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 0xd6db683ad3248c8712ec8e130cf5413daded95f610d17adb138ae8b36bce5992. 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/56175f56-f543-43bf-91ae-58044f1f23df.json and https://artists.proofprofile.net/proofs/artist/56175f56-f543-43bf-91ae-58044f1f23df.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 0x92c7be662d33556ecf7737b227706d1360df50c10b5935d6dcb5255890a0ddb3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR2X41610644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1fde4f5a990f888af3c974ae001f9ab1f8007c25d5a8569c4f5aaefe78cbc4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR10S1790368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40537657641fdb28e74e1c398b5b5960c46b2c5189fe8d03c5053c2b164d7be. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR1932580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8840a5e7430b14ea905dea983b0dfcea5275a480e0ef313f1259c68059b9ecf0. 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/CA5KR1846233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd68637e083d9f64cea6724283d2d9ce4f446f494285b749317c970cbd96a07e. 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/FR6V81619239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4098fbf05199c4e0f8abbe5adf6505dda6ddb22205e0b0e1090ce84dd242429c. 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/FR6V81619240.
Fly Sound - Diego Medina & J.Beren Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e80784e50e44e024e20f7a17770f34e5208a6bca0c5ef13731be64cfba2248. 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/FR6V81619241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339c9ab63b83507cac36203d51cb5236a70a9e1f316bd7ee295a492d22525819. 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/FR6V81619242.
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 0x16558ebf74331df751f2ea46f863e50e3ba6319d0bf768841cd90bd893af3796. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR2018567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38f1ecf63e85082dd7fe43384e9a29052d62c5e2db63a5872c588119dab2b6c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR2018570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e705089098d4399b6d5db33ebaf8a45784bdd5d0d9a05043524f3f89e29b01. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CA5KR2016878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf97c9354b27be7236f42acb1c598b58463a4d934d7c82f77ef7f0a6b1b9480. 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/CA5KR2036417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96e7550e3a87ae68ba8824957415c1e9fd667d42bf4496e0c9aa9ff647f3432. 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/CA5KR2036418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4d0418138afb36c0d0ea1d47642a60bde83099e089c3bd8346c443bd496038. 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/CA5KR2068328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dec4491c1dbc4194e4114957c900efe534e518260d301fd7a54f2bb501574ce. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CA5KR2089994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa4bc56aab4f3e245e0495d9763b9c1184d60b2d76803a4d1ef594254463d9c. 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/CA5KR2091183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080d7354cb599fee2e19137784e1ef7b1ac01a338d513885b699ee97aabe10c4. 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/CA5KR2137033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b9e7c1e242d141f4807f9e8df8da62995c9bb9d4d3201268bcef5088fa8f00. 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/CA5KR2137032.
The Place (Agu & Emmanuel Callejas Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9796aa787632c895395db1c9759d38a057d33ef7a77c020e01572b96d162a2. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZG2X2505839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1875cfb9814b9e395a5bc94a4c1805019c9c688d265298358a16eb5fb6f2c980. 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/QZYFZ2315401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341eea6e7b92484defb73db29953b1d6569351c07d56d4a7f8001814d0d72a43. 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/CA5KR2113667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63052f5ad377c16cb97b0d1e7bb898844c577f364c1f3a67b371fb5e39d3b02e. 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/CA5KR2088160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bc8e082819304732f808c9c6f2fb14627071913dca31839d2e4fa57d0e6bb2. 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/CA5KR2396198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c7df5109e16c15593041e45896bbbcce5e9f4016a36f4a6d4b3f4bcbba0539. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CA5KR2137027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5051bad07f2600426e8142eb6e03650487fd6170e554cdde83b080d67125e82c. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/CA5KR2088159.