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 0x5dc61a183624195c4dbdae5d6e52714620fa344c068e0f9c93d780bfe893a609. 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/66cdfcc3-d5e4-4165-a24e-52ff8d75acbc.json and https://artists.proofprofile.net/proofs/artist/66cdfcc3-d5e4-4165-a24e-52ff8d75acbc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le monde merveilleux de la musique de genre
The Golden Age of Light Music: Childhood Memories - Vol. 2
The Golden Age of Light Music: Four Decades of Light Music - Vol. 1, 1920s & 30s
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 0x68489a77722f6e4ef917b6859bd59f4db0f51ee4f1e0bdbb3ea57b89a030854e. 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/CH6630753407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042de7d1c4ef179430ffff1c11318a9b0c095fb0dede6083286889e4eaf51d18. 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/CH6630753411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1353b20185449c9e3d55cb6f7305c328103e8cd5365ee8ae14a54fa78d6af0. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CH6630753414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a3bbb2976141a5bb542ce97468fb3ec78349ddda9efe7ab1d16e4928f8b3e9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CH6630753412.
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
Samuel Coleridge-Taylor: Hiawatha’s Wedding Feast: He was dress’d in shirt of doe-skin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1e163900e1e5deae0aa1359f123cc1ffdd4769d16d19e0f811ca2212aad857. 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/GB75B1300092.
Samuel Coleridge-Taylor: Hiawatha’s Wedding Feast: First he danc’d a solemn measure
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1862d8d8da8a51e06f8db047b0665130eda364ad9da81217519161f04cc24cf6. 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/GB75B1300093.
Samuel Coleridge-Taylor: Hiawatha’s Wedding Feast: Then said they to Chibiabos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6266bf8d23c772679fa822e7c15482e43723af8816dc44e1bc622d0385c9e7c0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB75B1300094.
Samuel Coleridge-Taylor: Hiawatha’s Wedding Feast: Such was Hiawatha’s wedding
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d164c8b0bd67c16be7a5163a3556205b8050273ee50d23eef1db82cd9151167. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB75B1300098.
Vaughan Williams: A London Symphony (1920 version)
Cincinnati Wind Symphony: American Variations
Suite of Old American Dances: I. Cake Walk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4c4f7c4356c4527509cb197bd5a238b82c14ede1f154cfd392eaa621d46267. 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/USNE90806007.
Suite of Old American Dances: II. Schottische
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacac1858a08e54a7e8743f724d4eb8b8900736922014c2d16b913f9fbc51c1bd. 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/USNE90806008.
Suite of Old American Dances: III. Western One-Step
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f6b69054d0476aee8324c9a380e5e43801b2a99771697b64306f76f2e0955f. 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/USNE90806009.
Suite of Old American Dances: IV. Wallflower Waltz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb9feada6db01d8a9e79e0440751cbffa0bd16135e511ceb3706c4b0785ebab. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USNE90806010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be62ed076ba0a5dc79434988f9cfbb24b19173cf2adfe8e1d63cbfac803dd9e. 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/USNE90806011.
Napoli Variations (arr. for wind orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af020eba723f4a05576e870ca9adbf140652aed0c52c5b25f929351a2b3e7b9. 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/USNE90806013.
歌劇「ローエングリン」より「エルザの大聖堂への行列」 (L. カイエ編)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce744234bab28af740189eadce822471c047aeefa3248954d493e688f5dd5a83. 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/JPH291670102.
楽劇「ジークフリート」より「森のささやき」 (大橋晃一 編)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c03ffb5f902b2c8a8c998ead933b1f74c230f45f1bee13719b055dd41c3906e. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/JPH291670105.
楽劇「神々のたそがれ」より「葬送行進曲」 (D. ゴッドフライ編)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a78cfbc657207609f920bd4e03b1e3c52ef8838731682814e150f76a987e0f. 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/JPH291670106.
The American Bandmasters Association Commemorative Recording Series: William F. Santelmann
Godfrey/Schwartz/Frank: Music for Strings and Mallet Percussion