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 0xc18963ac72629aed91602bbc6a7fa54b811211997f8232755ed94abe2f5a9917. 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/7989d476-815e-4670-b4dd-8737bdba8a9f.json and https://artists.proofprofile.net/proofs/artist/7989d476-815e-4670-b4dd-8737bdba8a9f.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 0x66d3b06735fb857e1661d3eba29a46c2c971f15e316594251f5f3d07606cc9a5. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:46Z), 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/USCGJ0566453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1896b8d3ca750ddf224aaee71ce144b28f692cef935223d764ce892946c860. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:48:31Z), 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/USCGJ0566656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc5464e860ea599dddd6e2eb8051aa9db33da1803ccead3fcc52dd6d395b8dd. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USCGJ0566657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2959bd121b1308d98021fbbaf366e470824f6089add4380f8246f0e49bc6a7ad. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USCGJ0566661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b34ef984b448f439486558cc7f8067fcbf81c53aaab2c37754bb6db8a833b9. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:43:13Z), 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/USCGJ0559462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bc8be9e973e06b5d2f0d9f37faf1bd8cd103a8cb2d65983e661e10caac5c8f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGJ0559470.
Homespun Songs of the Union Army, Volume 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa757df3b4430cdda03c76af9289b0f5d8b1fcb072f960c429986c477e463eec5. 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/USL4R0773902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadeedd5b9f033f963ce0ea55f1664c05f14cdc527d3c0f10707881a48b5b083. 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/USL4R0773904.
Homespun Songs of the C. S. A., Volume 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fc61fc6297cfc778ae2e476cef75476621270675ae79b68966ea3c34c018b9. 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/USL4R0771230.
Homespun Songs of the C. S. A., Volume 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad4011b735d954fc67ef7d9a6523b5aaac996e783d85b0a22788029a8b87f73. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USL4R0771261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6a18e0af004367b4b0010a475804b14c708ef2fd3b92cc0b4a6cfb4127a5d6. 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/USL4R0771267.
Homespun Songs of the Union Army, Volume 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db1af0f954d4bd5b54e3bc321df9c3cbf54fef3d1b990033026db462b4a1781. 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/USY280711616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4811b4db67c96269cbcc1ba0a7f8ec0bc85b79f5cd651ac5fab3dd4fd6b1c621. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USY280711627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e409d656d4e31865f0a20941ac93f3a970c2bb479cac1ad3380bf3178e3dc0. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:02:00Z), 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/USY280711630.
Homespun Songs of Faith: 1861-1865, Volume 1
Homespun Songs of the Union Army, Volume 3
Homespun Songs of the C. S. A., Volume 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f7f4f18da190a339bb7ac4246a6809c4ea2000c95fc22d3db5c1c986b7a74e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:35Z), 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/USL4R0771403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987a7600c0d999454a98764b8c631c4d760e2b79bb1d9d5fa1b5c3ba86296fb4. 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/USL4R0771410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa887b95f86928a44e93b59b7ed93a3453fffc6b426858d84a7a9714ccc50cade. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:57:17Z), 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/USL4R0771411.
Homespun Songs of the Union Army, Volume 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c14bc265a2652a8ebe775cc30dc6cb1f52e07e76f7514a66c15076ecc11aeda. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:12Z), 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/USY280711753.
Homespun Songs of the C. S. A., Volume 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59c81a5c88b346f39055e37e33ee8acf6445e5adb5389e58f26b27f2a252b5d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USL4R0771589.
Homespun Songs of the Great Smoky Mountains
Homespun Songs of Faith: 1861-1865, Volume 2
Homespun Songs of the Patriots in the American Revolution
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019b781d672303e8ff3aa8b9f1b7e332786a782b2b9a29204951042faa6967dd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:05:08Z), 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/USHM90966203.
Homespun Songs of the Christmas Season, Vol. 2
The Civil War (Original Soundtrack Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a316f72e10c519d49e298ca8cebc0cc173ea6868d1732a73f42ff94fc17af60. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USNO19025613.