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 0x7da8802169c96de1f488e3424cb57340420c2e621eaf01e1595628cbd3269237. 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/98bdd559-1d42-428e-b45f-d321f845563d.json and https://artists.proofprofile.net/proofs/artist/98bdd559-1d42-428e-b45f-d321f845563d.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 0x432ce5e721d7ecf55c6592d42a0351cecbfd4bfc83a281bca5e0477e02cc7907. 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/QZGLM2192417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973baf2996004841c73da2897bb1bdcbaf1d2364bbb27a6c8c56f66dd05e2a5d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZEQU2248780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c700444641eff2d222d62e4f8b9ec59d7b3ad492b358cdb6a3259b9016a96f2. 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/QZ5AB2308237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bcc3a2222d60e3435a007a7e3a618d442809970eb454ed30d4f93c0c075643. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZ5AB2308239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9777d5ff37087b808e93795cab1f298101f562b91e7440aa8fc88c1419e73bad. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ES06F2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82653ef7433e600e73830b7bc2872c8f55d7b218fab8b7f78ff881fc4b7edf4. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ES06F2300458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774e43f28b8a9ccd283241bedcb0c118b800ab38479baf761523791600e5641d. 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/ES06F2300461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eb4ec406f4726816ef3f7457139b0c3c6bc2186973d212064ae08193a123a6. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/ES06F2300780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd696e954f3768ec32021fcb06dee1fb3d725fd27b8609910fe31245736c3b10. 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/ES06F2300782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f47bd30409e876f7c8740af570e6220fd34e5b0469a7003bda381a29892e83e. 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/ES06F2401450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395b87314c7546510a86d1cd028ac28a039a060769bedfa815c44a8e9f50e549. 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/ES06F2401451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d3d2943c4eb3aad678750b11de19a7ab070eaff078878c1c2f1aec536e942b. 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/QZ5AB2463715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c9499dc935ea9ec4a4cc34c687bc71588795d2f032b8e780345a755fcab138. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZNJX2497930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e007171749c5f432525d7a9e9cda55f17c0697ad5a1dcf6ffbaa250c5165c4. 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/QZNJX2497931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a58804c871e8ba43aaad32ec193749a29c63c6d18dd820adaba453e14f7f5c2. 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/QZNJX2497933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1610d665e48ddb6e1a7c4614ec8cedd8b8eed9ae34db25f1a5b5d096ab376a. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/ES06F2403203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67324417edb4581ca53a7fd031c1ca4b7286be803bd3934f516ec582799a9108. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES06F2403205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f06188e65efa8bd9cd6de47a5868a91589b7691fe2763df0bdf892f782bffc. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ES06F2403206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238f9341afe86be43b80881056117cd6e9a72fbced5fd857f3ef3fe5ab181c95. 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/ES06F2403207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1610d665e48ddb6e1a7c4614ec8cedd8b8eed9ae34db25f1a5b5d096ab376a. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/ES06F2403203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67324417edb4581ca53a7fd031c1ca4b7286be803bd3934f516ec582799a9108. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES06F2403205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f06188e65efa8bd9cd6de47a5868a91589b7691fe2763df0bdf892f782bffc. 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/ES06F2403206.