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 0x7d12d64baef81794b5477174d5fb74be02644abcbedf3c2ac75861c45aa72690. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11c3b0bf-c94f-470f-8fa1-d9f4c7c035e2.json and https://artists.proofprofile.net/proofs/artist/11c3b0bf-c94f-470f-8fa1-d9f4c7c035e2.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 0xbad80c3f7ecd6891103c7f926df049ec79bbd1eb778ca57976f35b2d1b6b68f9. 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/QZWFN2362704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89fa8a0365800aa0d7dbf16e9bc4915ece1a70fd631b5dc6d9bb626004fb62f. 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/QZWFN2379657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7367a37a1e95f3416acbcbbb3490030ab2dc7f46d3f055880155395bafe2b6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFP2309102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60109c18e58b2159a3495edb2b8c37b7d1deab8a67d012554e1f7a770128138. 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/QZWFN2378558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec598731fb4aa8e639b21d1739378e8744798880b2b554af432d102a743809e0. 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/QZWFP2315575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72aa1c85d874a9ddcc396a79804ea0d0e50cd80e45d49f0a90506ace6354a1b8. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZWFR2317914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cffd7f2bd1459943ecafe94895e2f19dff21d34079375ab0004760287c7dcba. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFR2319174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98431e6c7c3b0c405648fdee1d10299e86fd4d1c7c1bda026a6f0abfa0f5eb04. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFS2300540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb9fe1e48779483b52528110f072c6d0b636e17db4c47a1f5cd6eaceb8892bf. 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/QZFYY2488764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8417cdcbee7c74bc444b87ed978d279783f64365b760b1d88461a421ae3eede2. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZFYZ2438219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda0ed77d092adaa07acccf7720b74cee1b71d8d6e5e76574a3ef9ab2b416f82. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZFYZ2474827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf7ba5d272294b9aca0e7f2c8d10e52b82ca46752f3601d63fe0ffde0e6e273. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHN52468988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b1c9ef959c82e98f5e1dc01a0712127ce5e997b90553e20de4d1adfaf3ad7b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN52470976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e1e428c9ac8130e1819550dfa52c05456b92817d1cfd10c2f93cb4b16f9872. 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/QZHN52470955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820b4ea01eab8d01fb3ddf12964092845d13eae801f83049331a5b3a5fa87876. 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/QZHN52474506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68297596f4c6b76cafa7c37a9b0fb77d6793dadb4f84c1b5be2d9c6971341288. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6G2440052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5571cdd059f3efbdef349b38892306fbf31698664e5dbb6eda163d8e291fbe. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZK6G2438652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ef8d8b58ce79417361c03c48fd2e27ffb6333e711624c81129fe680a4e89c0. 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/QZK6G2425405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e457256c36f7ac82d93914ec6ea9951b8310e35dac07d142064d988c070d56a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6G2424620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31df4f7924c72f4ff45a7eee33bd5cfba34560462fc0a6b7323ab11175065ac3. 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/QZK6G2440049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe612511372d5392a234264445573e0ac07651a047e852da2f4dda6d56363a91c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6G2425403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70ba17c3ff78f21ad6f4f3d1b1c264cbb0e9aa26e6bf9c5c52f4577b5027705. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6G2425399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc511b48df7d8560d4e7fa1cf12f00887367b31d74e5f8ee59b7e17ab86afef86. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6G2440047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a56ea61e1db341dde80955ca74221e09e0d27b9b284e10e937d3686f4b9faab. 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/QZK6G2425404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca663e530b4dacfd0125b800ad3e19472bb19d1ab6e7b5e5b1e7444cbadc984. 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/QZK6G2461542.