thumb|upright|Elizabeth Futral performing at the 2010 Phoenicia International Festival of the Voice Susan Elizabeth Futral (born September 27, 1963 in Johnston County, North Carolina)North Carolina Bi
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 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 0x143e7a6178cd13157b935c922d09f23f043636cc64d2f17e3e5a04989ee41452. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e09021c-2354-4f18-a378-8bfc0457018e.json and https://artists.proofprofile.net/proofs/artist/4e09021c-2354-4f18-a378-8bfc0457018e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Paulus, S.: To Be Certain of the Dawn [Oratorio]
To Be Certain of the Dawn: Pt. II: Remembrance: This We Ask of You (chorus)
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 0xffc0d95454770b75dea2602743e083f323860eaade6dcdfde8fb8d977109edea. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAER0826110 — a six-check JSON result.
L'Enfant et les sortilèges, M.71: Introduction. "J'ai pas envie de faire ma page"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87153410de89b6c1580eab92722ef1cb599b81735efed63ddc83185dd8b7908d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059731901 — a six-check JSON result.
L'Enfant et les sortilèges, M.71 / Première partie: Arrière! Je réchauffe les bons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a008a8e857752aacf9f23251443280c625768c0742f3f444dd7032a1339e340. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059731909 — a six-check JSON result.
L'Enfant et les sortilèges, M.71 / Première partie: Adieu, pastourelles!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb664ddf5cb55963b63509c0d342d1832fb0906eb6d089b553417e7baf124592. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059731910 — a six-check JSON result.
L'Enfant et les sortilèges, M.71: Danse des rainettes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6660afcb7d6df46bde2b21b31680d7735829f0974a5b523bac90e796052762a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059731920 — a six-check JSON result.
L'Enfant et les sortilèges, M.71 / Deuxième partie: Il est bon, l'Enfant, il est sage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b09bd11e7384067e09720a08efe284a9a9fbd0567be7ef907532f90ac389102. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059731925 — a six-check JSON result.
Ma mère l'oye, ballet, M. 62: 2.Pavane de la Belle au bois dormant.Lent - Allegro - Mouvement de Valse modéré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a05ed59b97953f8782c85f48d2bf06a1d402f8c670ab96c7a12eb980c1c1d0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059704703 — a six-check JSON result.
Ma mère l'oye, M. 62: 7. Apothéose. Le Jardin féerique. Lent et grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf130ba55d1899912a46f4cfc441a4dae0a5ed7e4b8d9a7a3ce780446378b672c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059704707 — a six-check JSON result.
Lucia of Lammermoor, Part II. Act I Scene 2: Come here to me, Lucia (Enrico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157ce91c8ea9d739c107464046854d24456ead64d8eb629357656b1ec523ad20. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0208616 — a six-check JSON result.
Requiem in D Minor, K. 626: Requiem KV 626: Introitus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d61c8bf2be9d1bc54609f00563e5bbae06426ec87a483bb9fa036289820300. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19100366 — a six-check JSON result.
Vesperae solennes de confessore, K. 339: Laudate Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd590ee3ef01ac2f79a260eab8919df2172159025503accf0577147f851dd4033. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE478700017 — a six-check JSON result.
Ein deutsches Requiem, Op. 45: Ihr habt nun Traurigkeit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d09fd587e3434f553e3fa17331739e41cd752ce1f0c24d1d013e265976d0349. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC18300199 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab17d1735f12f999df60b3783226172a413321b0737608feb2e29447ff57a26. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC767900003 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bf6dd3a0153c97802e24b71c5b4f42eaaa21f8b0b22f85307c739f54536329. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE479000040 — a six-check JSON result.
Stabat Mater, P. 77: I. Stabat mater dolorosa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41467c89c55f546c06b9c7ef2f096c4268650aafbd72c72e62b66f2ef3d55167. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19300449 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936861877afdcc6d09fbf9686bc4bf787266570c6bcaccb36cc3582f3d6900d2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBARU9300004 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8e1b9f25d2560d46263cf772844dc4b0025fc49925005b551128a0715e1b7e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBARU9800799 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc3bbfb43646ea32f6140c7203d73c94313861dc0152f00c6c4886e5124aa98. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19200242 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86208239289cab2dcb7a570c662b4b12f5b29658fd7925d82f15b1bb76b0884e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10403078 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c38141348495478c2728fe171df44da892cb978fe918b4b118932bb76a9341d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC17700130 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d64867049318ed0f8f9fce1f7da6490bb3dc2c0cc7dd7c28bc8b5a89c0068f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC767900011 — a six-check JSON result.
Mass in C Major, K. 317 "Coronation Mass": Agnus Dei, Dona Nobis Pacem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08857c70d48710c66daee36d206de734a4db7165cb467782a0c148fca608dfb2. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19000444 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72606930054fba0468182d23315fd3fd89c28dd47b8c38b2120a3f38ce78943. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE478900111 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfba4b15e32149c8f5a6429d799f94a5d8f8101596ed4a07ff331d7e2eff786. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE478700020 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24909ea2ef9a209c34d42e0de4613d46c7da773af7d23b6466d056e9eab44c2f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19000383 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fae7dc9990d8e30cd0b5f5961a937ee0df1eb3858cc813c6ea9c3c0e5d6749. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19100721 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e751dc609519b35caa9dd70a40944a16da89e939195a51aa16f7bf714db70d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19100725 — a six-check JSON result.
The Essential RTÉ National Symphony Orchestra
A Streetcar named desire / Act 3: Real! Who wants real? (Blanche, Mitch)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e12b7e65625a07e23cb1fa22c345c83975e3bb60a8181597f8889c2a6e4564a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059830337 — a six-check JSON result.
A Streetcar named desire / Act 3: I can smell the sea air (Blanche)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60aa3953eb733120c1071b6021fb273860de00535deef796bccef2ec2689919d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059830345 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25d55ed7ec20a1118373c4b8fca4b1469cf0b43c8053dfffd08042a121ccaf4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199639532 — a six-check JSON result.
Hugo Weisgall: Six Characters in Search of an Author