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 0x0bc2d1174f13cb3270f551c3ffef12acfbc79d861d870b5a0534c483ca6b52d9. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa452685-e9ae-4832-bfa5-08314a19531d.json and https://artists.proofprofile.net/proofs/artist/fa452685-e9ae-4832-bfa5-08314a19531d.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 0x6f0e1bbecc7ad2159eef5aa5612746748756a187c2383b90c7cfb50d662ac568. 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/AR57C2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a38d86f976638611ad294e751c88f2f74e034a69fbb401fb2f62ff4d21d682. 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/AR57C2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2442a6682b72f54d303eb36201f008c7944b9960875488c0fcf8aef89d88dca. 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/AR57C2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb850c9f12668afa6174e95be4140279486491c501537233deb7e205adb481ef. 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/AR57C2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe616b112d110679776bc874a137797f8e51ef352d79cfe48d12e3dc3d7919c6a. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/AR57C2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c388590bce8e0ffb3f3a87489cec36632865f545611a286136d61168c83a96. 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/AR57C2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b738761ac84eab888fc9b86525d0b33c88202036c68271aac1f5e063f3a61b3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AR57C2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bdb7a9a4661c76c2e5e8ec4ba51031f4001674ef70a31aca3dd8903f9aad28. 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/AR57C2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4ecf326586108d588fbb925314205a1eb08790542f1e40f60c0ce5077bf67e. 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/AR57C2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa647124fa1f7c45f49ff318ea66415e6565aa2ab4136ccee613b7c18a7040030. 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/AR57C2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e55eec40773e88d7b03918a33ec3cef6183b7e67e55f5b9f07a717fc05f401. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/AR57C2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca3b01ff669b50e6c157666e82d2b8fb7a0c7514e0ed8fccecaadcfec609a0e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AR57C2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f361077609a6d8cc7644e2746183bdd065bfe12e6fab868009444743dc99bf. 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/QMFMG1521364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef6280bb7426eb0d0ce0396a947381f251bc6483f8ae00d4047fa54c37fcf35. 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/QMFMG1521365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b4f89b4e6a830e69e858c18de85a676c81add288b63fa53d139aa05499b423. 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/QMFMG1521366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f3ad4758fa8930343d1209162daf4658cc3e34cb537683349579f9ccba500c. 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/QMFMG1521367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6626bb69d6270d664864a6cfe1b752fe69cd4d865ec669a380c1dc9cfc44eed7. 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/QMFMG1521368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f64b7987a83b668d2507539e09f498ffe73db7b9be3d9a03ac41fdb6edfd9d. 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/QMFMG1521369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ece0b3a70e419f18c3480ed301806e80be4ab73a6a506464dbbb895ced05a1. 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/QMFMG1521370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69307b836e6a983dec565ad49d2fd5de0b72ee4b4535d9961b69a5c8fc8823e8. 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/QMFMG1521371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8af425efa8bce254a765ba218840f4afec7711c5413167bb769a90366c942b9. 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/QMFMG1521372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b16fabf78a67177230a3deb5a5d4724b18a039b4b500263b0998ed7323e774. 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/QMFMG1521373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4547d161dcba143b54bbbae1837e15a02b035c12acea0813c26622d295134c6. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QMFMG1521374.