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 0xf2664bc6283ca158b35f8613d607c82aa1741d9837ffe8e74a01bb518dbf53af. 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/ae0d10b9-a365-4be5-b1d0-0038d5f78971.json and https://artists.proofprofile.net/proofs/artist/ae0d10b9-a365-4be5-b1d0-0038d5f78971.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 0x6250de46a5b00a3046ba0e8dbc6bfff2e2a0915fd7ab40502b01a2b688dd0946. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:57:23Z), 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/TCADF1714904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aa76effdd02668af0cfe9db2f9977d669034f859498424bec65a5e67cbca05. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCADF1714908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1af73017a1a169380be13254910017d7bb201dad87b59b06839d2a1a2a97792. 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/TCADF1714907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7eadb8eda94ab3a1d6aa10fb2cd2c463fa1fc7de0ab0a861d3b402f2961eef. 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/TCADF1714909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b88c3d2b052f75baaac08ce11605ac48b1d24fe626f6a5b28a995516039bda. 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/TCADF1714911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e01e632bec38293f6e8862c5f1edb80d0fde7b7c2a8323919665897ff4d2266. 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/TCADF1714914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c13ce86c0998fa51351f67099851b7d9323750fb294b555ce9513e95b7bc8b. 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/TCADF1714916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6231c1d6308881281e249f1feb3d9add1df3305741ea3d368062eff4ad84d4e4. 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/TCACP1676836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c0a11aadfbed379f9dac430aaf70242c687c3051f9b289f7809a61acbc003c. 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/TCACP1676839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7e77d78269edbf1866e5cda98930a9b5f8a5f30159915aa507438b239fcbf1. 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/TCACP1676840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a10797bde2bfe196bd2170ac8452d9014cd619c34b0e89642718e4daaa7370. 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/TCACP1676851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320787e09ffd748bd9e3d3f2a682685ae8b638ad171ff81474bb1858324d6a48. 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/TCACP1676854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed4c023959f147145cfaac5c856e383f22664e6a52158d688e7b668b29ab1a1. 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/TCACG1554580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8746505277e9dd2e5d0a5e08df613a91c1879c061b2dc40ac9dde260f71aff59. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACG1554583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813dc6bb9f42b44aa5415512289183ac3e1fc5d9f1a0bb8bd9d8368f8376f629. 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/TCACG1554585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6c25b8c830d07e83f628f40c2e37a2486c1dd0a7460de55a7e4a91166b0d41. 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/TCACG1554591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5277dbe2a652e4ce078d3f55f39b37f960aa12203c414a7a756ec8d86120cc42. 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/TCACG1554592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432ed488eead5db63c88c4668dfab2f4af0b9cde29bf5524a0f013a6c2025404. 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/TCABU1479226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54241c880130a644185f159457ca167e9979c41d27e8fac7b2b9b1ba43192d62. 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/TCABU1479261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc810ac33ebbe514d5674b839983c2f72500954dbcbb56e9390ad201ace4dfc37. 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/TCAAS1098826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b907f3099ab3aaef667518e3320d40fe2ca4a563b2c4c63a326f3c1a57f910. 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/TCAAS1098840.
Best Kept Secret Three- Patiently Waiting
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70d4682f7bcf40df87e1992f9c3cb1ee2e17fcf099e085679181c444cb6684a. 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/USTC50804430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ea26a429c430340d5deb8bd8dfbda95c9b2308cdaf50928416b35636f385a4. 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/USTC50804433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332b237bcf2cb7aaf7d7d24398c51b03d903c0d03a9df03803748b8153f09a48. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USTC50804435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19df050c504fbf2293ec5ac8d6063da00e1b98b9428d47ab40f19edae9d92ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USTC50804437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea4249bb2517743b399e2333d314792e35ed83af2ca75ed2e0e43962e7c0f43. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/USTC50804440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ef3910bef93e2ae4fc30384ffa144580df95d518ce8c379d9c8aebe0b9afa3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:06:18Z), 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/USTC50804443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a50a556f24581d20f4f82684797e835e888da473bc950e358b3357639f966f1. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:09Z), 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/USTC50804446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c938d392a1d0488344a150e26fb4088182d95bdab8185fc1c2d009f4203a1d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USTCC1065694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4889a0939aba795d3cdc38a77f5a876a538c77f207ce228df3dc010f71a656dd. 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/USTCC1065695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb6bbe556aa073165dddcc2ec1081f6fb8202c8e58398cf6ad1bb2d7f5a8e37. 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/USTCC1065697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da736481a58936c2c8db3243d55ab50b781ecc9538dd98b3665c4f908912a14. 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/USTCC1065701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8b8d1c1defbf5c1939e61058f518e9d6c2a90873d2ddd7165c480ea38daf26. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USTCC1065704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56c1204bad7ab89db9c46730302a73907a7e31379695a58bc95c8a5d8ec7f80. 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/TCABT1476885.