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 0xf8a6fcf39f0badf80d59a96b1b4d0762e5a66376742b50bd186d752272b8cb7e. 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/6bb419fb-e7a1-43fc-bc20-d203bacf2620.json and https://artists.proofprofile.net/proofs/artist/6bb419fb-e7a1-43fc-bc20-d203bacf2620.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 0xfabd413eb7411aeb283e505f4bb62665fe5cde0d2d5e022350cf4e35ba9a5687. 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/QZNWU2308698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6063017b8e1339ffd73abf01a566d0b94c6a07cf58a515619a7056d74ad181. 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/QZNWU2308701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa538fa60eaa77b722cfcc6810fdfa3e072b70506b0ba523019988cc4334b6182. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWU2308702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2584c264b832ba46e294281a74724b18cdeb53e316db7e6a653a9dbdfda09d6. 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/QZNWU2308704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a2bbb2409888cbe2781343188c32c5645f62b12924caa2ce19f7bfb17d4da8. 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/QZNWU2308705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272a5d86428bea9d16290420d9114bdc224c88ead29b366e5b10fc0252bb7ba1. 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/QZNWU2308706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a21276fd03dae1cf29ce7a829f73d47eefafdf2d3d9fe0a421fcb3f8bd9fe9. 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/QZNWU2308707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401f43c35bd1342f34b3dceb45bd97b9bd2d1af62abe0d129dd693934454e7e4. 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/QZNWU2308708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3f448bca9eadd8761b650c7c6546945a91fc2c55718cb11833d2118617eae5. 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/QZTAT2322281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193f3130bf3fd2a22871edda2618d05e015afce97c3ef9ca3e72b75278e9201e. 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/TCAGQ2290908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994a2b92618a71b842f7c67eef05db5c778d75c1e416cb1aa13f4a3922d14a6b. 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/NLRD52354228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944577afc2c893e9fc3a6f9c5a92caa4e0823c02689081dcd21faaa48dfeeb23. 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/QZZ8B2396466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7d3665c09127d77be72681f0e7b862ecd4a2e8ebe41b8a4448ccd2b1780a13. 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/QZTRX2372982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b249ad5f26e97dc28657964729121d9fad796a31b488e0459f6dbe708bd737. 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/TCAGX2385330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fe87ef8422b0e6f410e61d5f23d3a00f58738e119fdc3a3d43b7cec3221251. 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/TCAGR2201256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e8a3d7888cf6ac3ba75de49d1abe976b6aa5fd2f31c8a9ea2d2252d582e521. 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/QZK6M2121655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0ae16be405fdc2a82df63da266864382dc10771d428d08f9e66fefc8f958f0. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZFYW2078174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed21fd1b29623e49778017ac91ff9ef76900f6f42ebca81dc03486d670711fc5. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZFYW2078173.
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 0xb11d5928058fcbeab8c194fbaf5cdd8a4a7cd990d9cb1a583dfb766adf3b44f1. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZFYW2078175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066bc464da06cf225d6810a99f84afdd46296315a1f2a3fa0ebcd6a2fb2a397a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZFYW2078176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23a02fcd588d250cbf99b67a2c2d7ea6e0d2e6057cbeb075c665598604b3769. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTRX2495588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32f30169608d824d9348e9cd67f1cc8645d48f8bc62e9914c6dbdb9d637802e. 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/QZTRX2495597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d438208ebdc8ca0be96098332382c792b6ab307862e6ea37d3d82b2b656602. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTRX2495590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8557f06ac05170f03ea961a3c7aa7ee66e30b80f98cf98ae4bdec19f5c1dcb21. 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/QZMEP2386575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc198dd13a67c86fb36d276c683041faa49632260c8d863fc3b012bec8a60761e. 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/QZMEP2386579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302f1a9d05f674838fa6c627c3b7d017c889342fd37fea0549887e84f816182f. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZMEP2386580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabb4f8f46666d07269d6c3e5b32d73fab18e4049b11f1fb973ec1eb5fd5f86d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZMEP2386578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765078bec94ebcc95d2682859b8e645029ae98948c555c47286c9e85f9ef961f. 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/USLZJ2232936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42b9b97f8e24aba1e45477bac1fd6f2ffb56b58424d6f0eb5e467e2240c78f1. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USLZJ2232945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e6791987b67733a84c4c0eafd5fec46769bc7770fd1ffdf82a4aaea1f61584. 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/QZTB62488916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc9cdece37ff86faa64a1aca23f122e4f39c0071a9b05058b38fd399e3c760f. 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/QZWFK2380409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac4275d22ca80a223c657c1378a72de31302492a405635e2b69bf459893e5c9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA52241735.