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 0x3d1ee809cfb1fa088d1fac5e93675d500c973551d777a9a1b8bf23eb689f5d9f. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9abf83d1-0dd6-4e97-a291-2a11f36b933b.json and https://artists.proofprofile.net/proofs/artist/9abf83d1-0dd6-4e97-a291-2a11f36b933b.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 0xb065efab79e3a1a7ddc092143e38ca084a7757a3b1344c0fcebfb7a7104adf80. 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/QZWDE2201291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b76dfaa5a2ed84d21ed405a5fbee62fcd120fd8ddf64c6902c3122a35b0cddf. 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/TCADN1860265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48460c0bd0a2291c30193c46ba5ab52a017537c5e0d7411fec69fb5b04b40d8. 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/TCADN1860284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6573725aa3fe4924477c5be604681fa857ae25414a59d74e852ead17eb51a47c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ7R42456168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0287bf8aeb3ff3863766c6c6620555e77ee692db64b90ce5e0be953733dd601a. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T20:41:05Z), 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/QZZEB2319929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91fa6cdc5533c9c67578d533dd55df9a532e76bcf3ad9da09f6313647128a62. 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/QZTV32337597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cf04c2eeb65948340953ec699ffc099a7f27e0aef2b26b8e30fe3009f93f62. 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/QZ5FN2304275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827f91ffa2db671d5d759381580d88506313de2e1ca198ac29908d436271ab27. 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/QZWDD2255891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ab4de86a54b1bd12d80648970370e9e478b7fba2e663e10139b8a133f3f2fc. 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/GBWUL2248990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b505d6944df54005a3b9a359d37b22e256df73345e2efcebc73fb48a5ba03d. 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/GBWUL2248995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7a9edbb33b0779a1ed2d71850a00c20c4de160861de9cb12fff90de1cc70cf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:34:31Z), 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/TCAFS2196765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf5543d11b65f244caa62d9110797ed2495f171a9a82e04ab41d15f4e08c54c. 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/QZFYY2058124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0287bf8aeb3ff3863766c6c6620555e77ee692db64b90ce5e0be953733dd601a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZZEB2319929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2723cb09b5ae8ff1a2b6b5ca4e786d316e2c3707ef31de185fe20d66efbe856. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ7R42556501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0a5c9991fce1fe1535016ca3ce0221374ddd4d732d617762e719818f9a98c2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZ7R42456190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ac09ed440f6c49cd85534836e83b49f4eb3aec1d1fd8f3977df3f59b5db962. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZ7R42556502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1d4e99f49a06bd38dbcdcad6ad0780937f9e8ebaa8a16064d9fd9c08a5bbb9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ7R42556503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e2f96df003544f1d6016e90fad90fc75bc811cb9af3239d989218ac14b309f. 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/QZ7R42556504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc4c0cbf645db2574298102aa3c4c3f45b6ef469097178c69a2b192a4e510f2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZ7R42556505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6573725aa3fe4924477c5be604681fa857ae25414a59d74e852ead17eb51a47c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZ7R42456168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d67725a630d2826d1733d43170545e8d3e937d1f162d60491546c91256292a8. 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/QZ7R42556507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1693e0b4c353031fdcf13d58c4a3c0ca70364d6a31557f2f39a6d9f132d73871. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZ7R42556508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431c5698950aa2687de1cca9df9ae1eb3767f6d473ba219533a7c7e169d2fc32. 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/QZ7R42556384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f18fc6e6bebbabf0709ebbc0a05d3b2a1b7ba3b2ef5d5997e66ff87b8aeea8. 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/GBRKQ2576953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7340f4317c2c15b64d42234acffc6d15305506593bfb838e02cabdd1f113a6c2. 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/QZ7R42556269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0a5c9991fce1fe1535016ca3ce0221374ddd4d732d617762e719818f9a98c2. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZ7R42456190.