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 0xd975e7d6c13261774b5a6e29839ffdcdc12a55fb36baff3652f50ee783cce4e1. 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/f5a8c537-f027-4fb5-9b72-98e298e9acf7.json and https://artists.proofprofile.net/proofs/artist/f5a8c537-f027-4fb5-9b72-98e298e9acf7.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 0xa57817dec69d0cee9ef03a3bcb7ce0a0078c95c54a0f0f28d77a81a665441d54. 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/NLGM11944570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa377c72abe9893d3f799888193bb6bff908d08e01e5a53807a59c6f6768e37a. 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/NLGM11944574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1d76f2368bbf909ec2b74a6b54f16a0acf816fb578101694f1ca49dcc33cee. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLGM11948470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962a0b76728f21cb0f753e9c0801c9a72a57b4d37c9bf776c58776fd65b736e0. 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/NLGM11948471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc28c35d76d2dba8df69a24b2a6da7c795b563cfea07e8adb0c310e585342c7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLGM11948472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8f54ba76994c3969f00fd3fdd4c05dbc607f433a6a54245e269e85f6bf76d7. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/NLGM11948473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b595f4376a44ab4abb777a3007adfbe2ef5e35265b41bfaa03aa2db5572dcd4. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/NLGM11948474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca10a1bd5dcb69d1501bb0ad228fa920329925c76a059a3c21ef1eccf183529. 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/NLGM11948475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d54821efdedb4daf4e066444c7a6ab607043e8597337566ed2d09daf9702bb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/NLGM11948476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32431f8620db0397e60e328eccf5202a24e04f458720bdf0255059bdaa7157b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NLGM11948477.
Prelude and Fugue In E Flat - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354164069fe528418042fb89e32e453294e684a938cd237f655c3b854691b849. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLGM11948479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87244aa56a5485b08ff8fabda338375345e82338ddb4afd5f5c9769a9648a7da. 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/NLGM12015840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b3beecbb92eeca92b86a74297b3f893805a26ad365568d419a28d4b519462a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/NLGM12017524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967fdf1d4be958dfd5993775dc2a0a404f45936c891d20f61efcfc6fc945bef7. 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/NLGM12017532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ef81c2f63639c29cb33cf3569f95c9a699a59cdc9d1838855a6e90d8a68143. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/NLGM12018323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0314974bbe94dee364faf421ed1cd483aabc5ef4a6c3b8aecf13c7d6b684c4bb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/NLGM12018324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63faadd939b8e783c718d57dce217ff3e97a5e9fb15efbe28327ffa1050ef314. 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/NLGM12018325.
Twinkle Twinkle Little Star - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeabaafec5ff45283a99628ca1dd12d5e1cc3cb0c2a04b3ee989072b4641ed32. 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/NLGM12030498.
Piano Music for Children (Klavierstücke für die Jugend) - R. Schumann
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4851b22980617b36f038636554a3a68f58ef8aaddc34c2aa95c3d53d3470336. 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/NLGM12031493.
The Carnival of the Animals, The Swan - Saxophone Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c8dbefba18d8ae7fceb8a569176be8d7b0f17a6661ccacca22e336ee852204. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/NLGM12050842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913285a73fc3d6fbdc24577edbe730ae7ff87918f957968dfe44ea72bd485b7d. 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/NLGM12050843.
Symphony No. 9 – Ode to Joy - Saxophone Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b5b77773c1d5f74f65e3d5ce98b96ddddb23df4511ff9cdc45d225eab6a7e6. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/NLGM12050844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebf10540f512f6e582048e63fb7f3d1a7e326a12fcc225184b7cc5bfadf31f2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/NLGM12050850.
P. Tchaikovsky - Album For The Young (After Schumann)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a37439c0e9a2374dac9a4a9feb1a681fd74f961ea4fc7c716b8d9153e0608bf. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/NLGM12135500.
The Swan for cello and piano (from Carnival of the Animals)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57aa04426da6f0f32f09198d8d38be57bb028d2326d3a2e4363d10ef6795102f. 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/NL6VJ2200270.
Mozy and the Flute - Children's Songs Part 1
On a Journey with the Orchestra - The Flute
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0114a4f7ab199541116d6207f15ba36fb44aa506858c9ad25d4fb4b1eae6c046. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/NL6VJ2454280.
On a Journey with the Orchestra - The Mandolin
Mozy and the Flute - Children's Songs Part 2
If You're Happy and You Know It - Flute version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2bfaa995e7b4e6c14daefb784c1cfa8cfdae8b3a095d7880111907342718d5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NL6VJ2424627.
Mozy and the Clarinet - Children's Songs Part 1
Mozy and the Clarinet - Children's Songs Part 2
Traveling With The Orchestra - The String Quartet
On a Trip with the Orchestra - The Clarinet