The Chamber Choir of St. Peter Cetinje Seminary
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 0xfb686e323983e99693f4d4492fa908edcc3ce419a0e05172f64aaf45926374e1. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af2677be-8423-4760-a72f-ee509ed5846b.json and https://artists.proofprofile.net/proofs/artist/af2677be-8423-4760-a72f-ee509ed5846b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Meddley: Defte Lai (Byzantine Chant XIII C.), Aksion Estin [Byzantine Chant XV C.], Hristos Anesti [Byzantine Traditional Chant]
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 0xb4082c43be5b2b14e63eba4eb825820f3a487e271687abd7f831a47c3922e554. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:42:35Z), 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/QM4TW1666743.
We Praise Thee - Bulgarian Chant XVII C.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c456b78c1d5a805b345221306a639ec379187658c6f618bf3ef628c90ec7b0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM4TW1666746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733a995951ece8d8739b38b70d93bca25b71e772ef6dd9ce66c4cb36f72f2875. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QM4TW1666747.
Troparion of Pentecost - Nikola the Serb, XV C.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47b42da8b00b2fe315028dcb63907a403b355b971551266c08ddc3fc04c9cba. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:28Z), 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/QM4TW1666748.
Praise the Lord - Communion Hymn "Karlovci" Traditional Chant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451fdbc17e318c0c119fe9203732f22ff460cb2553c43b8efd95717990bfe780. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM4TW1666750.
The Great Orthodox Liturgy. The Divine Liturgy of St. John Chrysostom
Great Litany - Traditional Serbian Chant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407addc677753be4e824977e6b3c73771adc7fe8a4266af1b0e78457e9259456. 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/PLA801656701.
Troparion to St Peter of Cetinje - Serbian "Karlovci" Chant, Mode VII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac5f497ca7b1a5b4afe59f619da3dbace3caee7de2fa7171ba392c4331d2f2e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLA801656706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab4a8a71520ca1281dc0d16df906b8a34ca8b7a29a973d80f40fb8a1ba5cc20. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLA801656714.
Litany of Supplication - Traditional Serbian Chant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f08478ba6f749d5b1bb5d0b9bc66a73e24a756c540d4cf328303adcb957c1f5. 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/PLA801656715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdaeff69af614bd039d76a973de63c62c497f23a03ac1e83f9731f4ae238f78. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLA801656719.