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 0x5257f93b450c9f4d00987dd72efa8bbe5f026e4427858dd21c67d3d238d57b53. 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/f2afe81e-2d9a-4d4b-8d7c-19d5fd5bff46.json and https://artists.proofprofile.net/proofs/artist/f2afe81e-2d9a-4d4b-8d7c-19d5fd5bff46.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 0x02a99a98258b422c462061d4e942d4a760959273c5a392cb1a4152eadbbac63c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:56:28Z), 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/QM2PV1805198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c80086d4bbdb1813c6ad6c40611c81a1a2fbddb3661967385e11c67566ad513. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UST8K1841571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2679ab549f654aa346b03ffbd0922543d035ab0a957f31b4c6857573aae023c7. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:04:03Z), 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/QZDA51935564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d87054f89d480ce9e56ae1d1d03977c24b090231ae921be6cb47589334f17cc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA51935570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e6ba3d1ccb1680c556809f4c377bc7f1d64073fd4cef97b296892a64692dd6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN51972708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad38313d4ba766a619397ad373abf20b38c91296c9ba053a1efef755e831a6f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYW2088586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fba5c4ac18b480635b645bb179cc88d739e7650436e674513757e31eccebda7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFYW2088587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc811d0b3802c3d7b1b33716174a766c5508e9dead963622fda1dfb54ec0c7dc. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZFYW2088589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04c882ebff4434d3856eb82ec6de934fc7d95189368577bc8dd5b57da9cedf0. 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/QZFYW2088591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c98c0d961b7e5bbbe2e23db5c9bd0c3bff37f6b55f97fe04c9de9a5552842f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNA2019096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1f9ff66fcaf708749dbc43b74ba89f31351c7850580b25f393ea07bdc28e01. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES52156097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe675532e5d9194942fd56c1d61860f935f8946aed42c7708cbebe3c459117535. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB32415323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bb481858779c850204e59954e03947883eed8193f6d2a2c01b2999b4b373c0. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZHN32564622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f65c244dc9aa10630edae43d443376645fd2731457316ec829fd51cfe67a4d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZZ7W2549934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5ad9603e6974fbfb067bb4974bdfb0b6aa2bb52b1cb2c6e18b65c4d4f767c8. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZZ7W2549935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403ab2541462a0519523cfa23d8b880fb03c631d244f4aba3784a46b51f1e6cc. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:23:16Z), 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/QZZ7W2549936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61580f128a6ab64e44c64a487b510fdc3ef48b217d5dafbda0de4d5ba071b6e0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7W2549937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfa64117cb10847cdfaa4a1e41471876833d397176c11722df0fc6342a20bfe. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7W2549938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956d05984f90b7f32a0561022f1b48d80f0352b2ca43d54112661c000196eaad. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7W2549939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7730ad194b2a6eead3b409eb651c33854b9abdeef1867326b2ffe811ec4bba36. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7W2549940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f8c3fa6ad740f5ae624a8d9300f3ebe3be8d3281d70038b253ee90c4cd9dbd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7W2549941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455b326490da55ae9aed0e63f5227f4c9e83302567c9732fc5fc3b0720a596d7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:23:56Z), 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/QZZ7W2549942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb71fe22379e6a6cdc99d930c6c8425db6c39ad66d7e98a0f4adf37414dec633. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7W2549943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f618c39698af6a2c626f9541d26b2678cb11f2d002e6160a2f78d8c2d6e564. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7W2549944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc165a6d749d51480bc5e918806a194983a4c4cfc9755c43c7507169b418eed. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7W2549945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2195ceb6ff2512e6fc2712cb7e207cbcc7fac48eababdfe47ae6f5f50011089. 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/QZZ7W2549946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0eda5516140198372a9cb65a186b8835ed04d6bf529f25b85b42c906a97baa. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:18:14Z), 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/QZZ7W2549947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd4623ef59d8f848f32ceab1ea9ca92b7316c8ce78947d7eca31a90d577061b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:33:41Z), 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/QZZ7W2549948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e15cc4275f17cbe554a1a30b1e99134a52ba9d705f3f815ea2aa42fbb45d047. 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/QZWFJ2314552.