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 0xffc69723819bd161bd32f58670d7c933a72c594b4fd1b41032bf1c63f2aca3ee. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10d1706b-feaf-4cc5-9169-2872653a761d.json and https://artists.proofprofile.net/proofs/artist/10d1706b-feaf-4cc5-9169-2872653a761d.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 0xdba513b782bcd7e3fe18063945650f1af77bf91612f70ec25f52f988d12049bc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG1950524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac8fdb41e2dc03b53a29678728ab06fd7df084b64b074a9fe601700a117456c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1950525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389d32b660ebf1221bb767bc848245f8a6b180110aa54a357d4876d98d26a17b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1950526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75ad1c049708ca91185d80d8122bc2807929ce4d7ced65f8005015b7ddc8c31. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1950527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178e6e9c22a23ae8f6eed9d0f280d19c3d5088b7ed74ea3ad00bd8592013828b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1950530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72be1568b51b8e35391e010a634238ff4371b1435b5c21b8ef715ce7676fd1e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG1950531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d7216f0b25a36c1d5266775772c2fd66795de5b85cec78df87d828259226de. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1950533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662c23e98b7beb44aee16d05dd5209d526f5436d4e98bebec6ef1c3100b7beda. 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/US7VG1950534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf186a23dcdd737be3896c7363e86b10f07d370a2d46acb7ae2f54670794e0f78. 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/US7VG1950535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0afa1cad2d278d414d1cd37fa699c5b860ee7b92ddcf227914e5d75a395646. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG1950536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d3485de1079aa67b833ee2ee08db43dc97deb9d939dd3c6bd7a9dad9715f61. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:43:34Z), 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/US7VG1950529.
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 0x54256c017fbe8355555fe69c0aa8d62296f4d4daaf34710300c88b3a34b0a30e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US7VG1950528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7df11468838106b0946ccfa8220e6f80131379791eaafcf1f43843bc04780a8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US7VG1950532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a24fdcf7bf4f96379a6123e9baa6fce79acd9744b735563e89ec2c5b04b0ed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1950395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0ae285c5774a851bd849dec540455a246fea425fb09d3f01d866acfaa88d19. 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/US7VG1950439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed23beb0d6afd94658074e1258759b61013fc9769075e965ec8872999be9537. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2134252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08762d5e6413a881e4605721aae8db224356e6a1b9715acdcb8ebc0f98a05654. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG1950462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccfca0ef2a66980dc8ac31841fa76e129cfd3bc7d55e0b59c511a8e82362a48. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1950407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c45baa878b006a7aa1d9811b40ef580f33bb5fb7a66c3a0f76d6a952fe76b10. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US7VG1950434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a18c4fc9396cda1f1bb08cddae464cef1a3d43b95c3191e610f316e0c349a6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US7VG1950437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc364cb0f4868a5cd8e55ad802479c87f93f28f0be9d11e4c61fa3ca0df9d9880. 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/US7VG1950393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3dd89c0af57a433a4f2c51935cbf63c673022985881da8b670fe767bf53489. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US7VG1950438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2dd12ff183bf55c91e9ef1689b676807ace8effeedb14db4366f1fa78b9479. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZGLS1951914.