Saint Thomas Choir of Men & Boys, Fifth Avenue, New York
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 0x5f1f8d709c7515567d43544e1292557b759549596768c22909b351140beb4222. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59e8bb1e-2be2-4f54-979b-74b8b0eda05d.json and https://artists.proofprofile.net/proofs/artist/59e8bb1e-2be2-4f54-979b-74b8b0eda05d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O Sing Unto the Lord: Sacred Music by Henry Purcell
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 0x18dfbe0b51749ea0fcd4feaed3587f10b08add25db42d4dd2f97d3922949d173. 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/GBLLH2377601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ef9ebb82cf0bb38811cc6be8dfd993c2c0d1c31a2af42f3fdfbe08c7412e76. 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/GBLLH2377608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9d961527e6ac6adc31b0b33b441619084bcc2a38c0fec13129ee12ace2d29d. 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/GBLLH2377616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540cc080ad0cbd3658183fac6f34a092e696591b345101c6f959f14b1eac12b4. 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/GBLLH2377622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1fe7bcaaea2e7b7d91518a138224ee0742ef74799bebad8687b0458222910d. 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/GBLLH2377623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d4cb9b50029c281715afc6374425eba92a8c5ea17d5f717483bbd6d407c4df. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBLLH2377602.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75582047138089deb9101a36bf1dc2000bd6d82a1151a5d4fb4fae420f86e1a. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBLLH2377603.
Mass for Four Voices: II. Gloria in excelsis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d787fd8e3a4099515d5b9c3fdd23ee16ea4c0c4a1a5663dbf1e79cba06c990b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBLLH2377604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f57b800d92ce219f3a1b3e5697015a27684dfb10595723325edb8e4c3ca3eb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBLLH2377605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71137129cd96f35e36d954a9a934cf99652bbd8c913b3de8c324efb8df912b57. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBLLH2377607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48218f3a6958dfad1514e559a23a259e7bf715e9a34ff1e282b4aa4472b41e57. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBLLH2377609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69571d7af3763b84a2cc358901d2ee3dafdda855ab7e633999dfe0c5519eaaed. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBLLH2377614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ad45b397587426836ff5a53dea56fd5f4e159b6eadaefb58c989c1eefebd1d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBLLH2377618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da3b10700eac21baff95e1102afb222fe70fcd2a5f428243d4548e81417f705. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBLLH2377620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e253a2f69f67398e1c91c67092e020d4f4c22d4de72cbb7365729b747b53841. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBLLH2377628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc81453f826e871a34de043af1bf63011fca55ef50520d1ebddee232956e1f0. 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/GBC3S1617414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93304834cf39df07c0405bdd87e0269de901884098922cb00a6c40d58d7dbfd. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBC3S1617404.
No Small Wonder: Music for the Christmas Season
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d931b2f32111dfa950bec0f5d6ac54546dd6beb6ce54f114db4528e349a203. 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/GBC3S1718707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72804d86734f0bd80e1c9dea4b4070f55cf812f1cbe91512da955dea43a147bd. 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/GBC3S1718709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5e27360c18da8d1a511a96a1d8771918cacf64e1abbde9ffb1d3bca50545b3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBC3S1718706.
Sergei Rachmaninoff: Vespers (All-Night Vigil), Op. 37