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 0xa81fd3e8708d7a77a9f56c3a40829e3010f58332c27e8c9ec35a0ca6ce6ac16b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/335273ac-95d7-4ad1-bbdb-86c0dbe74574.json and https://artists.proofprofile.net/proofs/artist/335273ac-95d7-4ad1-bbdb-86c0dbe74574.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 0xea4e50aada4bd7b501a0356703b7995d552f3fb716f2f4808bc7d624e8f78be8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732261931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829d484dbe552ada10107a8d1bd206c17927721465eac8ce4b3848bec751c40e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732122676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e50abdd5a6ac0069f2b293136cdf202fbf149633cd6d4530fae9283e18244b3. 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/HKG732122679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e333a0a2b4f26739d9447596c311c9a219fc1a4031614f432cb7e4da8edc7c5. 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/HKG732122680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6413cbf1bda8b7b6cc66684371ef14de129229fa9a9797395958b889b9e11077. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732122681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21c62f36577105869f4f1d588e86e9772e2cf9e369072aa438e46c0cdcdb9f7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732292601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9820a384ef01294165402a0c7fa847134d108d3e736b06a5bd5ffb4f82e0f5e. 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/HKG732251440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89e1e6baa79fe87ee25a05908772eda48f4d36d9ebed66cec6a780464d79dcd. 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/HKG732261827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c82adb4db4c4eb7e365f66da7d62b94a06429e5f56943f5e1208accb698734. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732302542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bc5d92b49c13f6461cd4fbe7e4b3c11dbcb26cd3a0e4a711dd269995cadcd4. 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/HKG732101539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca9fcec86fb5a5ebe453c814a512a3903bd676fc0af3130b8dc18ed1fa96bb2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732131195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51ff02974baf7d112cf7c8def32d3030e7938f43c9f34d9ca6fc327205cea2d. 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/HKG732029487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d9ccaaf03b2c5908ed1af3669277c4aeef7d6e6ce84f103c094a49e48d44ef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732024963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320119b92b28356b4d461411631fc4dfa7df8573f62d6e10d573439857210321. 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/HKG732012929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddaefbdd0f01813b4a3aa2982bef5c22a68392dca22c93f7b0bf1fb12d640e4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732302588.