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 0xf7ebaa42f4eea2725d1c8640e7b7d36a4d4386dfd16205edaf21293cac3fd4e4. 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/95283ac3-ac39-48b9-9209-b8448bf7dd02.json and https://artists.proofprofile.net/proofs/artist/95283ac3-ac39-48b9-9209-b8448bf7dd02.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 0x95d4b1595c01b49d14c6ee5aed3a114d917a63bbaac2be4dd9f6712a8444277e. 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/MXUM62300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc757a301f5ad0fbfd0dc9a6dcb6a9048b4fb07398bbc7e908ed68a9c3b494acd. 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/MXUM62200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e10c4dee3532e3455dbacaf906aced228287a0a3ff6e7dbc868c14547b8dc6. 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/SE5752238331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9139b446d547dfed32f3480517e0f51c2311281b25fe5e5fd7f0414f1d34b43. 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/SE6QE2185527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0064920d2bfc3c841c0517ec9a7f7295ac785b71f5815088f45f47058e86e8f5. 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/QZS7J2321774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ddc78856c41a588073118e96aa55bd1b7e7ec1276def262210d661b8e2f412. 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/QMEU32417446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0513ce38eea7f8c6fe150483b88988dcd0b320c2c74173fb64b68072c2e5a6. 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/QM6P42204546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53635618ce5f8bbfa5c984a5ac54aded0754dd15c02ba5d26c34d8cd2c063d3. 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/QZS7J2380141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8651f72d900068939bb7a0d0f6bd2da0b4e8c3dee96dc7c5aefdad1fb14e1f6. 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/QZS7J2353920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9e53cb08f5c5394071143a37718d5f253c4d50fafdc2a8d16e0e30d0327028. 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/QZS7J2314723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc241af0352f2d07fac6134b137ad90e02e17d8dd2462ea7f28a053d8816a41ca. 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/QZS7J2385137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5148bb9132bbb97d82b22e346d4838b9c129e28ef9ba9e3c64fade4af2a7178d. 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/QZS7J2301830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2c80104ceb18af890a7cdb98ff9ad7f2aa0583e1cba69cb7a66ab2a3efa4d6. 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/QZS7J2349155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0064920d2bfc3c841c0517ec9a7f7295ac785b71f5815088f45f47058e86e8f5. 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/QZS7J2321774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539902a05d413dcedbbed4032180ae6f6f8a75c0524a2243685364b4994cd2ab. 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/MXUM62400221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8651f72d900068939bb7a0d0f6bd2da0b4e8c3dee96dc7c5aefdad1fb14e1f6. 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/QZS7J2353920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f24f53b5bb0dbcdf177abeb3247f6510778c3d73e381f8560756b9ceac61fc. 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/QZS7J2370942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc050850792b363f83a62aba0c534ca78469173f523770798b898e2f1e307a06. 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/SE5752198809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f76b08b429dde08b369fc34e5056d483eab9386848d9a247a771c6976794422. 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/USUM72402945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa011303210a2587304c29819de77f610f2afa35fb32396cda7c148a41f8f9322. 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/USUM72407430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fae7baebe876fcf12c2a10412a1c8ddb1db9e3724e26d63abc6c4c2c9a34fb7. 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/USUM72407668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c2a555278d68f541264c6b27c4fa6096a147e9359c7253f80a88ac4154d40d. 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/USUM72405694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b66672e6af694e1f1524decae0de21328f22b2f773086f7884185be17b78de. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USUM72405188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ef8278f6c894cb3f2c2a179ca252b8bfc3da1cd81d946dab4f4983cea978ec. 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/USUM72407700.