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 0x8be5e4f9c8ba68dba714ddfd4c7934224e2f8130ac374ce194902ff2ef2240c8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67dc4c77-dca3-4904-ac50-4c8d560e8b5e.json and https://artists.proofprofile.net/proofs/artist/67dc4c77-dca3-4904-ac50-4c8d560e8b5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Music for Ballet Class Vol.1 Graceful by Rebecca Y. Yoo
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 0xc4c3075cc771228ad02d353216140dcc141b05df377e9d1e00b65dc83b6b5f84. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/KRRAR2021194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9f186bc33c60ccd7889a3e4a60de57d6a0e9c071fe3fa62d344e6b4da73046. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KRRAR2021195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abda4100634fd6a5162211ae219542d255e89a4094280f1a715b1f9ed4912b0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/KRRAR2021196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b5fabd941d06c8df777d3895a04a468e5773153dce5c73972ce3fb9a859f1a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:45Z), 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/KRRAR2021199.
Battements Frappes (Piano Sonata No.11, K331, Alla Turca by W. A. Mozart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3391f402bf4903c8a3f207ead9c67f950f9385570844fa88c8ebc56f87753d84. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:45:18Z), 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/KRRAR2021201.
Warming-up (Por Una Cabeza by C. Gardel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca38b6767439c54137dd2a0f035e5b2f61bc55f45af2dacc5b24c829419869be. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KRRAR2021193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c3075cc771228ad02d353216140dcc141b05df377e9d1e00b65dc83b6b5f84. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRRAR2021194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9f186bc33c60ccd7889a3e4a60de57d6a0e9c071fe3fa62d344e6b4da73046. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRRAR2021195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abda4100634fd6a5162211ae219542d255e89a4094280f1a715b1f9ed4912b0. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/KRRAR2021196.
Battements Tendus Jetes 1 (Count Your Blessings by E. O. Excell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90623448cfb914336f5c917435db8548ac0055646bc1aeae703c3d1dc1146658. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/KRRAR2021197.
Battements Tendus Jetes 2 (Tarantella Op.100,No.20 by F. Burgmuller)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6551fb19e63dbddc30f9b38d64f38223ffc0ba2afc37679ddeca6b398091789f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/KRRAR2021198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b5fabd941d06c8df777d3895a04a468e5773153dce5c73972ce3fb9a859f1a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/KRRAR2021199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeead7d20518a6f7bcf062abdfbf3533eaed554652eff341dc3dd90b09f710b92. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/KRRAR2021200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3391f402bf4903c8a3f207ead9c67f950f9385570844fa88c8ebc56f87753d84. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/KRRAR2021201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc1fcca6b042077048f1d586a093c2b3a5c3e3da7ab269c0ae8dbb139581aae. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRRAR2021204.
Adagio 2 (Nocturne KkⅣa No.16 by F. Chopin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd869ea1fd7ddfc0ea7d239409caeed08eb7f8b952e179321f0f718688ba10b4b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRRAR2021207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfb4859d051514c059c759421114eda1c51b36296b9c396fec2a7259f03f382. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/KRRAR2021212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe14e4d0dc7ed9baa01c188b7ea1b32d36bf1a51b32ec8bc245ecab742ff688. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/KRRAR2117170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa0d6d643f0801ed34158c05f91f0a05062ba842c981423cc0e728f023323b9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/KRRAR2117171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52562aefed8a41457c7750199f7e6fced45a7650faaad39596703ab80ba354d4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRRAR2117173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc259a9ca36f5e326e25dfdd927a973236835674cd98ccbad4e65c6b4346e9150. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRRAR2117174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf9513dd1c6b0cb5d4c4871bc04bba954d3e66154c02fe65ac45a03010c357f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/KRRAR2117175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893bcb6b3b5df79333b54a5d685a67d0f5c7af7f84a82b23d2156eada77f5d24. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/KRRAR2117176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55eec5cdc5a7d0aff696e68ae63b92fc71c72585ec764448b834783dc3fb79a8. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/KRRAR2117179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2561553369f0d53f66e18e744c0e6ec52882f5975ed08a05fe23dc0137ce4879. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/KRRAR2117180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a11a0508a4c8873613d399b89d6a7f7699a3b9f5fdec168190205a6dd84a46. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:05:59Z), 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/KRRAR2117181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376e33f868bf3247330176b48c9188f88158dc11903e478c6e67e1f9a434d868. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/KRRAR2117185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa689d256967aeace830bc6c854a027e968c53836009220cc2dc9ae4386e9ca6a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:18:40Z), 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/KRRAR2117187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e8de1b9f7db286ad990b4d8e9ac72c871a6c49d6cab80f2ca861fff1d60f84. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/KRRAR2117189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240c6fb952b1c8d5775f0f202ccea6e33f6c713c4309c752a3ed69878a748eb7. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/KRRAR2117193.
Christmas Meditation Music for Ballet Class Part 2. Center Works