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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf803c8672e585f1597764e6089d888871571bfbf9126801be12c35111ce87a55. 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/edf5181a-7db1-43f8-acb8-abc3a94e2aac.json and https://artists.proofprofile.net/proofs/artist/edf5181a-7db1-43f8-acb8-abc3a94e2aac.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11274905bb40c7b1b3e8bd170830632fcc076aff0e76797a385928deb8fde42b. 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/HKD012318104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b2d82530515444fbec4430e99a625211de6eeafc552c3ca56f4283b6297052. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/HKD012318097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa793a9bde86f959f0fd95be7313ff2a151496616f42eff2e2e101356ad0435c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HKD012318102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081bf0192f8fceb8c71f9b66305c8f9659dc21b40d18e858d95cd339a5d881c6. 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/HKG731657848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110a74421396d8c99ad01fd92491a61111705743fa073cfc4f8949f60b64b6d0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKG731604401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78de77fbb48833ad470ff3750a4eeb957a36aea0942af07098d45a5d153d53c5. 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/HKG732329968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47deabd84f5f92dc366a58e506ae76207db41c957f1aec88c4b9989acdf8e62. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HKG732327389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144277998c3b718279dc0df7cd54afcf28414b9d95b3098c71c2478e6a4310a7. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/HKG732310343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95dbd37ceb16d98c879416f576ba8e032801cca064285bd50d8d6e91162ea48. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/HKG732286224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3a8d70ff12fb60dd9097d2c67a5a1d5d09ba862dca4174825cde69ca515648. 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/HKG732266321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc5c196087d27ede5eeb468f72a8ba033c4925919c07ce1bfac239bc095989d. 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/HKG732240063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fb39932963ec6294f6e60947e013bd802deabd7ace8943b378babe6ac049c9. 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/HKG732249912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f3b9ba8f8026298d2e3d37aac631a342f386b2244b12d4544713204542e2f6. 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/HKG732269228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc3a676c8f5311d57c26ad1716acf3a27c386ac4027dbfa77110c0436767e6d. 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/HKG732231417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd9e3729bbb679cbd1cce0bbe46d2a47171b6aa3a1cc27a5f15142cc0c45ac6. 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/HKG732308795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499b701e7df74580fb4687622e6b92b61958b345949b7009a97c731f93572f67. 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/HKG732308796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26e3d9a2f0ee2f9094c44832f0cbec5843f02707d7cbe105f97333f0cce7aeb. 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/HKG731651553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd309a6ddc2e059aa0bb99bb0a5519b6ea66ee74a3db01eb1d3402ffd34ae8f1. 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/HKD012369032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110a74421396d8c99ad01fd92491a61111705743fa073cfc4f8949f60b64b6d0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKG731604401.