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 0xe6fce7f5148fda3ebf94d3b9f69dccd49d2f3d51cd39f1086b3a70d82bfcd8e6. 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/156013e7-0401-47c2-b51e-30608b5e92c0.json and https://artists.proofprofile.net/proofs/artist/156013e7-0401-47c2-b51e-30608b5e92c0.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 0x8612394038f04aef9df64d610c7d68237d04a7a524b04cb1406de1e021514185. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ITHC22100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0ab7a8876653ed0bfd016277ed2aecac507894cfc171312a62e925476a8973. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/IT3SJ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2170d6d3d238ce791171fbe2305baff5fd97929cefd9a707a1e10832784b3ce0. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:35:00Z), 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/IT3SJ2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0ab7a8876653ed0bfd016277ed2aecac507894cfc171312a62e925476a8973. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IT3SJ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644fd6ad8e9d1eaa5e92f7f1bda7e77c7de8e1c1bdb28df40e055c1c5649bf15. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IT3SJ2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2170d6d3d238ce791171fbe2305baff5fd97929cefd9a707a1e10832784b3ce0. 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/IT3SJ2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374cf32c95abbb7b6fc271d9f38946aaf2285bb8ba06b85106502c5d69543aaf. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:34:34Z), 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/IT3SJ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654cbe612879bae8950c6e831b6c12972c15c8a787ca623781573a0962740755. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IT3SJ2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cff2e5bb2a9ce214c25b69c664d3abbb172f36e5f37d0deaa16c1bc6b11e3e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/IT3SJ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f8dd6999b7e39a0ea64ff93432084f592fc11a49d76f43ed3cf4e7c0daa516. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IT3SJ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644fd6ad8e9d1eaa5e92f7f1bda7e77c7de8e1c1bdb28df40e055c1c5649bf15. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/IT3SJ2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2df0ab4e61f56181373e48c95f55db64d806c450f72f54d5f236553f76bb87b. 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/ITHDG2400003.