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 0xa8d421d1543be6fbe78e19db351806cbbe6c5e12fdffd7a4ee348b379471224e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99f5b261-9013-4d3b-8fea-957d5fd8b24c.json and https://artists.proofprofile.net/proofs/artist/99f5b261-9013-4d3b-8fea-957d5fd8b24c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oscar Aleman 1928-1943 : L'éclectique génie argentin de la guitare, Buenos Aires
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 0x9be1eb41fe6d115f8e9912cae8745ff042e66e560e049026efaebdb1589d52c2. 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/USAD49900774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7500078a501cb81a173cf85993fb7b00b52903f9cfdcf24194a9f0f81adcfc32. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USAD49900778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa939811c2377574ffefc519d517d59c086db630ea3f8940e636e60d8972ce4ab. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USAD49900790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2731e677da9957ec5af82dde8630cefe91cfeed10baefd105f7305f3e8ef578b. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USA560309726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb8237f798f91f9dba75b0b26f3893526ad5267d60d6c662f371a3b5e3f5b26. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:05Z), 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/USA560309727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7eccb190f7f249405ac7ceb531c5230d01bf7cef93165dec1670b6eb84d313. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:34:53Z), 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/USA560309731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770c17c104d547a72b4f7a57c6ba45392372194d92c4c9be3463727f956841d4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USA560309732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7243604e78877eff13443e8a5547362c5f8c273723d6d20a576ca0e24d8d5051. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:45:10Z), 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/ART340902461.
The King of Swing Guitar: Oscar Alemán - Recordings 1938-1939
Ritmo Loco - El Rey de la Guitarra Swing
Saga Jazz: Ritmo Loco - El Rey de la Guitarra Swing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34153cf67ccbf86689bde628dc17fd082c673202a385990b2ad8d4579b7b0832. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:47:32Z), 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/ARA821611195.