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 0x1ea1956ffe2bb146465706396f3257f720302f81ed79530a22f34823a3d7e74e. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b5b121d-43a6-4ba7-8c88-de2c4cd86566.json and https://artists.proofprofile.net/proofs/artist/7b5b121d-43a6-4ba7-8c88-de2c4cd86566.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 0xd43ec2d3961d1b89c4b1863b9611cb63accd096cddebacec8afe060fb72503db. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/PLA190205501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dc7ac0e18702f2fa6de77760321059da5f519bf3ecbb225a58efa18f887653. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/PLA190205502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef48cb39635dbf3134841515a31bc371b57e3ecb70df77687f0e85418a6682b2. 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/PLA190205505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ac36ac65b533f69706bb308baacc158226f2af8241e91e4078dca343bf57a8. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/PLA190205512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0bbc66cb5843af22a1f9703c445a28b108122ff2589788747ff12855049561. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLA550500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90f7e3878c9ea11b6d8d5341c72936a8918b1c347f860a8a13203ab62c6362f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLA550500012.
"Il canto sospeso" for Soprano, Contralto and Tenor Solo, Mixed Chorus and Orchestra: I. Orchestra
Nono: Il canto sospeso - Mahler: Kindertotenlieder & Ich bin der Welt abhanden gekommen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd59fbbeac498ba1b6aa29ec0a0e5bed5c55596ff71ad6798c310be583e91e25. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSM10312154.