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 0x08a292cec9b3aa74e5a13a00558d42b90126ac987ed7d5757086916cecc1495f. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8edfea6-cec0-4f6b-8863-a45a397c7498.json and https://artists.proofprofile.net/proofs/artist/c8edfea6-cec0-4f6b-8863-a45a397c7498.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 0xe3ff4de8a0ff978bfa16c0a76f5cc357935cc6368112429eb6fa372dc7bb0899. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USCGH2415778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3180ca4d5d60f3c33baf4939940a6c47825bfd103f21f26d0dcf50f1f44f0be6. 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/UK3PC1300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ef807d622b2ee43072caa9d17308b1db57a8375856928511ba21c0cc9ac652. 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/UK3PC1300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1713ad49110f3cc5f45a0cfb69b1718d6593ba68401d1b214ad6dda9831a427d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UK3PC1300392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f839bebae53c88b707c79fe77847ea8f36d0c13f2416835a45a67194d8adde. 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/UK3PC1300396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa682598a44689d9d63674cfc483eda4925b0abe88163c945504406a328665767. 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/QMFME1498114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5749643223a14879e1854ac0141e02fe88ddde3bce07a00503e69b330d369e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME1498115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfa3c394dc9a6a91c342155cdfb69a87295af989a7c8b800ca44015984675cc. 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/QMFME1498118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef918cac0b395aad669388d2d05248e445d256f03008d607c61932e052a8b232. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMFME1498121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa363fc760c88c5f71d37304950805395a4a4aaee5455ec0d4b35a871909773b3. 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/QMFME1498122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dbee1f91cc9fb7528ee03633a3e4e32f3d223b1f9aa99276c67eb577c01fa1. 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/QMFME1498123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d7193d86856b5f3e2171d0e188f16584a7def8f20cabe6c0960626e8dbe1f7. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/DEAW51422003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc039c59fad818cace8ef8a3b1d8847e4cd43c9040e0a869a51a0bdc337fe238. 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/DEAW51422004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fcde394488adfc0e213038f82408c22f38a82db0f411803427574bb5fdb71b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEAW51422006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb888270fc0f14653d15eb9c3a249b1691ae74d4e956d4d66120d70210b071e7. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEAW51422008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec0b1ec599ec59d9c7741553d726fe37079e590588a5eb695138273e213b7fd. 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/DEAW51422013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25270db65b0d134a86daf96d204f17762a8431331acdaf98e6de27fefc8da5c0. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEAW51422015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa333cd751bedb5bef5a3a047d14b4a06cb6c7162d3b453889a4d672000703d0a. 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/DEAW51422027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe64976736a971107f40ed2cfe0025392553a3f8629f232928976432744012c6. 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/DEAW51422030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab76d6e914312a19b6f62e730a438f3ea7b91549006f5b6894f95a3bacc7608. 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/QZ9JZ1740526.