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 0x3b6dc73dc9aff54cabf865d595a9f221354a54e37cb0b5f4e7002dddd4c76d33. 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/129d45b0-2963-4dc9-b576-070452bf8d82.json and https://artists.proofprofile.net/proofs/artist/129d45b0-2963-4dc9-b576-070452bf8d82.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 0x9a2f976f44beee747fd9be8803e4e6a2536f7a66f7b7bef580fbf988d2362135. 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/QZNWX2238404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b66bc999c555d17c01871cbe729ec5109b61a1ec883fdeb2b4911d5c121ea9. 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/QZNWX2238406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07d85e518f6fad9352751f7ddbbc8ca0fcc7b17acc77afcf4b003d12da6fe6e. 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/QZNWX2238413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b69b47c210840802318e7134d6460ec7141db2dfb6b9fee2455e20b29b2c1f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNWX2238405.
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 0x9d0ca53f4028b186473b356eae15eb85f524a87a4439fee20a7d9d0f7f0bc270. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZNWX2238407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2236f051a529a6ea3bc2c8648acb57ef1a8d0687374cd5eec6742568f718d693. 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/QZNWX2238408.
Do you Only Feel at Peace When your Sleeping?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845030888210ea8c84f47556dc7e2acede47ba49e9d273b355bc8ad11315db5a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZNWX2238412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaca204c4cbc2e797a604da555062f31f7c8a56f80e989f50668d2370b76365. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZNWX2238414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0e739730c3237ec0c9ede651c0607c2ef19e9b4f0d36125671a364fef59e9d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:14:11Z), 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/QT3F52520535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aafe3aee01fc9855424823aaceec7b5a4ffa7a4fe7f237bcd4db5e676062d7. 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/CAUG12300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08637e5ae19c6204fd6ebb292eb5a80f49e744dddb0a2109d78916378fec31b. 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/TCAHM2394220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07bdc5cd6f4f674e4580ebfdf82db3f3b94c59b43e118ec3841b854ed2f6992. 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/TCAHM2394234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62456d313398638248b15fa3094a39d9ec30a2ec3dd149d9f49ef319177c4234. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAHM2394245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac39130494c2bf2cc16ab6802c484ec7d4eb61e1f2c97587611b3a8bd25806fd. 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/TCAHM2394254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90487803a8756353963799a8510f3892db528a0fe67842a445b86e0676732558. 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/TCAHM2394347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4cdcfaf0394267eba8d848ff6690cf60b6eda21704ffac71b8e1cd3b010e37. 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/TCAHM2394355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aafe3aee01fc9855424823aaceec7b5a4ffa7a4fe7f237bcd4db5e676062d7. 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/CAUG12300039.