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 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 0x5dbd0b90e9944ff4140a3b580aaad0a815fd1b110f858ffed7330fe0997911d1. 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/bec0f671-1b3f-487f-862e-9b33cc20c07c.json and https://artists.proofprofile.net/proofs/artist/bec0f671-1b3f-487f-862e-9b33cc20c07c.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 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 0x0b543ceb0de021a3987e11c65df8087fa0583d47082ddbec0f16785182adffa8. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/US3DF1405320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdde7e9e328aead1b8fb4998b4502130f6a74ccc2850881630e15b698990f7c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US3DF1405327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b543ceb0de021a3987e11c65df8087fa0583d47082ddbec0f16785182adffa8. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/US3DF1405320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993763e4c32af6283bcb710b16d4ca56cd7e9afdf882b9220e5f509f24f7d283. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/US3DF1405321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8366c668a3c489b5b6c5dbbf31f3d8d2282abbd4891a5e5d6b5de6927945ca1. 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/US3DF1405322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7c1a96ce91a63f1b5ccb6b1f93c59edbc8795ab753677080aea4b9da23fe17. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/US3DF1405324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdde7e9e328aead1b8fb4998b4502130f6a74ccc2850881630e15b698990f7c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US3DF1405327.
La Mujer De Los Dos (feat. Martin Juarez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8eb207ba3e5cf3154f01a8093f101b3f60800b8bcbffdd9fcfd03962dcca2e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USBAE1793682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846017611edc0cc59027449d4bc611e2b0de5df895abeb9abccfe53f33dcc766. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USBAE1793684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2971425c236c3fb8e944608b145a0c9d7415ba3447bde30a16ee0a241f3e0f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USBAE1793685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae513b89485e64359b4448294f4729bd54a3afa39a85724b7e4c23219b850b95. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US7VG2213442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2ba31620c56f773b76447d567f5e33579cdd37ed68f405c7b232b28dc9b9fe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US7VG2213870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc58b6531da7da1339d3ad91ff857cc302e09ed6a1431ce34caa4544b87b0272. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/GBLFP2217210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9df421357479cdacbff143dc8af863e1afb3590d82e128a6e12725f8105847. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/UKXN22205089.