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 0xcda0326fead944d2f702ca7eefca2dc136ded761fd043facb38de9138d225825. 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/6e824574-aa54-4ec3-8866-59f9fd4b28ff.json and https://artists.proofprofile.net/proofs/artist/6e824574-aa54-4ec3-8866-59f9fd4b28ff.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 0x4b45d0780a79f93a41eedb17284e9ccc635b106b217422fd3fd816b1022fe7ca. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGH2061573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9895a2b39dabb25fa4e417707d883640c6192a126a992a48e1bd13867b277fe. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USCGH2061571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b45d0780a79f93a41eedb17284e9ccc635b106b217422fd3fd816b1022fe7ca. 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/USCGH2061573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db3f6844d13fb421c91c79cf522942f2058170b24d108a485d11a4ca8e6d0f3. 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/USCGH2061574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a886fe279e47ead0c8951943645df3ffc7dada4eb1531efc655f129eeaf8001. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGJ2137471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56000005aeb8a72001b1a7d2515f42586e75efeee2c230fe8a6d2e9d95255153. 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/QZMEV2326910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc428c733c30645fa0818caba224c954e436ae7830671306b59c963089459217c. 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/QZMEV2326914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed1eade5002e7872888c02de7de591407311548cc6f86f055d6513543a93ef4. 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/QZMEV2326917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82eeadcfe603a87db0f550fae9fc0f820b49f42bc49c82be962480f2ca7380a0. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNMT2302067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53a03230fe05d53de540f0f1ed5c928de3c7f02dc686d871aed44546c071c53. 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/ES64E2461474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05d019033bf2a58be3ca0360c99bafb8da1cd493092add8bf4c98d714a3d01a. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QM6P42403164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8bf97b771a729ce26d52634c628e65f61b27e4a302780d5b564f6fb89de504. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QM7282413720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e05c5717d87b35a0e831741103c06eaaea91928313142bc5acc835b71e92777. 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/QMDA62497534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5450d6b5b0c2105fe694c87fa4043aca77bdc4f4de047890d9cb58ae954c89ff. 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/QMDA62497533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e05c5717d87b35a0e831741103c06eaaea91928313142bc5acc835b71e92777. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMDA62497534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cff44f9886cd52225f21b49edab9be2204dead5fb92b3c79512bedc22a85e6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QMFME2501963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb799801221bbb4f675f1fadecdb486e36ac825d88f62987d8a2aaee834e3399. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMFME2502071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa482a116ff2e8ce8be85ebc06e2c36ba501a021880873b43d6299cc54b01026. 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/ES71G1947571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a87bbb824c5204cec48db198539d8e67b58df910e97e07aed02d84428fe7cf. 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/ES71G1843373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdd89c224c8932b44c20a08ce7b463e93e1796bf1b96f454fd77af9f5a7ec20. 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/SE6SA2309958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33305ac3022f8916c883b67c445816df6445c3904497d314d7c2c5769c6afed. 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/SE6TI2366630.