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 0xa4ee971793f7ea4679e1f6fc2524b638fb03826b8b43e3a087ea5bba22981fac. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db6f1607-b509-4ffa-a1ba-ef4a49ba224a.json and https://artists.proofprofile.net/proofs/artist/db6f1607-b509-4ffa-a1ba-ef4a49ba224a.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 0xac82c6fddb79687cb9e17448e4efd9e5c3bf489d1689b901071cca2cbb407d89. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US2Y70100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1185eee1afb4f618772cafdad1c6cf3bc57e2bb8ce5db05c4524cd79d2708abb. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/US2Y70100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b71e155094478f81501ed35ab17f6d24b69aa7165bc3abd53806ab1b47df6a. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/US2Y70100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db748550a9c86ac8f556db7a1a108fecd818f0cbfb65018853510a01be9ad00. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/US2Y70100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea9dfb24b578d97af18f99df41778466f1a5a3d7094b455034f012e1528fe08. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:25:38Z), 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/US2Y70801910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59c304873268cda4948f35935b7d4d4f5ebccf1add551c5d1d6f354da67a1fe. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US2Y70801902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5358140d436bdef2cb5f8e78130c15425f1f2163b33cd0a1850f4af0066455. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US2Y70801903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c400428a1efe7172806cf169657554ac304005c95a9bf5cc55f3ed54a886665. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US2Y70801904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2776dcb3c4c937773f30b43df6b47902b937bed62ba2b9231d24ae33f0eb86b. 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/US2Y70801905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf1524887f281860266d7535c6c37db8a24eef7d0f08bebb85fccca448f69f1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US2Y70801906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919c1dff4c7cf01411b050c8a6380bbe4cdadc17d0fe02b294e16072dbcb6525. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US2Y70801907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a15e8d423d21d2865fda6a2db2234bb0694edbcfc405a474f37e0725af10b48. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US2Y70801908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7809336b6ae16b7fa0abc05d57ade46e549dd84362517fc9ab3269a87f8021. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:08:42Z), 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/US2Y70801909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea9dfb24b578d97af18f99df41778466f1a5a3d7094b455034f012e1528fe08. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US2Y70801910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7adc99a18e2230224b4f877e39a244e9ad777dc49cc9de6523e2982d63d7047. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:26:05Z), 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/US2Y70801911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3d8aa056902c96ef53a885f34bae8dd484a70b688ff7d0eee2fbde287352ba. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:03:50Z), 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/US2Y70801912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277c59e3de5f3bb0889e353c68490d4ed8d53e2f23401dea90ffc22062fee166. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USDRS0600501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79958718d243836eb442345413a5aa596a60ecafb7f0480204a29b983de31ad2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USDRS0600502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb50458cbdc0b8984b9ccf66e3e04f3ef011f0c3c52d6bb32ac4b5ffee2a2a7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USDRS0600504.