thumb|Don Solón Tello singing an icaro to a child in a traditional medicine ritual in the northern Amazon of Peru Icaro () is a South American indigenous and mestizo colloquialism for magic song. Toda
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 0x9bdb3fd6d1887960ab01b53254d7da55b6e7c72521806e1418a265c23afc34ca. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5afb9dd-3e2c-41aa-9596-da857fe8903b.json and https://artists.proofprofile.net/proofs/artist/e5afb9dd-3e2c-41aa-9596-da857fe8903b.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 0xd11bdb479f0e7dbb22fe70eaac853e53e1ae5c3baa512c41ffd0145c40973747. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/PT2X42500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab6cdf0b519d7930c1702d441246dcbb36d675684a04dc0f66279b286609df6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:41:55Z), 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/PT2X42500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11bdb479f0e7dbb22fe70eaac853e53e1ae5c3baa512c41ffd0145c40973747. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PT2X42500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ab159b6e231923e474aa8c6faccb75fb692d4843173dc45a3264301256455b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PT2X42500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab6cdf0b519d7930c1702d441246dcbb36d675684a04dc0f66279b286609df6. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/PT2X42500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0fb95b5a9e3107437c5a990512a094a85de2b7bfbaafb39bc724f5bd182eb7. 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/PT2X42400009.