thumb|right|250px|Hilding Rosenberg Hilding Constantin Rosenberg (June 21, 1892 – May 18, 1985)Lyne Peter H. Rosenberg, Hilding (Constantin). In: The New Grove Dictionary of Opera. Macmillan, London &
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 0x20a22cfba736e944ddc95eb95e45b6159ac5bf23b9875287eeb65118a5b74789. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a56ec18b-deac-405a-968d-893152686276.json and https://artists.proofprofile.net/proofs/artist/a56ec18b-deac-405a-968d-893152686276.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Swedish Tongues: An Anthology of Choirs (1900-1950)
Jul, jul stralande jul (Christmas, radiant Christmas)
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 0xd17fa071d0e20c3028be2d9920b57830493f403f8d894226469107d409aec351. 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/SEAGA0022260.
Larsson: Forkladd Gud / Rosenberg: Den Heliga Natten
Forkladd gud (The Disguised God), Op. 24: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b578789b143fa0e5ec545785a5d5ec3bb53f95b37d75938aa35bde2e3cc53df. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HKI199850401.
Forkladd gud (The Disguised God), Op. 24: III. Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116c8696fa51c414b890aea757f598f6e5fa0745069646b8903942287506b828. 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/HKI199850403.
Forkladd gud (The Disguised God), Op. 24: V. Baritone and Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cc46349cd0de38f28f17172c7332e23cbfda78289a4901e976d6522fdd639c. 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/HKI199850405.
Forkladd gud (The Disguised God), Op. 24: VI. Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c591ed94736d17eb92f5d2f0103e06ee181fc24ec91308570a21aa2ad4559a. 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/HKI199850406.
Railroad Rhythms: Classical Music About Trains
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fa9bb52a2cd55aa0635a1564bfba3c645ae67d28faf4320f30e4538e9ac7df. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA550612210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827a00eee89664fdedfd40c062e97cd4e58ec17e33b9c7dd86f975137ac3d292. 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/DEA550512215.
Serenade for Strings, Op. 11: I. Preludium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e51a5e48759efa9c202050dbcc5479504be52917b909281c81b5ef951fd7c38. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USX760630260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e288bbdb9f5c2c300ec647374e18481206469edfa396466c3e187ba4ad9f0f7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USZGD1500138.
Föreningen Svenska Tonsättare (Recorded 1918-1993)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bc826053bd2c70b6340f12df64fe1ddc2b6c7d711dabbaf59f739b82f99189. 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/SEPXS9304030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3227bad50135c7f64fcdbbcbe6fdc0ace7dbf70dd320556261777a6125d7bd80. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HKI199337001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8e66a74b34c219405087e3c73a4e4bc17efdc9256d1a15df1162383b568d07. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAGA7806090.
Pastoralsvit, Op. 19: II. Romance. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb78abecdf0ce4ea18958d9e21a22e82469ae65b8866249c47bf139b800d9623. 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/SEAEB8865020.
Suite No. 3, Op. 19 No. 1: I. Prelude. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879e23e8f6c097b1be6a7142b19faf58c19c4826a7a4eecc78fbe2f282bb9bb8. 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/SEAEB8865070.
Hilding Rosenberg: String Quartets Nos. 5 & 6
Rosenberg: Symphony No. 6 "Sinfonia semplice" & Symphony No. 3
Rosenberg Plays Rosenberg (The Musician)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4ec3b0b66960d065ea6517f4437edc245cfd22ef2059c65f5fa770adfe603f. 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/QM6P41466354.
Rosenberg: Concertos for Strings Nos. 1 and 4 & Svit over svenska låtar
Rosenberg : Orpheus In Town, Symphony No.3 & Louisville Concerto
Rosenberg: Symphony No. 4, "The Revelation of St. John"
Rosenberg: String Quartets Nos. 10 and 11
Rosenberg: String Quartets Nos. 2, 5 and 8
Rosenberg: String Quartets Nos. 1, 6 and 12
Rosenberg: String Quartet Nos. 4 and 7 / 6 Moments Musicaux
Rosenberg: Louisville Concerto & Symphony No. 2
Concerto No. 3 "Louisville Concerto": I. Andante quieto - Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0499e43e39de5da1f3e084cd61d91c4fe27575bfd1a10680fbc623a79badcec5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2116652.
Concerto No. 3 "Louisville Concerto": II. Poco adagio - Presto - Poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96a2096f91aac6f70d281f073b1f93d944f88c76a960c9a3edea95e1a805229. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2116653.
Concerto No. 3 "Louisville Concerto": III. Allegro energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c0d0c589d722a0248d45ba8bc3b8dfd5973d6075f5ed73b102c86b0bb27c95. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2116654.
Symphony No. 2 "Sinfonia grave": I. Allegro energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fba640034746f2edb25c2e021213bb1a55245f1087147eee385f80f9635e3e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2116655.
Symphony No. 2 "Sinfonia Grave": II. Poco adagio - Allegro assai - Poco allegro - Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fedb46bafe9b2a18da3a4c2a3ebfeed036c4dd41270390ed259dab0e4409dca. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2116656.
Symphony No. 2 "Sinfonia Grave": III. Allegro risoluto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91c1efa73704fc8796b1dc69783ed9068acf7c003968a38a985bb39e7a0016c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2116657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d777a5a228ca2bc4570438670eda5de18bbeb308ae53c70f26eecdd12a18f8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVOZ1206801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e1fd0ef054f528d31ae2f8ebfed81a304bf88d230cf8eec4fcbe23bc01129e. 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/SEVOZ1206805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2490743fb0a03bbf41de9f5807e5841e44007be06960ae13c255ee701f1851. 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/SEVOZ1206808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2bc9cf2f362b161180e0e466d2b1e2d2bc886a56e817b1b6f6b59a60adf82e. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/SEVOZ1206809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e626399a49df703dad9a08108d09e45b2ec22ccefc8ee10d79f2bea8d8a64d. 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/SEVOZ1206812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6480f63ed382677954b3795fc9cdf42040efe3d91cf9df34f17160bfd0cb6088. 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/SEVOZ1206816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24676aaa6343602f3459660c44041c832dc3989a2345d61b33d0727ce495e56. 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/SEAEF9270160.
Larsson: Forkladd Gud (God in Disguise) / Rosenberg: Den Heliga Natten (The Holy Night)
Den heliga natten (The Holy Night): March: De vise mannens marsch (March of the Wise Men)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4544f6f63a6a64d156511c133447b2afd15a96cc1c69e9591a76952afe6d2ad. 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/HKI199262920.