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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb142ccc7edd7daeb679738fc01dad2fb323620cc38ad679bae7b0b0a138492e5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4bd054a-abe7-42ef-8f5c-ea982fc75531.json and https://artists.proofprofile.net/proofs/artist/d4bd054a-abe7-42ef-8f5c-ea982fc75531.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Have a Fun Class!: Solo Piano Music for Ballet Class (Special Edition)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d5b8cd2928c7b0913b31dd4a1ae0f8ee1f05847a2240694c2aa7daddb19d72. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:34:14Z), 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/USA2P1916013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad11589458949fd3ca363a81bbd8999a1157807ba6c229cb40651c63348bab18. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USA2P1916014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a092db0abe11a846d7b7f885e0837d51bcd13646d06460aa51d8b96951c8815. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USA2P1916015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39beec49b3d88ec08747fc5eccc45acdc9cd1d2735f4c1a4926d2903499d2695. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:43:08Z), 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/USA2P1916016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97419cfae9e98977289cef1f8c2727e19533597621690f706d15f4eae84c2ab. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USA2P1916017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0870466317ca5bff469ec41c6511959daac13c4de39bf7f29f7096e37745583. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USA2P1916019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70541b98630b80230d8c3b0bb7cf5994545198b5d1d03ea3d126af66dd5dfd9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USA2P1916020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7b78f0bb18122b7d25cce6ae64f65382f6e56da7e3c9d51ad3e4d52636bead. 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/USA2P1915930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b18652eb59aa8c50bd8ea201ebf63d0f5e8dc60dad2bdfc955f37186fe06d9d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:50Z), 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/USA2P1915931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c75604237c2f353c1800c339d8384ba2cdc9db6b30365a57b5b416f4eb7608. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USA2P1915932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f7d06dd923a7a485e99bc5d2d4bf86705cbd7d3ad5ff2b7b27f093ca549d0a. 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/USA2P1915933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b574974abf87ef6dbe0d1af1e8d9f62db40491a3be53621100227f11a46d9b3. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USA2P1915934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff39e21a3445e98c3551d9b80a41ace8584419f3180bf276b2a62bcf65106221. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA2P1915935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3704a06b457b12bcf583fef2f700ef058b4ffdd19943a7614d3d6505fd781f2e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P1915936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7cbee2e75e11b6656e90050d225028b9ee9016595dfbcf87ac0b6976aaac0e. Chain 2 (Bitcoin): anchored in block 959110 (2026-07-22T10:22:05Z), 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/USA2P1915939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab21727cda19f1f3b38d5e1ce7748486aad9a3c9fa5104ed443145db1cde0ee. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USA2P1915940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe201cef40ca4401cf83363e6dbaea81744c4ba938e624d2f5765cbbc6ffaef49. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USA2P1915942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57287518142e41d5f9896861a9f1741e83da1f3a4c3b612c612d30e121bd5bde. 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/USA2P1915956.
Character! Have a Fun Class! (9 Solo Piano Music for Character Class)
Ballet Class with Marina Stolyar. 2021 Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21c40596ccf4947b5740be66675dce33c8c5cff3d11032b1f9060300c4b3a57. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZKWA2028158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b480d7a9f009960493b69e9819177fd6bf13f1c17d9a6c422df1df82837275. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZKWA2028159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66591f026df6f5b3d798ed8b8f7930bfc574e970c16ea68800706c96568d8ed. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZKWA2028160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1894b0dd89c7678a4937e4f1fc10e92fd8aaa0bcb8eba240340c5885c5a395f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:30:44Z), 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/QZKWA2028162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cf2242150d86210373469796b0ed29d0d97a67169de8752a6dee51d41d3c38. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZKWA2028164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c5c21c97207ba5151b33ec84bf2850e08e953911b0e642e26232001994ff67. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZKWA2028165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b3b72410ea965e6727253b3d655e490101a62d3d4f3d583ed0433480f9e4d6. 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/QZKWA2322469.