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 0x67215dfadb1042db17f6a24366a3b13fef0f4d5e721351a12e0f3c021a0e1d11. 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/ce690732-f746-42eb-8507-61335f211336.json and https://artists.proofprofile.net/proofs/artist/ce690732-f746-42eb-8507-61335f211336.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 0x80bf893825ed86744a5e475422e33a9bcbca1dd0424b2325bbc3a2d9c59fb8a1. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPJ901808260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336f938580d4f78ead4dd0386f4c6105c11cc13a22652152249e19fef677cac1. 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/TCJPI1839153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306e78d81b83adfaef8a0dd9bdb8c9660e43d19076d10bc0855ec3cba136c2c8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCJPM2040828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c82cfc2b4698d378c51078972635c54396604f0fdb8c6d6590fedb54c903b16. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCJPO2136550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4b298b78fe694c13062f64d3be04e9669bfceb215e2b32ee55688be11330e3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPS2249897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49c8f13442621bbaadd70405f40fcaba738151e0a316352a13e1290464e1b56. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:53Z), 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/TCJPT2229778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae91b674e007f47e3c12f0826dbd25c11dd3d1da70aec5be74c66c9eb3b9b7d. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JP92L2303290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a245bf69bc8f157776da9f8ba15fa134f4f1b886b2caeda07e6ad0396ebf944. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JP92L2303300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cd736e5ff6f77558d9d1a7f2d7c1762d2bc5410cd1c781f1e7515e94a7035a. 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/JP92L2303310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89997237d9027908df9a46ae6e91fc5b4d0a9a9c939f28785e4114df56497206. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JP92L2303320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e3180244f2760a37ece044eabfc2534dc0c87a9b436a2b7a0e41ba86c68b3d. 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/JP92L2303330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75005563a09d9e98433118b41d768f776fbab4ff5caadad4a35bf57803ac8b9. 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/JP92L2303340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8818cc7a3b3c21c08f34a55b2f748f58a4112e281cb20b79fc0329794ca99b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/JP92L2303350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0db0ed0c87e8dc369732894861aae2968860f35720609a34a29928e4e204683. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:11:40Z), 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/TCJPE2501479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf24a7ea44f803d543ddeb9f6ebc7df6a8e00d26f2efc88a30c14431d1ac485. 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/TCJPR2263495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc284a922310f8d9294f89fd08bef0b1b07a392f0afb9290c87f6074262e2ceb0. 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/TCJPQ2290442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6476af83054a9c6fc703481bb39a9fa46dcf4130668dc5e8a825c286cf54f3. 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/TCJPX2395345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc87b25f369a06e692b61e369f41c1e55b7dcc1c6de8626836417a65e6bbaea. 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/TCJPI1968183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa60003e0210ae8d044143d4c6eb59e08fd6e87f735e03f24f783a849d2c42f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPU902001433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa956c9711b877c81f4fd5df1f88cb3283406dcfbcd1f2f4ee303658fba4e9c50. 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/TCJPQ2139343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc906b603d56b233b1066d75977d8f72567fe6e9d2015764442cc9eccf0270e3. 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/TCJPQ2107700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6476af83054a9c6fc703481bb39a9fa46dcf4130668dc5e8a825c286cf54f3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCJPX2395345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75baec1ce55fb90ff359e907d554ff9a0ceab4a0084e160e5afeeaed66c1bb6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCJPQ2290294.
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 0x04e5dc8d8acacf0be24cdf8ff667cc7ec4482559175dc76d92e00d0cde7fab9d. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/TCJPQ2290418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdd0b61d55979e31659e456919d87ab65326ab9dad274160a3d444e62de4df8. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/TCJPP2158648.