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 0x533fa1bf7cbba0e351b3ed9a1605ef8c0526d6708fbcefc24fc5d5457341764c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cd9e2c8-1a48-4e20-aa8f-f566e29a9ae5.json and https://artists.proofprofile.net/proofs/artist/7cd9e2c8-1a48-4e20-aa8f-f566e29a9ae5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kazda & Indigo Strings Play the Music of Led Zeppelin (Arr. for Bass Guitar and String Quartet)
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 0x4536103f1342947b3a47aacf5be5b7928ff1b0aa23e0a0b7c7ebd9abaf64c190. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR59R1855148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144817da8eeef4c201596808eb8419435c54823cd0b2fcbffe8dc6512ee59b9d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR59R1855150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1457b208591aeae9869ddfcc6254d1fcfd0d9f41f8027c7b931910737a87727a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR59R1855151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fe918e03b171a15dc2045a19af942e858bcf6f53fb8e3dac51726ee43aac63. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR59R1855153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475656b756ce3f296eb5eeeb7277909fa5eeedae3e704775d1fd69ddaac32e3c. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/FR59R1855158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c22fae046434fa8d3cff589799fcc7053d0ea6d429995c8d8231ad77daf877. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USB8U1015331.
Babe I'm Gonna Leave You (Arr. J. Kazda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd91c6feaadba76dd2cdb375410f7245a25391cb24310552e4d383b82115f7f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USB8U1015333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ef5163b2963260d0f9319d54b963772ff6614cc4a4eb8df44dc609b928e59d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USB8U1053552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1289793f5dde9492cf5c3663ad746d1064d4eb11855bd2aa0cc1d08b660c8d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USB8U1053553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eccb57b29cf747345770b0be0d04a4e131cca9fd93474ee076609a8433beaf1. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USB8U1053554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0c1c2ce272cb17857920bf8cc0a60417d483e4896c8d39b3f88a3139dd5dd4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USB8U1053555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062a1b30758cab714b070b638f56d70e154c8b8692bbb3533b32474d0be11fb3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USB8U1053556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867950b4e290d76a18c3594d7d393ff7b37adb2e8f01388ec86c34a5720dc044. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USB8U1053557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e8075c28a6d0c6bc3f92b5a7121ff88b6859cc59ee9d4acf0dd0c95499f042. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USB8U1053558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b72af81221a518aa141a5d0115ccce8e9c75755ef454f15fa6784499d2b9bb8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USB8U1053559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4890c42cde55d2c4bf9b71307fdc4bb009187ec4c1d0e496d0f92585f3f3db9c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USB8U1053560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd35516d7d15381c02a60c8df9c3d16d73227e16bcce93c5d2251448ba30859f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USB8U1053561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e113df6fe236aaa1bc2b5afc70db3b75084a6a8e269221324b0a36ccf8b996. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USB8U1053562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc779f8436e358c2a6fdd82f5ad9948c52c27ca72d0cbfb281e9246c1a07862b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USB8U1053563.
Shostakovich, D.: Igroki (The Gamblers) [Opera]