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 0x4bddd38581c3a83fc6f0b618b012a8c48bb440a058a639953166f3dd6976d8bc. 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/be6cb39f-6bc6-4511-8e6e-f0298e4871c1.json and https://artists.proofprofile.net/proofs/artist/be6cb39f-6bc6-4511-8e6e-f0298e4871c1.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 0x3f12a6fd16a3ab5a438f1d24d19c11637f2b10fc9161de142fa4205096509ef6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZWFN2490252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd9755390f7444b524d7171faccfa54702ef57cf589fe0ee8fa173f2ac81319. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:39:30Z), 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/QZZ7X2479731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e51863d08e60475c16d376ed919e97c1b65385356e26b1ee9a6724263420c8b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA62586286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1f451e34080eaad523e8ced2cbf48f21827c9dd7c22128644d326d5f338f29. 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/QT4K32582712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f85a4ddc843e50282d3f80c494840758e5ab924ec748b4451bf3c817190831. 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/QT4K32582714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f5f6269c5354209375f299a36902dd9d707023c7d1b818e8f9042329f4e80a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT4K32582715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4df4e536140ce1f168ca48343c699c256cffd4fd8198d204ea12dc0e2c9646. 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/QT4K32582716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c169eaa45d57bfffca30985d58a740024722cb7b03f5b30f8aad43a2920c9ee. 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/QT4K32582717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe5d852040d874a19035cfad877964daea3b97d9f7884bb9ccaa0e588e163b7. 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/QT4K32582718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4fe37e772387897f086b979a73ab66390d0a450a77c740a9078ab8387dbc90. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QT4K32582719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a83e2d930725a21cfccd852813db87eb9b59cc1aed19e38c2bd5bea1d2681ee. 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/QT4K32582720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fad887963a8417e3be9e2ecd9c495551520daf63c44d7fec7a2d3ee166374dc. 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/QT4K32582721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b6261df517d15d682a348078552fff38284cbeb80a5dfb6d8af4e862b3139b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT4K32582723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c270a967e3e1d9c19f3d7fa3899e8dc514cb3f4e0f26d40a3d869674595bb2a. 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/QT4K32582724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e58298d74de19c1413d98b2278a6b3b548aa545520f797353d33f0c9d47aca. 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/QT4K32582725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978a65774c3ea8842049bb839cb71b63a4c5fce21b91f322bef409300bd6d419. 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/QT4K32582726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff885369d76d50f5f759923a0d5231220979d32a1fcf68c6fddd60e3eaef071. 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/QT4K32582727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ee0f8540e6d98c534d6aac7e87e9147b44387567d5b432429ff367ed6da529. 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/QT4K32582729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbcca084da837066244bedbe8e20ec6165a607119c021d2f1f5750043837e71. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QT4K32582713.
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 0x05f02c51ebc79b12130cc340f881474e224b86e90b407b26fdf1494815ca3df3. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QT4K32582722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24186c2722ee8035304ef6c71b4f742aba2ecdb6cd8f087eb445d649ffba9db4. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QT4K32582728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe746b7e6472be0aa442161cef89d70a59048d4bce1687ff9d833b17a28cb1da0. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QT4K32582730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39b433b119d3ba2a1fd94c5b2ea16af1074bb1741754180db03ea41ade879f7. 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/QT3F32506149.