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 0x4eee5bc0455388dbcd560b7868d768ff5b1e25979b26ae9453f954e9678bd404. 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/681e5df4-47a4-40d1-a8ff-ed07892b3cbb.json and https://artists.proofprofile.net/proofs/artist/681e5df4-47a4-40d1-a8ff-ed07892b3cbb.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 0xe1e31335caeef43008b0900434ab46222aa5adcdb6af790d75fec6433c566fa9. 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/NLEH52100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8818f5e47053018e2e90ba56d43767a05a93244bad38685d852d4438b82a5f. 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/DEXA52400002.
You Are Home (Live at De Tempel Amsterdam)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b2989cf83030a7e3628f690a7a19ff75dddac17ff4d834c3409d650d809b40. 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/DEXA51800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd757837fb297cf038916c939b7a91fd0d52dedea780671e5fcd5e564d798f4. 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/NLEH52100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde43ebd9436decab06389306a2ee65d73b75d5aa4fc4903ad58afa1fd29186e1. 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/NLEH52100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa56cabad6e153da056779b0e3be4c9618bd9d6d258ad9631496ca0317a1d49. 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/NLEH52100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c651cd306a1eee49308c713d32d7202ef345bbc25874824c34a8559eb097684. 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/NLEH52100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd590aa82e2bf13f5b078a85b0e74d47b1b94bb2c09c274814745e2d225cb717c. 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/NLEH52100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840be10e16796f8451d3aca064401fc02b387135699d71c1771708d022269163. 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/NLEH52100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415691051b8d3dbc580507e155747be6b802259914557944988d05dc177b121a. 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/NLEH52100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44746dc106f9b3b8cbf4619f8522a92abdd0776ec6beed74a3f11d2761c9e5b3. 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/NLEH52100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423124fc92388da57302ec2d05fc9c4b166636e743ca7f61a0bf6fffdd60010e. 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/NLEH52100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61aa5dbadb2318009446d3d298c1bed985e79b3b464f63222dce4239c61c676. 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/NLEH52100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226e23affa3248af0c153ee5c12bd6f0659004a53ebb89fe0606d4ae941d04b3. 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/NLEH52100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60259851feddbdac8e7556569e71ec854bb00a1c6289af33e2966e14492531eb. 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/NLEH52100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e82e611a999217eafcde6ce2b983723d60ff9c4879c519d5b0c3987513d11e. 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/NLEH52100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9581c8a72a306c4f0ccb6722bd8ff5c44bd834e29b319c0713206f52ab50e766. 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/NLEH52100023.