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 0xc14e559b7d3f9257e675f5bdbc26662624ad40800de99bd2a354ed8045272eca. 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/a7769cb3-3606-4e3a-b274-be7ad166d39a.json and https://artists.proofprofile.net/proofs/artist/a7769cb3-3606-4e3a-b274-be7ad166d39a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6818d575c11396bc09e0cbdea7985271ced8984ea8868ab48db08db21e5dcc. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:24:33Z), 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/NLGM11700579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67b75148dcb0e08d30dbfe2f4ec12063b5f36310548d43946a1e095083f9947. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NLGM11700578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edd891559ec1d892c7e8828cfe825d5dcbb9f2f9dc2d48d37519ed8ac9c697f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLGM11700573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db3c8d68712c90e80025ffb483b4482c3f6ad3ed67ea6affc74f16f6272d5a2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:05:45Z), 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/NLGM11700566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41644ef6ac0bbe3dc7549eddfe60ea0990ed672f5500103c8df73ad9200f6e6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/NLGM11700556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b20c1335bc62217f51ea4b1de966ec66a5caa92d7848553b7111c9ca364cf6d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NLGM11700550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8092ee458807e04a2bbea85722957e4c4095fa2a01df69feb6ac05ce0050515d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLGM11700569.
Jazz Cat Louis Kids Music (Piano Jazz Version)
God Bless The Child - Piano Jazz Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74e11d625c6a1b37aa616fdacf9136d71bd68015222db1315af07f4c78af78c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLGM11933988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb57d487f2ee51d4ab1e5325f919ca3a458b8c5fec98f4356dd2302613174cd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLGM11933995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef649eb26189887604699b4d5889cbac7f85e03dd08dad907d5eb09cfb6c30f1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLGM11933996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d62b93792fe0f62d36bf95fc67d5099a18f42c7089c011a2ba5bd29f61eec00. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLGM11941914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400f0af1eec52c659f4ab8e1e4390ee5d50a0d2150fe9f7aae3859f47e9ffee9. 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/NLGM11941917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c3deffd62a6ad6d30d5b8df34b3341cfb6d2409c8f8863d7bbfd93d2497be8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:52:56Z), 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/NLGM12016060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffa0c565e2ade95fee2989ab8c9f36ae9a9db75427fd30241c8730634bad710. 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/NLGM12016061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7c61fecc3399a9ce196f30b3ad31625e4c80369f1da48ef0b9e25e144d8fd9. 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/NLGM12016062.
Five Pieces For Two Violins And Piano - Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b78ea8ba17b42e1362823e928fd17c451a68b8b4ca267f1ca861497c0f02243. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLGM12016063.
Five Pieces For Two Violins And Piano - Pt 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6211e22c6864cb413601d1858fe71a32a12c90159254a5d65ae87f29b65e17. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLGM12016064.
Five Pieces For Two Violins And Piano - Pt 2 - Alternate Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb32dadabc33d27174da1dc162ae1506560220a99a5469684f0ce5cb10fa12d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/NLGM12016066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6fcd90b0dfe392a81a2032de25c63025ef2faa2217147a85d0b8b13b6f09f9. 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/NLGM12016069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8c9d2f570a6755178684b529b31e5a15908ea3d86a265843c1fe82ca07fb50. 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/NLGM12016070.
Smooth Jazz for Kids (Piano Jazz Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9af2829587143bc54c82d3ac98b5c65ba067cc394fbc93b691b4486da94b760. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLGM12018542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aefb35a1f135dceef376203ad62d7b3ac7e82708caed9297b64969dbea09d1f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLGM12018543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6adb0941e5ac3023fb179329468ee6a16062902a8d1bf35224677165c8e4fc0. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:52:58Z), 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/NLGM12018544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70936325c6bc0be04b4a2e779eb47444691a5e3fd3ac7f6e251903d5076d814a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLGM12018545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3773147158639b75b4a9b5c7044da4c97bc44ce8893a9d9352ca0102bb78ddc. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NLGM12018549.
Piano Music for Children (Klavierstücke für die Jugend) - R. Schumann
Notebook for Anna Magdalena Bach (Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae394509fd268181c3b14503f87f37adb4987b003d8cdb1e9035ee6704f7a74a. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/NLGM12051063.
Album For The Young (After Schumann) [Piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63f679d13e39d4336b413f2009a207313f53ddf9b4c0174aa48756e76e79751. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLGM12126503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4981151f3fc5f1e0523063c16fba3aa096da2117bed6352b7ab8aff8cec260ae. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:06:06Z), 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/NLGM12126504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8649be620d1af5d3ee95780f72a9f27e2ac3161de9061db236d2bb1a85b5bf5d. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:54:39Z), 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/NLGM12126505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bc7b70728418b0fcad84f4c25a90c6dea105a770ab9ad774842c66152f5a30. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NLGM12126506.
Ma Mère L'Oye - 1. Pavane de la Belle au bois dormant
Liebestraum (Love's Dream), Nr. 3, Thema (8va)
Forellenquintett (Quintet of The Trout), Theme from the 4th Movement
On a Journey with the Orchestra - The Flute
On a Journey with the Orchestra - The Mandolin