thumb|Rudolf Friml, 1905 center|220px|Friml's signature Charles Rudolf Friml"Mrs. Rudolf Friml to Receive Divorce". The New York Times, July 25, 1915, p. 15 (December 7, 1879 – November 12, 1972) was
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 0xb7d036f499539726adf1fb89738d0a7aa8f14d9bc1cf2eead89621466b0e151a. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/956b7678-5638-4a26-9c8a-7acbbbbc1790.json and https://artists.proofprofile.net/proofs/artist/956b7678-5638-4a26-9c8a-7acbbbbc1790.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Printemps. Piano Evocations from the Golden Age
Lieder Ohne Worte. Op. 62: No. 1 in G Major - Welte-Mignon 1209
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 0xeff3fbef481ca2ec377cf4f7bbbfa07743e765c56ef65acff77b8b4a176a92cb. 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/DEPI82322149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b6448d3dd11ede1b89b9c5576f44e1d4e9291a4e0ef41fba2cc3e6fbf11591. 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/DEPI82322143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ebe48aaf037f9bd22b5d86a66bf7120f449bdf494fa5ae24fe29c4700bae0a. 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/DEPI82322142.
Paganini Etudes, S. 161: No. 3, "La Campanella"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d36b74ade77358449d21f9a0d3f57dccd7c72903ef32f9fcaaa464fbe96c7e5. 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/DEPI82322150.
Sure on This Shining Night: The Romantic Song in America
The Firefly: Act One - Opening "Eyes Front"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad84cdbb3ba7655eb4a26927dd9ae32ca4b92cbc229ade65c4e27646c0dadee. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USAB10620975.
Friml, Rudolf: Bygone Days - The Music Of Rudolf Friml
Lynn, Vera: The Early Years, Vol. 1 (1936-1939)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0093a2635ed933f60284814bc7682f1d949ee48b78f0bb12a1a38cbcb2d25b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190055402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01eb2189d6aaecd43465da2b0ab2a6cfa0a30a41d60cef63d4fad729f4f76a06. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKI190055405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffef44ec0fb22be57318ab5391767bf05ed5b5d22445bc10483f3eb854c4d0d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI190055408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431608ab0bceae2119674a119c700684286d9b036f03955f316be65d9e1c6386. 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/HKI190055416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345991a0b1fd1d26781ccb11b41669583647e6f0b464d3b62d65b0ba1eb3fc14. 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/HKI190055420.
Richard Crooks sings Lebendige Vergangenheit and Other Favourites
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec52a4e931175968dd63fe5ce5d7dccc4c178bd354d53db3880c460efb0aec86. 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/GBAJY9806701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dc324912484a2aa165fa899b0498126ff5f9ea7f435b65ddcce2b089114842. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBAJY9806702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84eec38497e667069f3b025f441c2d7770811c184c9a2da6b3b27a2d8178626. 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/GBAJY9806703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfc33ebe11da723a9df2115039f5a11fa83ea5859ed45d8b92aff39fadf5743. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9806704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16171bf382223e9b7f5ab2cac7dafcf2dd6ff52798d1b6563813e017328696bb. 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/GBAJY9806705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86855ceed75dfe8ab437396e69a021f5963c84833cd86b7533258638e9b05917. 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/GBAJY9806708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a67fbe691658709f8db47174f5fe215dbe5a83d9fa4372357f9f73b65e8d31. 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/GBAJY9806710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacebea9ea7b39d88daabd22a1194e3a46068b8ec5d844e87847c8342b3f1a556. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9806714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a12aabaa4a35c2352c1da269253aebbe1c3840019d47077666cf7a0c4c1baa. 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/GBAJY9806716.
Symphony No. 5½ "A Symphony for Fun": I. Perpetual Emotion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee413b56a07135bf53936b6a49a49fb18aacde24a318e5d6525491dad379b421. 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/GBAJY9806718.
Symphony No. 5½ "A Symphony for Fun": II. Spiritual?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2eff6204155a07d0fc82da117e4b2eedc9d9e82ebe572a72e5877a527628600. 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/GBAJY9806719.
Symphony No. 5½ "A Symphony for Fun": III. Scherzofrenia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf0a048d52d32864bd9ab807f28d01fb1dbba4d728e3251222380b2059a449f. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBAJY9806720.
Symphony No. 5½ "A Symphony for Fun": IV. Conclusion!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba8286466e075d2fbd8467013a8756e6e6fa9380bc66af0ad6e3044182cc5bb. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9806721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e785714cbd63b2510843b91dfd75bc12446e5fba7ce144cd8e298a9b6922df9. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GBAJY9806722.
Indian Love Call (Live On The Ed Sullivan Show, November 26, 1950)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3490f87a6de1ba1e6ec77a7ebeb82db74371ef31a663998fbcec32aad357c5ec. 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/SEVGX8100109.