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 0x115a48e18e5bf63edfc32d35bac20ed2ecf60152d8c6277c1844b4c588621a43. 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/bbf9e954-8b4c-456a-ab99-d2db5f8dd867.json and https://artists.proofprofile.net/proofs/artist/bbf9e954-8b4c-456a-ab99-d2db5f8dd867.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 0x62810d98b535d36ea66a9b388fb7f11355b335a56ec12c434175f552c808106b. 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/GBCEN2300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd522ba080617ff4fa9fb43bc32657dccdb552dbd82937034c9145dfbdfb0c681. 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/NL7ZX2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd9f9711e1873bfa163d0028f5292f765ece25a6f76427f19d7300e0b7cc6e9. 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/GBCEN2300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd522ba080617ff4fa9fb43bc32657dccdb552dbd82937034c9145dfbdfb0c681. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/NL7ZX2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca985bb8eed919ed7b856a33cf771be22eec9ec6dbefff21083e4ae8ae43acc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:57:58Z), 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/NL7ZX2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d609132febc81f55669fe71fa0054725bd7f708bc8f0aaa135c9bbc162cacc0. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/NL7ZX2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4d8c011e412e85e68a4c602393054360a4e7880f704b7fd275133975a5a5fe. 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/NL7ZX2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d14bbb93b6e2a8cd5b969bfe240fc8b95b868aafb6580f189beec64ce31a93c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NL7ZX2400010.
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 0xd522ba080617ff4fa9fb43bc32657dccdb552dbd82937034c9145dfbdfb0c681. 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/NL7ZX2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd522ba080617ff4fa9fb43bc32657dccdb552dbd82937034c9145dfbdfb0c681. 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/NL7ZX2200001.
Maria Maria (feat. TECH IT DEEP) - Sped Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4025b0eaf049f8e49063a24600aa0444785381c7191ba1b2042cf7733bdd8713. 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/GBCEN2300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd522ba080617ff4fa9fb43bc32657dccdb552dbd82937034c9145dfbdfb0c681. 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/NL7ZX2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72c96a8101e6d98c1f574778c99a81e5a372cab5f4422520de6e6ea72698382. 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/NL7ZX2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cf3dc497b8c5ec55fc8ad53aec29024e358ff442bec1abeaf7849c69159ea3. 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/NL7ZX2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17a74789cbb735ce4acc04e63678ce5c1fd5ace230434e90a3cd2883e4d3238. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/NL7ZX2200002.