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 0xd81e0795b7d209c82c57547f12b1b61b4ab1114ac95fd73b5a390480e5a32478. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f94e4222-7106-4551-a223-3358d0dde3a6.json and https://artists.proofprofile.net/proofs/artist/f94e4222-7106-4551-a223-3358d0dde3a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x69f4dbcb7598800ab0fe67058184dfaf06409f9156d050b8cac56c25cbf33ff9. 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/SEBAA1400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8748d96b89835419f2de2bef2c539e486886d83c0cc2a028743044935e932ca4. 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/SEBAA1400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77836a0f8539e551951aca74cd05f5853e90bdb323be90c56dc64fe3db8331b4. 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/SEBAA1400903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac94795998e609602320e5ea48fd96fd9611a52969d707a3b294afdaa03e659c. 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/SEBAA1400904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89f73941b8baa6ff00e96db9c10b23f19724cad5cb698e84130a126cf544809. 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/SEBAA1400905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd6742d427950cefc1cd33a29fbb3bae0efd6b38af9a6cdad204b58b15ee9b5. 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/SEBAA1400906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bc2c387570e55b0c6113e1e3e26e64a1c1b6ce5493e881b3c9dabec637a4b7. 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/SEBAA1400907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1179d66386f3f8e13f2714bf4aa3312b0737f70164981c1cef3627d4d24f4d. 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/SEBAA1400908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db37d87e9a3ba39e8d754e0158f772ba973c734780dd0ac367d4308853caad2. 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/SEBAA1400909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44654c407849a2dde2551f10c350c92878d0eaadf02349948136715d1f84b5ef. 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/SEBAA1400910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bccf18bb9e1f36e0142fc4354565b218565c4aa539c57099fb2a3dd8514b572. 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/SEBAA1400911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063964e3a45a01d7b32fecc1929bc4539cef8116200356034a5fab505b1ef3f2. 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/SEBAA1400912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d398a8803288da3a69db357ff31e3a5aafe306fcf2c2c60e4e2f98998acf061. 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/SEBAA1400913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc17b6218c69c8e5284cb34c5c4888b43ec77d869534c32dd97c24dfa6b8bd2b. 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/SEBAA1400914.
Andrea Tarrodi: Highlands - Cello Concerto
Brahms, Maier & Röntgen: Violin Concertos
Skog & Nilsson: Contemporary Violin Concertos
Sibelius - Stenhammar - Nielsen - Svendsen - Nelson
Molly Kien: Pyramid, Song of Britomartis & Smarginatura
Mats Larsson Gothe: Symphony No. 2, The Apotheosis of the Dance & The Autumn Diary
Johannes Gustavsson conducts Future Classics II
Mendelssohn: Piano Concerto No. 1 - Variations serieuses - Concerto for Violin and Piano in D minor
Tobias Broström: Samsara - Double Concerto, Dreamscape & Cello Concerto