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 0xb911f9faac100e54064cc3f080fb4d6bd990a98261f7a361b8aa6d5cb62e048e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/016f2688-e641-44d6-9c4f-462b3b2ec855.json and https://artists.proofprofile.net/proofs/artist/016f2688-e641-44d6-9c4f-462b3b2ec855.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 0xa4e5c176b0a99f082142ef9141d42975f7f75c74dca98ac99b07f052a9d3c5bf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7Q2448422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cd6e49cbcd0f02099f844db856493d280e0c965e212a329eeb1785014e98dc. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZZ7Q2448408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75b9c8d9bd373dbc01fb567c64b252ff11c900dfe465394b840217be12ce432. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZZ7Q2448409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340dc08649d88e6175d9e82b9afc9ecd740e741f84f85a4c6a73834af1e15d1b. 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/QZZ7Q2448410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb780d691fca4b00a4cebec8c2668d229f33e647b7d86712c9d57a97def19caf6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZZ7Q2448412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6742d94a42e277bc3d28b7b1eaf12712b04ca3af3ba4eb4135e3ad451f01b41. 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/QT3EX2490169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fe7618e6bcaee6b0a1cc9dacd49d2d81139c5c2e77cfa4fb6e3ca9196a42b8. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QT3EX2490171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b03cc5c0941020c0297d918f36c90a3518455173944e7e96891b44246640c8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3EZ2453117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fe4d9ca8894553efaa17c6705bab00c99d14bb53c189fcb5f9a44babe8caf0. 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/QT3EZ2453118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e5f118f12bc9d7f4fa322998b8429699be52aaf710b45ad93011446983b655. 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/QZFYZ2567551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dd5187478addab277795fd26838fe9fc8d52dbd2a9581eaac603d8c1f058ab. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:11Z), 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/QZFYZ2567552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6bcfb49f8f341dba1c0787137a489ba0e39d9aba8a1b593b18d13faf9828cb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:46:37Z), 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/QZFYZ2567553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6284f182ccc24ff56525a635bb1770d2c5693be5022ef1bd28bc140406cc97. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFYZ2567554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3cff16ac09c6c431b07619fd43a8ed56359e1c2ad79f8abdd8cfcde739845f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYZ2567555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668a13a7ff38dda75491a757400331de0e3c7f9729bb909fe6eac615ae451715. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYZ2567556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcdf69ed8788453c32604da178ebffb8dd27baaf7f66303f9fde0c810abad30. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFYZ2567557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255ae2a9be3bdef1c54d928a6d64d9e340fca3037c169100e4bd9cd76eaa15e7. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:51:06Z), 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/QZFYZ2567558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0040a4f618927224248b5c37ee3cca16ad16793a3aedcde4084003a718f8f5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:03:59Z), 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/QZFYZ2567559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aae3f891eac78bccd05a5053ecbf03dcabe6336b1d06fb2365023601ed0532. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYZ2567560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941a6277ea1bfadeb6900402565ef59237bb6b911dd4d873d2c96a5c9940a7a4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYZ2567561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918a9d1bbcd99557479d5ed7efba35b854fd2d3ec4b5a2c251a44faa7f9d833d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYZ2567562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f815f9e7c88f4f77502b7c0e5a67d58769902209c30fc62a62103288346a216. 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/QZFYZ2567563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db1cc2de3536b508ea34d50e7503b33c2c4c3ea34646c8fdbbc5757baaa894a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFYZ2567564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bae50651ad3c2db79832664c2f6698518c972f50d0ce2501b7f719956b17e8d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZFYZ2567565.