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 0x962b9c1bc7908f12db9d1695f1bf73f1c844188d8dc1c9f9299f89a3ac10b83a. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4976252d-c488-4e10-8f6c-cbff1730338a.json and https://artists.proofprofile.net/proofs/artist/4976252d-c488-4e10-8f6c-cbff1730338a.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 0x96e4fdc47a6235c9da43e7a9261c5b86f75a6081785e6fbab5e70442da46f19c. 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/CZA161104494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e35a56e705e8f2fa5a4160aae1d68927e95ccae10e4a5950427c07d797ac926. 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/CZA161104501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7317e36a82dd5e43b5c87c6710df86431ce883025b658258a2d6fb3d963f6f. 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/CZA250800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa355516723d636eb8b580cc300003fcc215c9eb0b544ea6f7cb2d5dcb757cd7f. 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/CZA250800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2a41ff815c6f97f44e1d6fd7a9e211c1eec1963644970c15265c9cc0c3e307. 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/CZA250800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bc8e7e6e2826230782f69bab0897eca91ae962d7c4a1dd8dbfe3caadca2121. 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/CZA250800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e1e226a88d5d69c6c57d5884ce426531e5f66955cd03ef51e3c9606db1e039. 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/CZA250800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf5f73db63168b554ec003a8d015b372cbacf5abe7c82443cd585c630401e65. 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/CZA250800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f31f2b3a1eb64c1a3ce706ed2ae3456f4a8b93b1a5d088582c6df5511e63edb. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CZA250800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec80cbc5b8ee44986746cdc74212a6c42a9e7dd1771687d36175f228c4d74d6c. 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/CZA250800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b90698c497054630f7c37036f3d19cb3fb2dca884dcc4582a30a73d80a3794. 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/CZA250800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6940bad67735847fe5d11d02f3b7a6b88cd1dbc56ec09e266df4aa26480f31. 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/CZA250800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab043b237ed696bfe76871fea55d879d1638bf3ef4d6dea156db92a1e038d2b. 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/CZA250800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa304320859a34129edf874f669047a39599a288845b1ffc65164167f90847ece. 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/CZA250800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c2155b48db5f652d4bc48dfafc55d093b3f757b2cc77c55eee37f7ce4164e2. 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/CZA250800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326de1d22a7b20f01da3cf639239ce40069a2fe4ba3e8f5895342d5918d094cf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZA250800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65e73f7e1ea329f20fb7036e947a9fc1991f66a3f04e049e35f4c7ecc0e0766. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CZA250200949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2a41ff815c6f97f44e1d6fd7a9e211c1eec1963644970c15265c9cc0c3e307. 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/CZA250800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa355516723d636eb8b580cc300003fcc215c9eb0b544ea6f7cb2d5dcb757cd7f. 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/CZA250800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dda5bbb1cb6d411b9a392d5ff5037e4cffed2d366d24b7de8376d985dd483a. 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/CZA250300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7317e36a82dd5e43b5c87c6710df86431ce883025b658258a2d6fb3d963f6f. 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/CZA250800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cefea0f875017a7d373b74cf324515eda9db7ae847f065528020d3541721c4. 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/CZA250200955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6940bad67735847fe5d11d02f3b7a6b88cd1dbc56ec09e266df4aa26480f31. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CZA250800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4efc64f7c5c912dccec0edb77b7a8283b29ac543d4bd6fb8f941ccce9963169. 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/CZA250500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326de1d22a7b20f01da3cf639239ce40069a2fe4ba3e8f5895342d5918d094cf. 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/CZA250800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c687b99da944873ed12c24995bcabb83f6b939da1abcb7ef9ce3c06258a2c35. 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/CZA168400127.