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 0xef816f1f2182bca3c05801c1394f20582bc54c48aa09ec59b720d0f50153bb8b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e63eac39-beae-455a-9a3b-5cd7b7fb5933.json and https://artists.proofprofile.net/proofs/artist/e63eac39-beae-455a-9a3b-5cd7b7fb5933.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 0x9d3704137aebe12f47109c1a4ca352f4e54910546ecd5a1be67ee5e461d5d0f8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLWD2103001.
To the Most Holy Sovereign Lady, Op. 43: IV. O Theotokos, We Shall Never Cease Proclaiming
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5d1a2db2e4fc4c055017b77b09b01ce1f364bffee8c7d57d4a23581469ff24. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLWD2103002.
Liturgy of St. John Chrysostom No. 2, Op. 29: Let us Hasten with Fervour (Arr. For Tenor and Bass Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8e1d5800b6103e9256bbbf7d84afd1bdb16b681adf5dfb2f5b678d4dc57ee5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBLWD2103003.
O Thou Joy of All the Sorrowful (Arr. For Tenor and Bass Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50866b040b0ae21f821bbba8aa0706c201c02b98be05555f851b04a6b86ac8b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLWD2103004.
To the Most Holy Sovereign Lady, Op. 43: I. Let Us Pray to the Most Holy Theotokos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1760c306a368b0e1cc422df93c525faa02c2b3716437b27a1304776dd9eb875. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLWD2103005.
To the Most Holy Sovereign Lady, Op. 43: VI. O Fervent Intercessor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa923e46fab8635516f9fde03439bc7742cd444cc489f25570741fb07246335dc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLWD2103006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e26f34764d690660f2f0d8f166f7e57a44af39613dcc333ded50dae368251b7. 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/GBLWD2103010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a5ed86c19d6be5e1ca5b26da8ef0bd373dd9312fde73130ca80056af415887. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBLWD2103011.
It Is Truly Meet (Arr. For Tenor and Bass Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8958a0b22ec8572001094f50dead6c90f871d52548d4bb5c4338017cb54d968. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLWD2103013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd72c4e97068338f6540d22ac878ff4cb572579fc197081a6ba82656b3c7bc1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLWD2103015.
To the Most Holy Sovereign Lady, Op. 43: V. Beneath Thy Compassion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf19e59f8315cd0ff9976e25c80a97b6411ea226738360db45a496dcfcc4786b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLWD2103016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b5bf959d508e466f71b9cf977ee85b746331b726b9b375b93bf8c63ee00328. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBLWD2103007.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Troparion to the 'Donskoy' Icon of the Theotokos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2ee25b90965a1c678e1f7734f2afc3d923e9a1d4b87f0b0df1b7546ab409e3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBLWD2103008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc2e0811d696338b95016ca413603abba2b71bfa56c7f39f9587104aaf035f2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBLWD2103009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3720854d732691822901c55b63d5367d146234db8c05773ac4047956f46c64dd. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GBLWD2103012.
Exaposteilarion for the 'Kursk Root' Icon of the Theotokos (Arr. For Tenor and Bass Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebec01dd3c8b33cc98f6a39a16c77817c3710c9d667cc1b90a0cc4366e3d089a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBLWD2103014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dce4fea0e7df16e68c8c1881363d3b824c5e3b90275cbbc6a2976886e893657. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBLWD2103017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9335ecd1b430ff137192dc4279cb8193ec60d389aff8014fe126ed922a30b2fb. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBLWD2103018.