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 0x9b7ee1069453b57b2a37eacd19a4eca95bb5afe260fd1d4e240db71224499100. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f5f20f0-dbb1-4dcb-8ac9-b886c2c4d505.json and https://artists.proofprofile.net/proofs/artist/0f5f20f0-dbb1-4dcb-8ac9-b886c2c4d505.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 0xbc3b9ca402a69cf3567c9c3890fb3e059c2e914857a48b8de90bbcf3cd12b4f9. 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/HKF601500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a5d5749c705126a1ec823332e41646e0a5248b0154fa7ed7505a1b0fd39bd9. 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/HKF601500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfeacaf6ecde1f4bf0a0611f7707925f29d3b13533aadee7028cb7ad322606e. 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/HKF601500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73c78359fe3651b2a6078ea08825172b927632611098b9937c07e670d7539d4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKF601500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cac2735b8462aca8ee33e9906992c8322e80a607ec12da46fb0e26d404a3652. 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/HKF601500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cb425f35d3454c1f27b06aa19fd18e6b49abcd5b0d0352a35f046f332baa12. 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/HKF601500308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a617ce86e1d5bb5925f9bb8419ea78b2bfabd685c7dbfd4d895dca8fa82436. 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/HKH611900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc355852df4e4fb1f7714b21059de6e56357dce45f0dc5e0fa60f5736e2434a05. 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/HKH611800162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed33b7376cbf2f1e96ee7f4a93f1cd4ecb112c049d994a04f67667d9c9843236. 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/HKH612000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed33b7376cbf2f1e96ee7f4a93f1cd4ecb112c049d994a04f67667d9c9843236. 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/HKH612000003.
Some Things I Keep to Myself Some Things I Share
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e1937c835be0e7e487f4dfc2a11e79f749ea6359b0b58c22d74fea2179812a. 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/HKH611700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23539dd8c955296f61bd90bffbcd81d64b7af8163cb1a13cb9928efb74bf1586. 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/HKH611700154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462b73e06da9baa5f5a2499a033a3e609032091c78fdd1f43a5dbfc8a20941e2. 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/HKH611700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ff530dedd17ba683cda7530803d8ea60d0e6793d5295dd2c4be1c1711d7a22. 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/HKF601500401.