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 0x0ea25ee28c77f05ffc5d2a22b74f298b3714d6e1174db68daf9c0d19454f9630. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/821a4ec7-036c-485c-9944-49373ed5d215.json and https://artists.proofprofile.net/proofs/artist/821a4ec7-036c-485c-9944-49373ed5d215.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 0x260204e4939eeed892cda94f1b5d58c26237827ff35551710e24fca664c0f1f4. 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/QZHN82422115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98374d3e9afaf9d837d3c23867c91a94284868db03208a24cb8eaa05498d9d2. 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/QZK6F2307937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b205faffbdb131b95fd12b351f98b1b2704872c12ff1ac3116658d56fe095d. 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/QZK6F2307942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fc0f2fac2433c686250c8661c4ffc8fbe6370ad300640ef4d8ec41a5e75c12. 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/QZMZ92355704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e3b0dd38ef7a0da5ca655baf22a0408d6cdfbdedcfd060d042263d7d068a34. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6F2307936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3e6139a695b62a58c9e603599514a1d7c20d07cad102889764dc4675657909. 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/QZNWR2211829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283da30d6a189b8fa67618424b7ae1208ae88cd684ec8e9fafb37228021fe9ee. 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/QZNWQ2219169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66c73d5e1ee6223d4debc218ae17962ea7a06210a8d9649a9b02b1bc1f21d6e. 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/QZHN32241000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8183dedb4c08fb8856dc7d83a71dae08b8129655ab84b96a490351e28c099312. 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/QZHN32244711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b7e7b6de316c9f52899ee3bab5703dedc89e753549e621d33da7089d9a5732. 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/QZFYX2292070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe1213a6ba05b4a7950792629dd8c4ad18f419d9fc701a7960397955dcc73d2. 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/QZPLS2180535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6a3e4913bf823495d75874065a241677363ff77c40a0da9e61fefce24b9597. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6L2109409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726d47e7c32e60506d183c056b18096259cb748fb90c622a4f1645228b9c0483. 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/QZK6L2110476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a63ea23b2fa636a89d4635dfd20b32ce711cafb5cacfa560ff4d325f0a42df4. 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/QZK6L2108198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fb55edfb863354ec585c6669e2c05d54e03a1e5196c61844abc523b3e11f98. 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/QZES72134702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af14b59b4b7f1c933804da327413177028a0d90889d4cc5109b11a315551b42. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA72117302.