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 0x71dc840d90c785866c2a28f8161ec83b114a4a1b6384fa22400a5f62af106774. 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/06bba065-b8fc-442b-bae2-22469d4db40b.json and https://artists.proofprofile.net/proofs/artist/06bba065-b8fc-442b-bae2-22469d4db40b.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 0xf1abc2c94029f29ff544b0cb711324b02163d065b5207987060a475e85201548. 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/GBRKQ2455855.
Nighttime Piano: Gentle Keys for Restful Sleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd32b0badf49de50a0c60be192ab7675e8c08dff3a78c1536d515a7578e52e5. 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/GBRKQ2424545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6f7e93ead813b255a38c6546f8830b4d429feaab1a4bd376ad1f4f69120ee9. 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/GBRKQ2424561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189eb31c122386a6fe7722ee923dc64391826cc11e97ece1c625fe3b102ac4e6. 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/GBRKQ2424569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006a23bde860b645e6829a37dc61d5efe999e562fb4a298dfb8f7a28f2f626b3. 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/GBRKQ2424577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa31d502d3a71f30b8ae9a2c8add256e422ee4e94a5b05dbd622290df47ea16. 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/GBRKQ2424585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96217c0eb3a9650163c9eb15f307bf91cee1baff93365b87ba5812af333a1af1. 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/GBRKQ2424593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd699399dfebb2149e40019067c29f73f86b543d2a7b32e630aad7bfea01bbccd. 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/GBRKQ2424601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f971e7829ed357084f97c241b76a77f702573a8b4c313ccb4e03c199e0b9a95. 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/GBRKQ2424609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b411efe3a1fd28b50fe50ee27a9a9e57f30311f20e31bc262cd0843fdee1a45. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBRKQ2441784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3b6a5cf383fc5b00b759ed4b1f69d702f94cbee08fac1539f0896c0592d385. 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/GBRKQ2441808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4385e195976ce716aa6c463b41befc37187704b231e3da5e53e5e77c301271. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/GBRKQ2441837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4b85ac3ea6c0a6bb23ac4bfafef893efa726c1146cf650988b2475aafcd454. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBRKQ2402143.
Twilight Reflections: Piano Music Harmonies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38d3d3f7d5c108c05e187f3e450107b7a1f0a6ae15edb2149d8964fc23866ff. 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/QZK6G2121032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44810a1566390aaf82fe46cf3c7f9da2a2d024ada23175788c1bf68b85cb398. 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/QZK6G2121033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047e748cd59faffe1a3c9c493292fe66f25c40f9b921990cb56c6daac657b6a8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6G2121034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6e21a132931221954fc767a9dd0e22c80b7c21c7994f4339b68e63cf464e3b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6G2121035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596638adb1e98db6fec40614a1917e58ed37ac5a3c7a85abc0b5ff9a658f05d6. 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/QZK6G2121036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd691080dbded11517b565c591d715a846bb095ce430bffdb2486a27bdb4b391. 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/QZK6G2121037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824b38337e4e7a3a225c659a543ed47549151bddcfb2db86b05828cdb16e9f54. 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/QZK6G2121038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c94f35e293e037c4b12964c6813927010b14d70323513af9ad7bd66e5c34491. 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/QZK6G2121039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916a4e934f579b7b4a9e360ef517822aa0ea92044967c8136da699d597bc1791. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6G2121040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb640456eb7d9a64fcf870a64cd0d8b667a5813d7f6b27e12fe11cef04d55f35. 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/QZK6G2121041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211905c12df9bfad40c36f16cf6df72e58f4031e59d42ccf31ae0e4b3a020f30. 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/QZK6G2121042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9d6f52cf554bf90b5a0b62a100d98cb0bb67533b132c4478c43cc6ed1cdbef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6G2121043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f97dce633036fc733bfbf6e0f47d85530160fdcb174ca582302362916fb8554. 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/QZK6G2121044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0348b08b67b246f0d1c2f9e2924dc56f87a7a728e3aa17ab6b990a97777abe. 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/QZK6G2121045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a68d30f0d2505c8698c6ea834e4890d1b7854a3be1e821d4b498735f044c8f3. 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/QZK6G2121046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c2cbe3a5698bdca572a8e5b3507a766bd05a3c33af8a16dfc95a876b08ea7f. 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/QZK6G2121047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bb3f517b9f522f84af54d5136f76870d932241502f6775bb4b909485d0c708. 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/QZK6G2121048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f284e4df1dc32d48ee8e12f65bda9b901e56efda0ce75610c601763ebcd8c6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6G2121049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35c8be6b2443a8421bfd361d7202352c777288946c66a57947d9cf482a7920d. 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/QZK6G2121050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9223ff8d3d2202b9998b73de83a8a914377f3c76dd7a05d5605b83a335f5fe28. 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/QZK6G2121051.