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 0x283234a23ff293dbd8ffa7b78ec507baba2796de6069f0579e6def3790b1cc70. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d348a5c-3684-4f62-8596-e0740c7b2ab8.json and https://artists.proofprofile.net/proofs/artist/4d348a5c-3684-4f62-8596-e0740c7b2ab8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johann Hieronymus Kapsberger: Música para Tiorba
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 0x11e25b95d35b9fca3c340ed6585693afa8ab61f249f456155a419de92946267b. 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/ES8401600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d91830cacaac7863234d191fe48a063af2b7c6aae0db67fb8144d036e56eca. 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/ES8401600141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2891aa982dc8de097fc3811a41db92c33bd1ce37d00d0a54e44fdd134223de2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES8401600149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3851a4fb70863aa42321eda90ab7e35911339f87df1230ebf5b23322fe599fb. 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/ES8401600150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31a2e87372857e6602119308a80970d2e7dd464240fc98cb1d2288f0c6a5756. 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/ES8401600152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbbf570d41a77b490f8758545d77028c9129392b6796f021c27e94400709715. 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/ES8401600156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaa7cef0e510fffb8a10070f714a05000692856fd04600c1d594d0e9ccea964. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ES8401600143.
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 0x3d78f5233b790eb85bd19f6fb338bda8aaf84806974449c85a9247dd275d461b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ES8401600142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf771d2f14d2db1382f1e9343cc490953742b22dee1fef9187a5c3e796bf1b5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES8401600144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db4dfc8d099c06278cf587ff9115392219589ba5dc31dfa7cf162f14f9ffea9. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES8401600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcbf41779dde6fd13bbdfaea746ca968669be27462275b6fb9a726f84d83d7b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ES8401600146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a8d2f4d897dab34e9ce85c7555c219da55a5ad0e5156c797d989b77572c0eb. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES8401600147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5822986f36383268fce71584e270a4fa174f3154113c3395a543b2cb784d375d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES8401600148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942fa5d8370e195d3fbdbb54bb24a3bce069ad311645eef2dd0c196181b0dc31. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES8401600151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd514dd99a8992a49c2254b9112fdf66a544f68dab67898476e834a4bff596851. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES8401600153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be6c0915029cadc0acb64670884793d14ea21b4881ab064872cde41b2a1d3cb. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES8401600154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9becdf024401e324344b9e728714a05327ea7bf4e1f823ce7d5b08af49916de. 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/ES8401600155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b061953f2243d4800e71905882b2e983e0b170755460ba9ba2c34e0dcafe4f9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES8401600158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bfb9112c860d1c5bce2b84ac07b41ce5253318d127e7f216fe98db83f69d19. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES8401600159.