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 0x4c96ed48ee197b8ff400bd3bcc2e2592d194ec9f77d304712b3ad69bed50bf78. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/240adeca-eca6-4206-86fd-bb9635ae65a1.json and https://artists.proofprofile.net/proofs/artist/240adeca-eca6-4206-86fd-bb9635ae65a1.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 0xb1399ae2d0ec55468520ffa45bb81c468ac1fceb640bf53deda77338131b3262. 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/QT3F52521679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2849b5182a093d263ce2628bf20513a8029a4337e1d98f26fa5449ecfad47785. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QT3F52519312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60293f7d2c2f669e85a51f82c28fbcb4c839b6c67c96de0ef7af02686697aef6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT3F52584580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74ad6534449b13e9b18a1c1f223f62e2591d1e55c5905574cd59c26c4953eab. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QT3F52584299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27196dd62cf160bf46b8834ae15b8898e32e7b75a9ae2a537bae9d990dc875d. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:30:20Z), 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/QT3F52584489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ef70d029f8cbc358a5f5894abafbfe4d5e6fbc26102921b4f05dd8121b1869. 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/QT3F52584295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb3fad4ed68540759e3f4ccde310724885ab9b844a145a03b8342b66f45a756. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:35Z), 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/QT3F62599976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d834f9752a7e701ed6c1390d4d5b4cec66784c54a3deb03923992a61737f1ca. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3F62597258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917e9aea54fe1142a06b217623a1bc02883966c057b77c7e3fd16a1479e515ca. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3F62599965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d922c2d5bfd88ae90c8d10a64026581f9bd8d3141f6b907ab16aec2024aa94. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:10Z), 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/QT3F62599957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12844ffc69f84a9c8d7cdfa709d213ed5ede2ee4f8629bc556ad6e489e6b795. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3F62599981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdf11e0a32728c40bdc362675fc8be702c2d8a13b703ca13807728bd7a8adde. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:41:44Z), 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/QT3F62599966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6609c38bfee408f768696bb9ac9fcecdbd20ff9cbbc12ae05b10e3f30f3e06a9. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:30Z), 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/QT3F72502658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08d3803a72b1f23ea9cc726599fdc784087c58c683e2c4159d7b6d1c98dd536. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3F62599972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c9e2040bcc0067381acc19b55133bf449b61359e756065609d2cb3789e07a4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT3F62599956.