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 0xe801f583bfb0b04041ff2af63c7b1ae7805e2f59f5752e4e09fdeefb20064c6f. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d89aeb39-7930-4182-8793-05f5288c8075.json and https://artists.proofprofile.net/proofs/artist/d89aeb39-7930-4182-8793-05f5288c8075.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 0xf96132d3b20a492651f71156489db6e2f700702429004947058b36bdef84e028. 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/TCJPC2409369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cb4e8eea63e379f5cc7e8818eb8af35f1c0785d758876106fdca87c1da9802. 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/TCJPC2410430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472872a989692c94d900d99af39476db90cf3437c391ce5aea0afe254bdfea9b. 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/TCJPC2410446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae7ee8717404df444ed964ed49aa1e7414da78759ec60bce1f88ad8cc43fab3. 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/TCJPC2410456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd2aa743ee14f887da061586b0a266bf2dc7336a6b2664ad892babe319c2673. 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/TCJPU2375321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d20e5fd8e3973e05df681d2f4cce4bbd77737e3819cfc9619e57fba56946d41. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T16:17:37Z), 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/TCJPU2374248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7ca03624b408cf8f3f9567a8695e2297127b54ab5107d5ef0b5dc180387389. 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/TCJPU2374313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef461c5b8ca585f7d3ed1f503d959fc03a86fdd00fca04b7dfc6255eae5a815e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TCJPU2374332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8d01dd894eabc16b7be4504db2414f96d509c7604745c79894552716d8169f. 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/TCJPU2375285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58c555e9f73af7844dc2d79e4641993dba32f6f1fdcbb2e0578ae871552a7dd. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TCJPU2375308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec05ab8fc4bb3f43ece60810be5f4b38f82fa8a57245e2fcc8643e750ddcf5d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES52552772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1328a95cde7971f9d19a81037fc7bc2d5774cbfd8db0b16a6dc57787726e884. 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/QZWFJ2436446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fa3696b1ac8d9d773a6641ae0acc5c52c435df882166b66bbe1dbc8286afb1. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/JPPO02003114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168a2bba0e159ed9d68bf66e1764ed029bdb1bee9820faa27ee61831915a0454. 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/JPPO02000424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e43f007cf23a11cec1e706e1a756ef341fc5b0eecbd066f1f3bd4b57d427805. 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/JPPO02000428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168a2bba0e159ed9d68bf66e1764ed029bdb1bee9820faa27ee61831915a0454. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPPO02000424.