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 0x8d6ec1426e954ea0eb6042c04885eae7e532d7eb56156a3032e3b015a89cfca7. 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/a51190ad-faf7-406c-8dce-925f2b75db98.json and https://artists.proofprofile.net/proofs/artist/a51190ad-faf7-406c-8dce-925f2b75db98.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 0x25516a0bfc57b35af2c9eae1145b4ad88113996c918b796b7f37c5ce689113bb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARF050500516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac56580b309bb7c72abe3fcb978f365bc7fc40fdf7fc687e5b82d46aab13b0c2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ARF050500517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea1651a9dd2c80e67095883828ca07f1911fbc77b9cf9ca79394ef39dd25abb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARF050500525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f4b4cf53081283f46d27de63bc2c237e21d7052b34940dcc6d812fd91d6384. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ARF050500939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08a127bec41b2da7e41dd9a2bbe71f3e71bcf0214e64edf7a795191d7cc7b33. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARF050500940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc1dbcdfa91a2117f1ed73083ebbb655fbea94ade5d02c588c2cbda560505af. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:34:19Z), 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/ARF050500941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa086f63248dfbee4abff2859cae011474fb105962cd3ed34608981b019228dea. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARA590802241.
El Negro y Sus Cometas: Lo Pyor del Rock Naciomal
Vieja y Empleado Público / Vieja en el Bondi y Dos Negros en la Esquina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386611c3fc9fe454ef2cada7363033f7271d4e3b1714bd8b525cb21d36bda78d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/ART721310058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef9a4b8391eda86669715ba7db0f12f36c8ffc425e5762a05fd95641bed13c2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ART721310049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e8ef6a20b752801047effda650928b1343ed44abba41e82c4e6789b7526342. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ART721310079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39371294a43f69015610d6a65552ceb46b686c839e0305ac1c6199af53f4d6c4. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ART721310094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae550cb69848f0d7ad7cd5f387b20dc2404e08bf43a8dd54a8c27b05224c73e. 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/US3DF2029543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2233f4a7c33168b76da87e424f48ae583d32ccf4ec6341dd8b34d41536510a32. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM7281530601.
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