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 0x0f11d456d821686e4335958d745f759e0d729777611f19e752cdaddf6dfd033a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a89e9064-7390-4371-a7f6-78a2daf6ac25.json and https://artists.proofprofile.net/proofs/artist/a89e9064-7390-4371-a7f6-78a2daf6ac25.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 0x53287fd1d9b5be9a8e935e57ee4eb8b38bf7f70c643052fef7f3f6bd75b15aaa. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/DELJ81821366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34326fb1455b0477ad81c154e10894ca53e6aecd8e18dcc4876328d296254caa. 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/DELJ81821368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dc558af3b09b6acaf474c1da1a3a25d2dbf64924f3058403f06839a0edfc06. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DELJ81916451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc6b1d7964266a4aee851afd2d6b3ae916cea44bf47d6e35e3fddcee79aeb2c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:02Z), 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/DELJ81916453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ad177151fdd1ecb5ad836e42eca8ec261c92b57ac34cc137619fc8081b9fa9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DELJ81972282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c0da11a6567103987d2d40e896d833df99c710dd2583f76a9cbb9ba6257a2c. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:53:37Z), 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/DELJ81972283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efb466cc2793026b2ca4dd8c2bba5a9e5ac2de82f5344697812cda4a32c6e36. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DELJ81972285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a11b3bfb145343b75edc8f8607786da88100ba29ae0a7070c65f9b8e6c65a1. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DELJ81972293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ab3be55234c4395616ba38f11a5a530c69e9207e67ad09065d2343d6caff90. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:46:51Z), 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/DECE72000432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749760656aa85b9a5d41b4a4dc82ed11115f655ef8c23f685addfbd97ed26d34. 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/DECE72000433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b062b2fb14135bad2e98580ff8c0ab947df25c124ec783b84a1ad814580b94. 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/DECE72000437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c7b020b93c96aa20b30c917edec4bc566dc1634ba703afe72e2f0f21050862. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DECE72003987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd95452ffa052263ae64baa67a974cfee94fc516080753aa72fd1f3c0614d510. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:08:07Z), 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/DEZC62116813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b18360ac0548089ed5566ceaf8b7faccaa45755452afaea8aee7f230323a0b. 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/DEZC62319801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d20c0fc5118ef01a90708a7a0ac3f3270f9d1fa0c47ca7d97d5ae6c3f69c84a. 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/DEQ022281384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0f5a72cecc2a8775c9ec11a0e59f9877547f89fe1b389bbb0f19261683a388. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/DELJ81971592.
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 0x1ad2089437d6bca9a30e489f9565846a1bd06e6ce39e9833d73bd3ea2bb5233f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DELJ82047728.