Karkoff: 7 Pieces - 6 Chinese Impressions - Vision - Excerpts from 6 Serious Songs - Symphony No. 4
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 0xc6989e9951d762cf88aabf19dd33fb39d1356d87156ca5cdf1f22db8717bef92. 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/SEBAA1302301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b98b433e447ae862ab0cdca15cbabe96c28a911555b1a231fa7014d564b9f53. 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/SEBAA1302302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4f93d2685daca4b58d07b4110da8a35c723225cda4e2b003dfb1bbe02ce710. 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/SEBAA1302303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429882fdeb09ce89723e36335d6535b122d9b10ea988e2058af35f8e884a4cf3. 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/SEBAA1302304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a940b8224401f7b5156de113f98bec83f43dc3629bcc5c9b0ce1458092e8015. 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/SEBAA1302305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc60cab8144fcd2a66d5db6e0c59ab4c348591a0d2900d6bdf764f71d2b40f. 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/SEBAA1302306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6c1469648cf9f88eb943fc57c4da192b181c7c05b884c399c54699dcd3a554. 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/SEBAA1302307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7001662f252b8ab1937b59163387ce0c1cf8969ca5c38f9214d58e3ef01bacca. 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/SEBAA1302314.
6 Serious Songs Op. 14: Den langa vagen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c4ed1484695d58ad5808952690bb2b708183e98143e25fe9324b06c3e566c0. 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/SEBAA1302315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbaae3ff291c341db68b2c3dce74ee3387ef6d085af23cd9624de0f37f5ab2c. 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/SEBAA1302316.
6 Serious Songs Op. 14: Skmning Twilight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495000d74b74dedd3a4bb718811475e88eae0651812586b0a73fb759c17e3a1c. 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/SEBAA1302317.
Symphony No. 4 Op. 69: I. Introduzione. Largo - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b915d7eef611d4b6fea5714ea74d88cdf3ba172804c1ece63746ee6ce52a0a. 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/SEBAA1302318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e3c29757c99a8c05bacc23de80ed96de2aaa76b5a944b9071f4ee1bdb97125. 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/SEBAA1302319.
Symphony No. 4 Op. 69: III. Finale. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ad422d196917f2f0ac4b5ba2311991aeecd11c0e3d0957e1f7725d436877e3. 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/SEBAA1302320.
6 Serious Songs, Op. 14: Den langa vagen (The long road)
6 Serious Songs, Op. 14: Resa i lijusar (Journey in light-year)
6 Serious Songs, Op. 14: Skmning Twilight
Symphony No. 4, Op. 69: I. Introduzione: Largo - Allegro
Symphony No. 4, Op. 69: III. Finale: Allegro vivace
Stockholms studentsångare sjunger under Einar Ralf
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bbab47228ca79c877ed2755abf377c0661528f915de197792538205b41bd76. 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/SEBAA1202815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28da2d9ea239f4dcb94f9cb472c92395e7f43774a03f49139bffc1221892c0bc. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/SEBAA1202816.
Symphony No. 4, Op. 69: I. Introduzione. Largo - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437a2375dc1b5fd2d2fcdcee134afd62446fe9f38462215b81b4564bda6514a2. 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/SEBAA1203602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b764a718a1fd4fd2ecb95b7f434daea2727c75284a1ececda6f1d3ef15b8635. 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/SEBAA1203603.
Symphony No. 4, Op. 69: III. Finale. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87586b7a0f4eb995445e66cb83284236b412c6e346e16534a62ace7e325f8970. 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/SEBAA1203604.