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 0x75413ace7a5fb841334f400a52be8befd139a3c3702579ee7d5b7c7629db7a90. 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/78059e06-07a4-48d7-98be-41c91bd8efb0.json and https://artists.proofprofile.net/proofs/artist/78059e06-07a4-48d7-98be-41c91bd8efb0.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 0x466a43d5a3c1235c2be73ad4042adf59dc1c44c5980fa96267060c858c4f337c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:41:52Z), 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/USI4R1127256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f74f4b93b955e5d073a645722617da57c6791bcea703cfa40af8c79f7871d2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:43Z), 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/QM4TX1595237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9baa6a50e6f95bd06e788c35fbe7552e50913fd075886c531068a402b5e19b2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM4TX1595238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dea75c2591073433e3e7b1bd65724add7a70062a7e067b8170be64516d701d. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QM6MZ1755969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdbf6e743365dc28098fb96ad0f8212fcf8e11f0252ce4ce00c5028501aa0b3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:19:01Z), 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/QM6MZ1755971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866ae7b7e9ef811e28c29b8112f72a3dde7273b2c2bec27c7b345b22e156ebd0. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/QM6MZ1755972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dd42bbfd187be25b9d4e1c86eac856b785fdd5857c4b100e039394cbb4424a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6MZ1755973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77199121c5fc7f58c4febae40f6c0de223748f6a02a8bd0fb861feb3d9078656. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM6MZ1755974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bad2fa97c707cd0e99a73e39a4b10221b99731e1dd50624e8b78eb0ac6eab2e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM6MZ1755975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894bd55acd0337f07f590ac2ef4bf889f78aaee4e42abd751c51298c8a66955c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6MZ1755976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de31fa557b323174dce26b38b41d3f3c5ade28eb1dbb39439b4498716bb73ad. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6MZ1755977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb61332a9c7509c29a33b39c8c7124d3cf77ebf39690e016e4934434d5e89c9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBHLW2004352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd565997e60fdafc3d98de85f26b49766d9a4c3f37bb1dc065fd1aa537a357b59. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:35:30Z), 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/GBHLW2004353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6975e076728b19862ce13eec80bff06736214478fe7df4fc3ee92ff3db7b7891. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBHLW2004355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0218eb2eac746ead2b2f5145bd3bf26f61fad5c6a1c6a6e836de7e0a2ca251d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBHLW2301837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a25f64e3a6c5b6f467c449d58b768afb248daf2361686fb327594ffd19b2d61. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:45:20Z), 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/USA2Z2301301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b0e7ccabb79f331aababe18587c3aff34a96c4f137c39dd205c5434e5c05ad. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USA2Z2301303.