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 0x7399e1bb51469e0a113a37e48df4bc94002af8536458047051b6e481430708c5. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f8c47b1-bbfa-417c-b9f2-896decef8237.json and https://artists.proofprofile.net/proofs/artist/0f8c47b1-bbfa-417c-b9f2-896decef8237.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 0xed09a14e9c01d2845f07cf872c6c20c29a33c31e77f4f450c1108cfc691ce9f3. 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/UKQJK1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c6535ac13780fd923e8b4232dc549774b510ca0a6c5a10d6fa11905c0feca5. 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/UKQJK1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d61f13842dc52b6f41af2de67e8efc9af07b8c0853b85135a2b29d490b4ec61. 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/UKQJK1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb57dd6c91810a7da59e926dc89ee8111cc0582cef76f20bf55e49d4f01f91e7. 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/UKQJK1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d2991f3a0ce1553f6abadb4727b9697e18493326a63651d8ed22613402dfa8. 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/UKQJK1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bd231477006ef2055e3e586c4845f7979eb11fdefb6ffcdd3a10518eb66917. 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/UKQJK1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2b873fa76a82056339ad67d566d4ec0355b443aaf480c467c751fc10530a28. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKQJK1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6855359e195d74b02d54200b2759e86c6b0f85329b557ced1afb59d08f008e5. 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/UKQJK1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0f1e5545c3240b976f7a598b70f4cbee4ff49a24ab549fe32f24c841d76222. 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/UKQJK1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c758533945bb702f25b98c2298c147d16a2d859e63ce93b4d8b48b2a4cae3fa. 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/UKQJK1800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d2413b46b1f9a9d2297f55b1f0faebd62c53140635836fee5fffd42c2d4931. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE5XG2173301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856ca481ce41280dc88d7a5192ee422d637c27fe1d17f87f2553f8c300b5dd89. 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/QZNWX2109853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9631a8bb5e99e1d8709214d9a31107a3c827b8b539383e9e46f2aa782fc666b5. 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/QZNWX2109854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b003ba3ffc4233bec8b8bb4b62aec982c98561daa4f65bf69b2e8cf5466c50. 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/QZNWX2109855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5916390303216ab75c900eea5c9499ead6cee9f5e97245a40bffd74ae8de960. 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/QZNWX2109856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32abc5b720278141c1639774828771d2b76794ee361ac19f73f92f42b87441a. 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/UKDAB2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683bb5a03688dbb464a68fe63fb239430c9d46b1b4aa0df340bba38b86aa6021. 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/UKDAB2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea946a06d099252bb9acf23ac5cfec6d8468b7c0ff5f405a41b775c0f390b74. 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/UKQJK2310600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89fcd4c09f4700475409f8d9138001e54139762dd3a0d5c3da1574d1cecef81. 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/UKQJK1800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c758533945bb702f25b98c2298c147d16a2d859e63ce93b4d8b48b2a4cae3fa. 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/UKQJK1800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b5192de22d82278a301af5e192dff4160ffde8ab5f137fdae21bbc38f5fe93. 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/UKQJK1800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5880d3518b134d1903be028982d429056de00041da0a5db95993082527496930. 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/UKQJK1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc754ecbc7efaddbe90c59c3f924a4e7056dac858c6b7f1bb6e10f6a9250e08f1. 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/UKXN22245880.