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 0xd76c444a5729ccf6234500f184604dfcb468aaba2608d9a3189e1d231db70dd6. 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/50dd5eba-18d7-483a-9113-42921813167c.json and https://artists.proofprofile.net/proofs/artist/50dd5eba-18d7-483a-9113-42921813167c.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 0x6ba93a4cfbf50a292dd8c82544c34a76b3af7cfac5d741392e1d11fc529e5f59. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX4R52544828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0141a81d52f81cc505df4963856d53cbf298f2d21eb8ca07b2eba30f724b7253. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX4R52514266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c432bbfa11982940805856363c80e1197afa60041d8b4dbc57dc11fae5ccbf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX4R52577562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfe5c30619c87bfec963afc896dcf0ebc43add6f7eb8c20e0c4c594574fede1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX4R52595871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196831d63161863314850e3febd2d418f7774050082cf08607ad0eaafa5a8d94. 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/GX5MY2596331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47927913f8091f1bc322aaf800e85f7e2768e8aa91cc47d86a9241ee3f1fd935. 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/GX5MY2564371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3087bce8a25ddab66fbc25c42e730aa0eafad48e795a28e8c432bf5868c83720. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GX5MY2579689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f435c7a70bf175945006d830ad07af25b70e8fdb3ae69cd7d377111aa8726c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GX5MY2547602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec890bc7cffcd9b1bd019e547a8f9e565147c6c71d4030f16878969b9aa5f303. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX5MY2598693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df80851eecd7b9993ed1528194ba955bbed6febdc2abb9ac8c705d5c82f1430. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX5MY2579199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdb01cd08364865801e59bd9d5c29bfc7af7ebcbf4f987bdf06da787ae76f13. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GX5MY2541932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b47a0e64328014cf0a97ab000cb320789c5b7d6b69bbe6df3990c80b1a65c13. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/GX5MY2560648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c292abbb9adc34c5d2444e4d240b91ca5f98e79260f5dd14145138d755d97d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/GX5MY2569622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b059127d78a02e987c0f1593a743e1b890c45153b41f167c714e568afd15c1. 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/GX5MY2578273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1b6c00d76f05685bfedc6ce81e270b1e9e6bdb218c07fdea1efc2924dbd6ba. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:37:30Z), 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/GX5MY2571282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbbd229905793d5ac5bae8afc920afa50a48cf48681f30e44c038261afe24d9. 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/GX5MY2559064.