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 0xcfb69fbbd9fb8c9cc9f353815c88426f751c6ea1023dfa47c5ed28ed0677d478. 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/10ada29d-e70e-4498-b5ff-dc821a332b6f.json and https://artists.proofprofile.net/proofs/artist/10ada29d-e70e-4498-b5ff-dc821a332b6f.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 0x7cae2225af90fa4b19becd03a11388416bc2c54ca130333eace002c490da460a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNWU2249134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f9fbd182b75cbeaf0c0b035eb9a0bf7e151b27d0fa423c1881019e8a15566f. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZHNC2432236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854df1ebd69c8ab1e50fae198e940a01d552f3edf1defe3f9deb3cbbd4d97abe. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:35:48Z), 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/QZTBC2460537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5ea9de4e35a93d850f0547155ac1b37bf39179f8d8bc858006beb782b41b8c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES82580384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055bed87d34a3ef0135364e84a13bc30e1f8f5e320f4621e8c60bf604d856485. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:31:45Z), 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/QZHN62570078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1866d7b2d7530785750bcc4c676fb252cde5f163de764290f12e4f886b546f76. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHN62572715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d92454072f3d2acd0d2e0c1b242be43d1aa43beb08998b4f82bb72796f5c2c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:11:24Z), 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/QZHN62570091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf1dadbaf5ee1ebc51f1ae31693d829d89e9a6f119d2f12cbbe1c1eb78f4a77. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN62593378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806eab06f8e7996cae88c0012e75b51b501dd3194d1c4e0e43a11d391440865d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZHN62572714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe759b1e4c771dfb015ce9e8085cb4c3b5acd001e70d92d69da4ccaec81131a8. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:19:29Z), 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/QZHN62582432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c5b013f475343e4890b0546d5c573822eb15700716e932c0c56a6971fcf91e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZPLR2563902.