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 0x2c87528a02c3074e7f8d07a18c6f347b0c5303e2d1b4d76b83aba3c323b47126. Chain 2 (Bitcoin): anchored in block 953936 (2026-06-16T11:24:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fce288c-6ccd-4530-a9a8-f6e66da6c3bf.json and https://artists.proofprofile.net/proofs/artist/1fce288c-6ccd-4530-a9a8-f6e66da6c3bf.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 0x67ef32d27553d721c97a662b9b4f781d0b75f6228296a34c2043b89a8067a9a8. 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/FRX762061119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad12506c292885428d1751f5f02f08d656fc473188b4d080f486c84a26ca51d. 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/FRX762061121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006f12b884df89e408dbddfec8437551b55c6d250f63e5515d8c90ffa82cd7bb. 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/QZ8DB1700297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62c84565e012bfb141571dc92c7d65a8c780a21dc26a3f8aac64d9b7da16edd. 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/QZ8DB1700298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa361154620cb775bdcd9b077e95e3d0e416fa1ed460e937e787904c92286f0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ8DB1700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2c493812c5b9d35d76d316ef68d50b3cb1004e852f43aa763fc6f98ac6c72e. 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/QZ8DB1700302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd044d78170d2723a2044220f6e39a2bf997db6a685ef67fb24870f2eeb17fb51. 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/QZ8DB1700294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcc3df6f5cd3792217dad139376f3df5e8e2e1e147044e6ba135853dbbf5891. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZ8DB1700295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83564e64e8e7ff6b27b40fee590b1cd2c58dabdfb058c4e41266639185b52cfe. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZ8DB1700296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8791cf158e931b98c90ffdeec8093c472f4ae52dabdd6b311c07cfb1b7448dea. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZ8DB1700300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ea4bed34d80cc780cfef46f719fef3ba3937aff5feb7664e5ed7ec3f703c13. 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/QZ8DB1700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0358e6fa1422f5f0122ec302ae895c562df75e38c90f9d62f0074b1733a348aa. 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/QZ8DB1700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45338bff02802bfb59ae22ab5a359fe5c25e5d637a66be9a90fc026e29ec9918. 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/QZ8DB1700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d21ab9f14af383b7b607096e7e23e5ae45c5ab1b701652e54044d1401ab6cbc. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZ8DB1700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b2d1606416f71d262a5bc2228713c37143b55b98b6a7da81da6c0cf5e24215. 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/QZ8DB1700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ecaf445b8e9924e88068f3e92cbc39efb0ce15f0755123941249278c4bb594. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZ8DB1700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d25c8203fb0b8a3dc7261034d20a094e154a6d9dd15c1ebefcebc28c7a3372. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZ8DB1700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bb486cc6c3ec5f1d6e988e61fea6b936e671637df1d2ac8a801a77e26039c1. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZ8DB1700112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76073487011e3df6c16247b3c3af7d46c4818209226ea53ea7de7de818b08634. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZ8DB1700113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cdba19ac14c9dd5c9f2e2d354cda66fa1ef2da1fe6694ea9e7ca8317fc59ca. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZ8DB1700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fcfa75005953d408f50ece951e16872131a95810ba433cce935c2d73e0b96d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM2PV1685105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2d26526eece4282500fc5ca1d702184a0264fc98f22e47334edd655c7d9d3f. 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/QZ8DB1700455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9c403902899add59cb1526c7239c89f93d9dcff752e89db5d74597d317e915. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZ8DB1700453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639e91746d2e23f5e091d7a7e743c1006d0b1010552e4f6479e2346f0ffe55f5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZ8DB1700454.