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 0x3a5251fe9338d279ff7a5b9dc117a8377d6fe8722eb9068042d3f59e77a67f82. 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/713bcca0-353e-42db-9a68-fb47e999082a.json and https://artists.proofprofile.net/proofs/artist/713bcca0-353e-42db-9a68-fb47e999082a.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 0xc8eac27d7f870ca24101902ab9853830df0b4e56279caf106822f45baa3e85d6. 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/QZHN31987673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6020a38ca0f9a9f3eb238d3061a0b1cdfb3e51888bbfc9a011a9e5ef5d93568b. 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/QZHN31987675.
I Can't Stand the Rain: Jazz & Soul Sessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb982034a10f0c9e354675478b17adb2a005d634083fce203db4eebe0c4338c72. 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/QZHN81959961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eb96b3c754139f44f9c32b77c6a07b52eeecef15ced5694462b7307b8a05e6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZHNB1929969.
Over the Rainbow (String Quartet) [From the Wizard of Oz]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05c09b3a0f834fa0a1af183135be83b0b8933348c5bf2f0bd0f2d18b45f3ee3. 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/QZHNB1929978.
Some Day My Prince Will Come (From "Snow White and the Seven Dwarfs") [Violin & Guitar]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4de8a39a5debc1cb1932671f0baf4567b895b4dee13021f07a0bccc1b3e0e82. 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/QZHNB1929980.
In Dreams (String Quartet) [From the Lord of the Rings: The Fellowship of the Ring]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aec272053c5a2f9ad353e1743bea5c1b7681fb4ef95ccb04de7039607c64a9e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZHNB1929983.
Can You Feel the Love Tonight (String Quartet) [From the Lion King]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a0d0d63c2e53141b5a1526116cd0aefef58b47834a0f27c3d05b847a85d19e. 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/QZHNB1929986.
Can't Help Falling In Love: Strings for Lovers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202bde7cebfdbf55d20e272e1379119e21630231f647b251ec8c136d3dd1d544. 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/QZFZ42041731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4315bbef64aaf92e3799aaef9eff18c6149f54df08f92d783ddf62f4507be1e9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFZ42041732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409d3674d89c072d5f32cdd188854300b6fe8784f231eb1b876f577ffe19a8ae. 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/QZFZ42041733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b881d2eea873fe46b56cfee000a615d07c929f59de230cfd14280b489b33b05. 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/QZFZ42041735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e521d80818882b829d890d837d627ceb2fc83e39c9ff538d4bc3dc5fb2f5a9. 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/QZFZ42041736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168ac3663fc8c0656eb3e65ae6bb61926cb5b65b42a1c7d7b145ffd3970025b1. 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/QZFZ42041744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2651bc71a50d639a6607eadca1ee8b67e7fdbe04a0b3e0f9b4dc400111fa17. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFZ42041749.
Can't Help Falling in Love (String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49e548aa05322a5d0a69aef63e1ee7340d21cf87a6302e5e6ba3aaba63918a0. 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/QZFZ42041750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec866cac7da73abab7e8abc96968a3ad4361be7bc312fb0a16585ef2eb7d78b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZK6F2070362.
The Way You Look Tonight (Violin & Guitar Duo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e2c26964f891efd68d6cf10bd030d881a33699f226ad94e3ce28a3c5271502. 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/QZK6F2070363.
What a Wonderful World (Violin & Guitar Duo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58307796f4cb8652c73829a899b0298be7911bb9ead5e2da74e9a6736e894633. 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/QZK6F2070364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36e0cd38dab291e5e0ea48a93955e3ca257ac8866641e1597aa1f1759157c5f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6F2070366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5b8d56e861afd22cbc521e8a0ca1bec6c9f33a74cdd5b60fbbc329de9c2874. 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/QZK6F2070376.
Running Up That Hill: The 80s String Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6c73a96b7e66c66c9c38df953c0dc995db0e4b8762e56837e5e5a609e7b1a6. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZPLS2241527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b7562b7bf67127fb616d83714c5f16269a40baf26f92163944792819126224. 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/QZRP42225787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ef9fc9b67ef1823c23288b297ba155f53db133ccbdbec9a973538d4a819435. 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/QZNWU2066931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6deb9a42e5ccb834ac7a169d92534e503fb91448a39f166639ff72cf61f9c6. 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/QZNWU2066941.
Wildest Dreams: The 2010s String Collection
Flame Trees: The Australia & NZ String Collection
Harvest Moon: The Folk String Collection