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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18156b3ac5e0a90fff736545f46ceadb8b580c2a19c35a5bfb9a9cdbbc0f312a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6fc8d1a-f1a8-4eda-87dc-6aaa87198dd6.json and https://artists.proofprofile.net/proofs/artist/b6fc8d1a-f1a8-4eda-87dc-6aaa87198dd6.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f884d4db5e44c1b85ed58786f05147390ebcfb41c81f24e4897a07e0639ca7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2344236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfda6af26eee376833acc56f96cc7bda3d000e88efd533b13bd532075733a6d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2337427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdc1ec8ba2fc8fc2903fd524310cc680447a76559bfc0eed640f6b3ab6a0f3a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2337429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c687221167f19d1faa3882fc7e4c5f8794f1680492b05338989fb2406468913. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUM72103468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db47d648726287b0958f317e96d54410311d64b44befefc738a4d001ac278a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM72020494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c5cd30a89f2948b65b30de4dafca244928cffe6fcda7bf0a5e5705c7ad1223. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72014128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533b07e67b7c62069ed6517b49d01d512f9a51466ce37405fb458b158994d27c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUM72008785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4ec4369ec4dfdc4b2669f909d0f9655d7e017aeb18e8c5d7c457ae90a55c2d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUM72014127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1187a7b81ea03e4d8553210b4b2c7fd34b067bf1c19e8e4fd68a2119a5364ac1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM81901936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4da1adc2d7ecd924d1f54ad9274d0c01e203b8944eaf38dd5b681fd5ec033e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM81901937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ecc0f456deb20f2dec38c83b796d2ed2ab5916998d61900e92eb66c1582c0e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM81901938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aac7ff2596bbeda9a963e65c07e495ba5759346e11e7ec3542dcb58913fdf8b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZAKN1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced4ead7e8ef68fbc485fd9a101fc19a1e0bf73c3c78479a979a8147449bc795. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ4JJ1629162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca015047ef73227bb0100e84f9a658c4091cf6898fbc56320b6f82751fbeac4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ4JJ1629163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac255b61d1ad35cc2d8c44a951ec86bb8bb75eb32ac023db3d205a26f863d34. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ4JJ1629165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2109ec88ef6b07938f9a053d3bef2ef5779f72f24fd7b7cce1a24aabdc5b5a19. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM2PV1607689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767a476621be0ff6dd027f82266eceb0eaabb09271980d570afaa8d5b8b972ca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM2PV1672567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63997b94fc77b8f647d852e175b0bb707181c876bbd9d351632f7a30d9a57711. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US43C1624973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4437c0f84fdfb90b519aab46464a9e12c226bf96c4a8f76fe14cc7cbe52556c0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US43C1624993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fed31b5ae78978cd5521c2dcab3af805ebb4a4bc7bf0d85f156a0cedb544ff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US43C1624977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45d9bf9cb01c6c5fa02398d0343eb11e2a60bdf81fa3b944c76ab7ad94fef52. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US43C1624997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3862ead3a4b7e792f203235d3784196b72630eafdac9b33f246c30abdc76fef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ9JZ1784998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7be0bdeae358ed9b8bcb335b80be87d142fc6e7270971e12b1d2cf08a4cfb28. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US43C1631369.