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 0x7317ffdb9e2ee2b510918466a570d6ad2831a83fbc35e4a447d798b020fc67c2. 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/e0e73fcd-a654-4a7c-9be0-a3251cb8dbd1.json and https://artists.proofprofile.net/proofs/artist/e0e73fcd-a654-4a7c-9be0-a3251cb8dbd1.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 0x8f7dc261a180851d61d18d967153dab7d98f071914446bea25b3a1399f5f8701. 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/QZ85M1922960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b41998c428857d9e6266c83c2e385cd6655389506cdaa0445ad4f1f94ce338d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZ85M1953079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fe9b88e6674337e3b4bcaa53a2d9ac12d53d16b2553577052aa3f9b2e35b6e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:38:44Z), 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/QZJG51976465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9ed8f84eaa5a03d8582f9e1ef8f4353bffd65f61c769346e0254b49a78d768. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZJG52015725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aad3769bda5249f498ef0cd16661eea528adcf705ab71637c641ff0d531d11. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:32:27Z), 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/QZJG52015727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25b75003b756b3308e5e8cb35812c8853d1470f33f35652b7091eb2b28dd416. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZL382008391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf967e13efd8a3268c58ce79b461066cf3e2dfff72142f5497e2c05d9a3cbb04e. 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/QZL292000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16c1683de39a0c8f6cb86bc0225fa6f5a974ce71d30478f353ebee7d5a1ade6. 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/QZL292000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63e86ae09199bd4c4e61b78c2ea30e7a5e72b071fe6c9fc2a357a7fe64d86b3. 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/QZMEP2069780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffb68818630d6fa7caf0182385def40d0e603114cada5194d7d8173314fd820. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEP2069781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa628ef47a997842b4f4d7fb0ac1c1a39c34900e3e2d0c2a4deaa68baf4d823d6. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:20:27Z), 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/QZMEP2069783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2de4145d9c898573fa29e6581e385fc7dbbcf3c28d4cbcf8eff7495bddeb719. 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/QZFYW2146957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861de0c47a0df2f453a4105cea085a2da5c49e588d5a8e15cc1a8c4b7cc0b3ed. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZFYW2146958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529a9778dc40d26d55f19391eb5c47c1c4538d35e73b5c1d3d4ecf02218bc225. 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/QZK6H2102032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa96febe496676593e64df8a5436bd446d2860afe91e09ddc7e31d9f8d28124. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:29:01Z), 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/QZNWR2138807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7423bdb1b30bc80d0b6652343b2c9f10fb89c356491acb9972ea5ce579c23dc3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:56Z), 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/QZNWR2138808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855b4f3d4479e97d9da280b2a11bda6fb7fb1659a32411235f2f6da5fe8dbd8a. 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/QZNWR2138811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6833b02feb8e36427efa5c706dc448c3d39c1d2ea5e0ee54970f20c33b853ab. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6L2374444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6833b02feb8e36427efa5c706dc448c3d39c1d2ea5e0ee54970f20c33b853ab. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:05:47Z), 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/QZK6L2374444.
Smells Like Teen Spirit (Cinematic Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a89d5681809d22b58acc982bc7f4a2e8dfb55f0e759bd4c6e6568d20c8ca97. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6H2325711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cc7831b13ca4a1aa13455e3cef36c06906826d4ee97e5b72e6e753c33b6d79. 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/QZK6H2325714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299a9b6b957fb3b5d94d878ce4c12af52d8717d0886c87e76ab4672c51a81ca4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNWV2348273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b47bd6be3541556a17c1edae7e5b398e77ff53c6f4b58b84f905b27de793945. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZNWV2348274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4d553c88537f9c3eaf666883abcb6f81192daf32a97d9ab5fc77f12c9c9edd. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:54:32Z), 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/QZHN82467567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bcd225ea13ebe1c1511bdc06e2902c12b03f424db887734ab1800dd795466b. 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/QZK6Q2437064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb4ca8f97a62b38e8bc8cf1ddf0af8f1576e8d90af84e354f898511312c8b74. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZNWV2457700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa370aa51d6d99e0b992d3697633b744d2b886804328f07d4adecf8ff44cde56b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWV2457701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2fd9f96ff386c64156d00810b86d4c8d44974b892c9ebb6c6b183e00334ff8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:45Z), 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/QZWFG2460734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8d83603090dc335299a01eebd2881f85f1bc3e858d9951851b425238a23993. 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/QZPLS2535275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1079caa5e29bf99ccfc7d15d5b149f570181328126634b396713cb8cd05cd97. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:20:23Z), 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/QZZ8A2552813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ec648564cc3eb0acbc0910adeff19df441a5037ac6e32c6b2f26fc47091cb6. 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/QZZ8A2529271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70566bdbc2bd9324b84b8f301e22d9386874427465a8d6be71e243fb94753131. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ8A2529293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ca2491a43522560d5fcc9ad6d465743baf7d235dc35b8f8f24d3c499015746. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT6E72527030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991a0c85b8c469f23b811730ecdf3ed94bb39146fcd0a22281d709323a85cf55. 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/QZDA61952421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991a0c85b8c469f23b811730ecdf3ed94bb39146fcd0a22281d709323a85cf55. 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/QZDA61952421.