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 0xba1ed75baa891a58b8b90ddd20baf4bb978d7e666104dd347a6019ceb1b86a12. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66d65de4-ac3e-4a9e-a5d7-8cba1f34f8d5.json and https://artists.proofprofile.net/proofs/artist/66d65de4-ac3e-4a9e-a5d7-8cba1f34f8d5.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 0x2d40d662a0b7dfff7affe504e74591edb3925378d4bb3dce72b80a353c559a70. 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/QM3DF2203041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26cfc43cd49682fcd8f688e613afff767fa30a524f272436f5cd974fd324014. 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/QM3DF2259439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46160ff9460f1abb8477d8204cf38cbc0443aef6a26a3c9d79c0d5ac69fc5493. 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/USANG2298911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd924d33ecb999427a42e533078a0348d17f1289d505b8a7e4053129630ed92f0. 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/USANG2298917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56a2f3192f7c191f07ea577b713b24a2a37ceffc98da1b9be05e030a1145109. 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/USANG2276955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3b7dcbfcae4e6015bad11e95138d5ec7575152b543a6972f5c4b1b2a928c3b. 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/US3DF2143054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7d819e58924d0c16e10b2cf43a6b3c972e5e490633f7e6a8e234c7297508ce. 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/QZZ972442567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6aacd837d763d18b5afd021a81b55a20ba4471ef0505aa67ef8695f7516a4a6. 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/QZDQH2377883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb974c014c967eaf38579a18a1077fe8732df4381e9ef41ced4fcadfc1984fe. 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/US3DF2247064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605f7d395f4e69e1d851a9fa45cb6a65ffb9cb2c7c58360ed1dce2e5b2b8ea76. 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/QZK6Q2178728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e75973a5a35f2bf822d6467e6c1e1c579ccc68b95d6f5b7c531ce60af977d9a. 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/QZNWY2087432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef25e31140f100e7b229985104254a762c845879246bcc7b2c2585cca92f93a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USDXS2008457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070937be7e07168651324d085efcccb80896cd139e3f81da744ddff183460f3f. 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/USDXS2011673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a20916edf553e307fe808bf7ae6ddfdf8513beb8c0b91575bc924752d926906. 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/USDXS2011691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457fbf31d469abe8eb88fb885aa13d3a5902c6c706bfefda126bfe1d607b3816. 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/USDXS2000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc744ad935030e2d2e32880eeea42e4642850783880d27ee424d9ba4a4dae63c4. 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/USDXS2000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e6ecc11043bda12c60d4cec158ce4c3f57f23a126948b50dad232a5e98af06. 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/USDXS2000200.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b4501e0b3d35ee17c502c82f2e2340f5a99007dca70ca02a503d932a0bcd0b. 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/QT2HF2400532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ceb9696f694f614a25873b86b012613ef45819c92ea86c31e610626ebb3819. 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/QZDQH2443861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e75973a5a35f2bf822d6467e6c1e1c579ccc68b95d6f5b7c531ce60af977d9a. 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/QZNWY2087432.