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 0xdf63dffd25b0654353511dc3f03a0af8f329c86eef90ca36034dbab8e720b3d1. 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/ab8a00b8-b52a-464f-84a7-b2a2af67efdc.json and https://artists.proofprofile.net/proofs/artist/ab8a00b8-b52a-464f-84a7-b2a2af67efdc.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 0x4c22cffa7bbd5e70399de7c7bc9792a6c0c7ec68b7c7f90f91d480f0616630c6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKR6V2071372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dc8aa387d81018ec3d1c41b6e675be176193a9b08db06d163eb3862ef357bb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKR6V2076567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2590fea5a5a6dbefec5a952cde799200a78e9b1895364354ae5064c311ae5397. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/UKR6V2173117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0eb9d119d2153f11ced0469850e7984b25e7909b323b3fb4007292f39e6d5ef. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKR6V2173119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caf590b5588e4acd08ab0dc6e6dfc17f8e6244f375937dbd7d8335b048a77cb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UKR6V2170267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1735f4edde21170e72f07c24f7f9de4ffce289e21eb948bab8d9c6d4488b28c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:08:51Z), 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/UKR6V2173120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d130e8a074b11a42e885f9e525756f8e3093618fa75e4fd21d2586341df0b66. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UKR6V2173121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36421b894fe3d1fc36b9765f96a706ddecedc7184de52d35a469ef08caabbdff. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:03:47Z), 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/UKR6V2173122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf04209296059ee2b3d8deb9144451bfecfde41f40245b03781ed36886ac5c7c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKR6V2170268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49fe0644b58713ee7c31e8dd31db312fb3bbb0534c12dfa9575569e70f92b2f. 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/UKR6V2173123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5b022e82a97a4346eb3d7fdd2b765c80da0547cee6b942d18ff563621bd445. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/UKR6V2272315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f349769e87ea9e821312ce38097ce0aa6c88e11da43c35e83c76879948a130f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS2523277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1769e6db4dfd6747d5a80180bc710d7a55e209ff4e9d6076775cef47b215c9e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS2523278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3d42707181b0b337488b8f13fe9f3686813446c50a0e9431085a22dbb2721f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZGLS2523279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422b166c89f47877656bfd42c1e664f0e3b141705344ce3b37f09d6c3b5f28f1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:56:01Z), 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/QZGLS2523280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d31899e8d4650e7abeec0bec117db11735abb2206d35c67f074fb5c6425c88. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZGLS2523282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5da50811564d87e4ae0f693bf6486f6e22e90d0c907c2c447561b1a39c08cf. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZGLS2523283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f9e67dffa229b7310d253f081baa7fd65b90b22cf5a59b83e5f21a31faad10. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGLS2523284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f368f2ab777c7e54467af743f7c6feab31b2ea3cf30b18ae8b8257e3a780f31. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:48:04Z), 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/QZGLS2523285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e55542b95144fb78913ba10453992818e53d5a4ad32b18da09765b4ee2e0f1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZGLS2523286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfe2e65699c4592a1f542f01ae3e4b0abd21611e0b27a2dc00bb8aa801c0d03. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJZ2588674.