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 0xbf3bb3b008994cb962aca4fbe5ced9d0658e3a276478f0641f6ac021126b7c07. 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/099afc76-0407-46ff-bf92-94c9270e7240.json and https://artists.proofprofile.net/proofs/artist/099afc76-0407-46ff-bf92-94c9270e7240.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 0x14575c11f6ee97eaec00169f208f4cc122f899b9406888947f5ff8ae858ab2a3. 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/QM7282321158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc70daa3d11fd01987a76503a1b9dbe29df4bcfe30c06fbd7ecb1509b392712. 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/QM7282321168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f288118151ca8f25c4bbfc86af8185c3d90e469d25866eb09187e042b5f0c5. 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/QM7282321162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9088b1ca0d796f9497075e1209b2fb2691e3ceaa2da5a42ee5bb9492b4c296. 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/QM7282321164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62092312b2a3de21792bc7d293c625fe8b9cd917f92e8f4a32a616fc6299ba42. 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/QM7282321165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821100b376043f9eae236527fbf363a74602f916a5fcd217133306a81a7125ed. 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/QM7282321166.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1eb1855d1e66416faa798559091218f47643b0433926140c9e3513d6574fa6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:18:28Z), 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/QM7282321167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6033e620f84a87556a2ec2aece1f546e983c65e999628f123724f5b8ba25cb9c. 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/QM7282321170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a95acfe98bff9f9c75fc67f52e24d7633bb2a1c9e8f4587b5b62bdb638c3c2. 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/ESA012132227.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c85b27a72717716cbf4c5632a1ef43e4ccc7f7eb091b71c3c204c490919adb. 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/QMDA62457469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11902e1d03f4b8d2e65a26ec0c86f4a37ea489c687b10c601bdb848634084d2. 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/QMBZ92465546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723ec67bd8311b3a30bc17b2c5f1ab566fe90b3ec58493939593f1e15a2c05f4. 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/QMDA62457471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307a54acd98703861f37fb3e21b2bc3547f74526082333652080176f8280454b. 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/QMDA62457472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11902e1d03f4b8d2e65a26ec0c86f4a37ea489c687b10c601bdb848634084d2. 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/QMBZ92465546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a82811efab5f6aed21b4bb35fc82bfec23ac627d802edcdc302a4982cc3585. 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/ESA012144340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8479cb36e745a1ca440c3bf0e351c7edeec940106af776871ba50af123b7088. 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/ESA011872542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357a10efe31848cc4867f6b701cd0e372e5ad4363a1ed1e11b035c271db8d6be. 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/QZZ7Q2400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6798893ed65c8dda4d739391fcc076d0100dcb785e14848815198ff99a423b56. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:21:29Z), 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/QZHN62523561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5992d2a75481558ddc3c351a7cfa31564907b327ed416bd2515db36533b928e4. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZHN62523562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f6cb14e5d8ab8a4a0a15c61a1f9167f5d927f48db40e17f35d3dbc985fe10f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZDA42571173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcae964e13ae841cc20e239b660dd615c0f5efd50b6cf451b3fd3f226802e333. 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/QZHN62523563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c208adae9cefe92124a3415068c074adc921be7fc1aed3f7b88fb4d4f89635. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN62523566.