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 0xb51188e296970386d9cb79e260d11dc3d68c8003c29c578d992da2e667456ae5. 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/48d18804-042a-416b-8094-dbdc5e04dd81.json and https://artists.proofprofile.net/proofs/artist/48d18804-042a-416b-8094-dbdc5e04dd81.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 0x6c8be109575d37450131e44b30d1cad39a3d4692b8ea939389ae8a0b81e6a31e. 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/QZRP42225555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9219145d303adda123dec12275013a01345509bc2a811dc653cda1f09e009d9. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZTAU2294099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbb04c5cb280c28c9fa205b1a0b317afd12afe10351640b5b98db3309c1cdc5. 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/QZTAU2294100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf367cfa4ff082d83e46e3a56da1f07e1ee0fe90a6094a55c9c389feee47355c5. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:47:36Z), 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/QZTB22260512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c767d65c4d356b8eacda9eb1fb7d56eca2cb94eafd6cc6ee0e62b33ac17551a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMEP2100482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef5e4acbadd47eca986155e8b2f67f823e33d2a8ea20e4520c75d31b6025fc9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZK6F2230507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c60434577db143308e57f61c0bd77313b8737bf90b3eb94fe1b7fc3a68f120e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6N22374160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c60434577db143308e57f61c0bd77313b8737bf90b3eb94fe1b7fc3a68f120e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6N22374160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe030bcf7d867eab7f35d8dcc757ff2abcfb7b203e8a98cf7b612ed1248e756e1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:32:04Z), 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/QM7282356029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c94ef8cf09ebea1bccc6ca2793d5bc8721dc17a34a5345a5a1e4339d73b8dbd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:49:40Z), 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/QMFME2378204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c94ef8cf09ebea1bccc6ca2793d5bc8721dc17a34a5345a5a1e4339d73b8dbd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QMFME2378204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb40d8c528f0bdcf029cd4235e5564a75c7646bc424a1c3b6df2c885f530807. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6P42445396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c21b7a4ad53fa9b6a9f59c2910ed427ee088c0d34a324a8f7c5529a654bae0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM6MZ2548685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2537df200674c1faa4a75782c37e9ad6e2458ff8770eebbdac819e54641c9464. 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/QM6MZ2543637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe2e425fa9be76570792604535b9e5da19580b593aa537ba950cef4bac77604. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM6MZ2543645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73e1e9788cfdec24ef7aa552792eed4bebd96951b7df74cbde476570a7b3ba4. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QM6MZ2543656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e68bd9ffd028297aa2ead783bda97ae44ce32360351639b972570e68a86554. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:47:05Z), 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/QM6MZ2543666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07646a3953a8d7742f57f9fe8860992d537067eb9f3b81d142f57750fdb78a2c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QM6MZ2548651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef905f4fa323bb2abd276f6d75882f8006dd8920f8cff4a4dea02bbfda6b29c. 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/QM6MZ2454016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f882149151bf76b9aed36630aec4ba2bf4945d838ecd61b3a559d6583b38b98. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM6MZ2547329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f9ef8c508b85ab842e49a308760117d40352fa16a990a780fcc0703b1c86ab. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QM4TW2576175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d80d627d09dd1b3cdcf0969b05d37722cb308b8b84b4774409a772fea2531. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6MZ2547341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54eed8fc65de5dbebb81dfaf96b1ef2731abed05ca274921d33ed67af5a398c7. 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/QM6MZ2547360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f948209455d85bbe1613033654ac4416a7730b8e164f33de6ebe8702d73390d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6MZ2547392.