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 0x1256d99dda900d29cf0ec75f36ac9bf77326a84a1782fe2be3bf437869fb398f. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d15847e8-95b7-42a8-9e8e-5dbbc8f7dd02.json and https://artists.proofprofile.net/proofs/artist/d15847e8-95b7-42a8-9e8e-5dbbc8f7dd02.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 0x0bffa516d8328e20f6c3f48359c61cf561fee4f9cab0297ea88dc51c4d982e10. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NLCK42235672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9d7ecbd48dc14dd7b5873025d593efa23d8038731e2198c18965f176ac40e0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLCK42235669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb320b3afe76bf3e9fd1332e8842da78802ac84af8ac91879a23de410c2a0b8. 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/NLCK42235774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085268b6a1a89a3f748602797617bd2104dbf8052df2dd2cd6e4910c68973bbf. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLCK42235973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab25383ff77826dd7702be7fe0752818390d166d2af170aad4c1be4fa25a0bb9. 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/NLCK42235974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaf441a44c20b6c445c9396950b23a61ebec51665d0d8b1736a456e8b9dbf2c. 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/NLCK42235975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc7228cd7c5937a8dc5a32f0e86131b3b366deebbdf56c7235145ef03cd5f8f. 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/NLCK42235977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9aa75c91afdada8c9f26123e47134742fecdb2731aeec49878ce5c8d939a71. 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/NLCK42235670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296eec401c07d837f7ad6dc6440cbc29f20f2dad94065ff3500b2f1379ee9da5. 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/NLCK42235978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb6572ff1a92c64e6b3d0f1497010e4a92f02bebe54eb1de0793c726f69da83. 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/NLCK42235979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b74569a767c06483186887415afec9fa9089031a1d8ea0d3a21e51ce91d297. 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/NLCK42235980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f0365df2cb7fb4543f01312b12c003aeae3611471b0877f6dad0426318b3f3. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NLCK42235981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb809de4c58a4032d5f392c2a1985594ede9a5a870023434d173aaffa91099b7c. 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/NLCK42235982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606638ae59548e9260f91ff30720f4027091be5977ffbee2040e134c4776d234. 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/NLCK42235671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1a92a57b22ba336ea76857f04eb38ed3e97330656e01d19135257266187564. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/NLCK42235984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085268b6a1a89a3f748602797617bd2104dbf8052df2dd2cd6e4910c68973bbf. 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/NLCK42235973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bfad0d255896b9452abf4be634c28036f602716660fc2fd0a1fc31980eab9c. 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/AUCN32200193.