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 0x02df2cf66c752a736529149f96c3adb0b8cf4cda22d4923cbce1c84742688e7b. 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/c84c8697-cc97-4566-bca4-50398ed286bc.json and https://artists.proofprofile.net/proofs/artist/c84c8697-cc97-4566-bca4-50398ed286bc.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 0x8c7683f78c2784bb6e362b8ae658e0fb7ac582e9b792fcc4c7a284a91ec73455. 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/QM6P42364412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037dd3277301e40a00cce4908a13b6c00971ca6e0665718061ddd58be22af742. 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/QM6P42367714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c66089ebdc65281c3caed2ef38735551b13a4a194c6b6ae10d3873d7ff2525. 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/ITFGO2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76baed0b42e2f2e163bd61549cb1ed6f7b639c721f392dd01ab6e3cd3d30a21c. 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/DEY472474575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45e5f16c335d82a109ed7e393ffb69c3dc51147ad9e090dcfb858a1c6eb39f0. 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/DEY472474576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47100a16b9b046a1cf6ab055db13785ae25401471bd3a93296fba02cb563e461. 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/BXBK62400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b2c0e1c11a20b3b713cec01931aeab4b9466d3778639a62d354cadc93e3039. 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/BXBK62400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47100a16b9b046a1cf6ab055db13785ae25401471bd3a93296fba02cb563e461. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:07:23Z), 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/BXBK62400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b2f1daabdc3120444e9933bb5bcaab41b7def82a56d2b530730b1c4921a23d. 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/BXBK62400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cdbbf2899ded170043e259268802510decac899acca679894c7681c25ddbec. 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/NL8RL2406801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49fe8e589643cd57b3d192c563dde961dfa4533a5e19e48500984c2afab2681. 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/NL8RL2406802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6367add4598baf1339b0dd389cab05a539cf577023d58a7f7528a012b4217f. 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/DEPX42400684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800cea5d11d0ba5a67f4865c90037ea2ab999c637c33e90034ae16c1740e2f66. 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/ITFGO2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d26a935a52b2efb9099a9033825fa0531a42a3010a60b956eb7e82bd32c52e. 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/ITFGO2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e74c397db8609e0c57be1c67fb60ad5ac5ee46f2a9bd59dbd82a994d1389647. 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/ITFGO2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5791948865ed0001b472cfac3d90511d9354417c67e54e14c8b7afbea7437cf4. 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/DEXO12375063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edd532e2c7679695e39b8370e3f9fabd2443c2ff355d39c6d53a1c6d1ec1f25. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEXO12375064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e705c6949aaee3ac7748b200d980aac43a2754e0e5479e75a22077774338f6a. 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/NLHR22290070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642f01d3ca20aa9a3284cd2715add37da22f1189c92120d0213027c1738fe18e. 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/DEXO12385348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9d31c4e61eb06785aaef33f18478f6c1a3d8dec761fbe562b42199ca485670. 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/DEXO12385349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407c974fffeda4de1de81c76b50b098e05b9e79246f0f2c2dd6593653ef80a9b. 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/NLZ542301183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433fbc3e681f424cb8f13cd0fc672524d440dc62d6cf887b03e93bc2ed9fe507. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:15:07Z), 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/DEXN92376407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1c1d76ac2683afb1327c7020ab99d8e3de8b7ab66bfd166c83a4aee0c6de49. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEXN92376408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005e8ba3679f2d5b646c1373260cf22d23cc53f4072de99395323fda3b5b8542. 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/CH3132317756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dacf5782dea7271db22d97be6dd9d57aaf0d6b4b9d88eafb3b5ce208026a2db. 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/CH3132317758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c69c650e4ce5c49bce66553bc586e192fd4b13dd36ffd1171323a269f9b654. 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/QMBZ92338623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23e6c80d21e98dc58e488f48b07fdcabae5dca7a667cc52d1e378077bdc574e. 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/QMBZ92338624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274a969a031356d10f6b79f504b9d75c7de0e21e97a5a1a90fbfae093e673647. 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/QM6P42393570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc067800677daa9a358c4c798aac743c3b158b868911e204d949370a17ffe1de0. 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/QMBZ92338626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458280c1cd700cdb595fab64d70c9a54f8129591547aeab5cda5debb6c63efbf. 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/QM6P42387857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274a969a031356d10f6b79f504b9d75c7de0e21e97a5a1a90fbfae093e673647. 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/QM6P42393570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458280c1cd700cdb595fab64d70c9a54f8129591547aeab5cda5debb6c63efbf. 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/QM6P42387857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfe84af951330cb168789021a0741c5899b525e5b47d6c916baca43105cd10a. 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/CH3132217533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d6f6ebb7f53afcc078ef647645d4e8f36aec904cd84860c49a3e411cb6853b. 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/DEH742305307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5977c645c1445c37cf30bccb0cbb2b84604a7271e36db5ae12ad49b3e405c1. 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/DEH742303018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2139071618a8cf0d4b6b3a8cca839c74d5d8ab40019ae3c7211f8b40c346c3e2. 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/DEDH72300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dab3e763b8624b79c2e9fb1cc03e054a80a2244b22a2e64dd0a98876e261342. 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/US83Z2217442.
Dekline (Matan Caspi / Torsten Fassbender Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90320e6d92ea8b4006c64f1e01f6af9a9a60e6d30fb93444ee275191dd357d4. 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/GBJAJ2000529.