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 0xbeb0f61a98d45fe9f86fc8ab3189cd716403f2f41a4229e042eee178a7e9185d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cccd761b-6b5a-4813-8b40-9934f07a5661.json and https://artists.proofprofile.net/proofs/artist/cccd761b-6b5a-4813-8b40-9934f07a5661.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 0x71e5cb505ff30b4e97af24582ba28e8448ef357e047bd36c4018b5a5d1d588a2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLUU12100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ab528eec5e926c102ecda81579fcad6c8b95d1fd0d1e94198d9977ebe49ca3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NLUU12100291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1143701052ace94521008431900aaf44793aaf4fcf9706de66e451c5b008fcbc. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NLUU12100292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaa1aa09da0ef591f9c3c28f58519509691b1b10a52a878089ffabdc38df5f1. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/NLUU12100293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f55a14355f8c8d2b3701f24bb2d377ff78d2b6897d911ff8bfcb12d3daead8d. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/NLUU12100294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8854e82271ee1eec397f28e517d9486da0403d70a39f04e013485fcde50d0208. 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/NLUU12100295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1256715eee50c3787211184ef014c2f1c538d4f6da794ccf1e59e47ac8dc6624. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLUU12100296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedec4de6b76f215c845b5cef9629b2a698f88e4909da1bc0beec781f3e63f846. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/NLUU12100297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e3c88bbc1b6d50a12c9b55dff2af73c8f5ff9492055e6332a6ab53cfb03cf0. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NLUU12100298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294816865f1e220fddb056e08acb0e2b80b07c7c8a322afdec98729df73155b4. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:24Z), 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/NLUU12100299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7192105f4aaf73e9619c22415b4c56e393ed993c8ec0557d0006dd778196422f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:27:05Z), 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/NLUU12100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc35dce5fb5bfd7ce35b7e1b2d94dab082093468342f64d33549a123c7649f1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:32Z), 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/NLUU12100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4f174deae1880adf81807c1370375b9a6a072563c71f4324b910676277bf25. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLUU12100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d4da68e0f6ddc60caed3aa19f470affd7d7db388b22682f9cbf8e1777f98f7. 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/NLUU12100305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf823ef366b9fd1119967046c191af0133bd5580bf4c20631ac8cd3cd0f78e5c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NLUU12100344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57f8d2ae9b3ae90c792851d4c0a4860c4dbd80f7dcd850b13a61c50d0893f28. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/NLUU12100346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db5ae73297fed4072ca057186979a91d2da569685bd0d30a4bee0737c9f76b9. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:09:30Z), 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/NLUU12100348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024e2536d303743f97ef90ef94575db79fbdd325b7b87aa1ded8f878d215f7ed. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NLUU12100353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3da49eded51de5e432de75a5bbbbc7f95f5b830d5257046cf1821a0e58e602. 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/NLUU12100457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715328cd6f861bd5e6c885c3675f7a9921b4bbd7fe35e58275eedbf9dc4f73be. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLUU12200197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda7f6fef7072899c6b169c7b361d24c9f95a2290ad163725f2db9095bd663ee. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:03:07Z), 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/NLUU12200634.