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 0x60b4597b4d5d905a9f1cb3310021ab9f85f745593548358b5002e0fe64fbc7e4. 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/eeaeb648-e241-48ea-9e8b-e8b7e82c7167.json and https://artists.proofprofile.net/proofs/artist/eeaeb648-e241-48ea-9e8b-e8b7e82c7167.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 0x0883bc21b4d4d18c027d143a499c25a0ea974e4674a3fe9767a95db883c92877. 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/ES75E2402473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e250cb34036bd2c15485400c022a841b075201516c3ad9cdc4ee9f8da54bd7c. 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/TCAFX2185005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d5b75e7204e14e3a73633c14658491772636d5e1acea1f10d2d002dadfef4d. 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/USWL12300129.
Nos Miran (feat. Eiby, Verzatyl & Italian Somali)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb548e70c7c1eba970d5c4ad2fe733dd1fe4d355bb0a44d791121ac8fad504b92. 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/USWL12200493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda213a5d9f5a9d22d20febccd94c4d5cac27f4cb943b5d308f4d41fb32926195. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USUM72214740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbf50aef6f1ebdc9437e820f72c9aa77ffd096b97829e671f4f78f879d85be0. 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/BK4DA2313858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2250123a07fea0a609af81085dc9645039000d6b4ca17f9c65c9fc7be39a6af. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:26:05Z), 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/TCAFY2111802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce4478f8df8ac8bc93f06ce20c4fcf8609304262118f13289d58072b28d8c36. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:33:22Z), 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/GBLFP2179651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ec230112c0f6fa9f04118d870489e68a940360c1b0498a2c6b70984f258487. 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/GBLFP2159191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7768f99dfe8c3f096726a451d643ef1062a24add6e15f1b23bb0cf4bbb494e69. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBZB51900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1dc4cd1ee16b7363b0ddaad05c54623a6c88451e5a576e07a3b10964d16aac. 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/QZDA72326934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb53f48a149ed37f418645da7bb4d8756347aa92792edd6a0316524aa20c7fdb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWT2146895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b4e80459f5c9284569389eeeec9dcfec9616bd4998f1e8a3f2dcb7d7a1b50c. 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/QZN882514467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c9b97fe98fe720b33f3393ea5788a8e3e6e12cf2faf0bfa1e6bc50c1566b5b. 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/QZN882514468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7298e5cd39f8ca556605d94fcae3682e3cd0297016d32bd19d24ab39e5b388cc. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZNWT2259195.
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 0x08ea4d013c7a69991f2ec06d034d613ad9a13f24a24e2e3d8a326b35cc900ab5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBMA22401348.