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 0xc6396309aa30cc67cca752ebf9ddf4c81981814b5e148e2244e96dd0f04a673e. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6997a69b-738d-4a4a-be28-a16dd57b4636.json and https://artists.proofprofile.net/proofs/artist/6997a69b-738d-4a4a-be28-a16dd57b4636.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 0x168bbaf8ff3378d1c263b4bf804b789cfc5655173c04eda6cef8f0b4d29f5dd2. 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/PLC062011157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64a4798010019a3a7c0b97c4adf6d77c50c9634ba7d9db6c2ca7a83700e5e96. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLC062011791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e3f94cb49393d808cd2d50771499a85e85ebb78d918a260292e260151f6130. 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/PLC062011709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fc2ff3aad5376a93f0931c362f1717d9fb96954da3350bc930cd24d86767c4. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/PLC062011459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dd066ac7305835a01b6c09982f739202e7b56142810af57f86a02f44bd1d98. 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/PLC062011836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c2ccee2d83b5d94a5c49a7d829fa6ea5648a23b5fb2d1817d35ffb405a9a7a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/PLC062011837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b1ae6d9c66b64c91d51a8aaeb504d39333a1157329ccb16b2ba1f8718c1719. 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/PLC062011838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf077b571a9eb9d42e181d3b71cdbe11f976be82a9ee4a0beadca637344a26e45. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLC062011839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61d578a6560334781e64d09b72653259e914aee02f9a723ff24a11a1d33f8af. 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/PLC062011840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50df74ced35aaeedb871c1c500ad4415016efba36026799895ff5867a2eb588. 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/PLC062011269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847e0a41a161dd8acb15d021f14ad4e01041b64a1714c35a5730bea8d4f85576. 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/PLC062011842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dd066ac7305835a01b6c09982f739202e7b56142810af57f86a02f44bd1d98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLC062011836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b1ae6d9c66b64c91d51a8aaeb504d39333a1157329ccb16b2ba1f8718c1719. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/PLC062011838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64a4798010019a3a7c0b97c4adf6d77c50c9634ba7d9db6c2ca7a83700e5e96. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/PLC062011791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e3f94cb49393d808cd2d50771499a85e85ebb78d918a260292e260151f6130. 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/PLC062011709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fc2ff3aad5376a93f0931c362f1717d9fb96954da3350bc930cd24d86767c4. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/PLC062011459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50df74ced35aaeedb871c1c500ad4415016efba36026799895ff5867a2eb588. 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/PLC062011269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168bbaf8ff3378d1c263b4bf804b789cfc5655173c04eda6cef8f0b4d29f5dd2. 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/PLC062011157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4ff99477cfaeb7594cfab3dff8391560a9cadfa4339b021b30c2f66e10ce83. 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/PLT612180011.