdd2b849b9370f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBCFB2000433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237182a5ff21d93176aa9e24f2bb366c0cb2b4664c16b9c296526aec4d713415. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UKQNV2100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcc111027e346edf47406b20040f5b28aa631b90715b9dfbd14915b76c2882f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKQNV2100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc4fc58fc25fb918bb55c5fc20a656a931e6cc921186b6f6198392a1abdd42f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBHFW2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14ce9e94c65bcbcfe2e3beef765bd6730b0f156a9f689f4f0c1fd6d513c6b31. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UKN6K2201012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c103fa518968f2c81533c16b85dd8962f328bf0e1507699ab78171f50c4e2c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKN6K2002825.