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 0x76300ba5e29cfd7644c89796fa7c0e322559cbf07abe0b9d761773b104174281. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc53b839-3424-460a-a510-c753e300dbf6.json and https://artists.proofprofile.net/proofs/artist/bc53b839-3424-460a-a510-c753e300dbf6.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 0x59ddfc0aff0156a448f993effebb63468577ed3d2c1be38a3baaabfef7d5a44b. 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/NLG662000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbed3b59a2d284a5f06c9dfd6bbd54f4e665f09f68e542f8909c535dcf089f9. 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/NLG662000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949d0ed2bdb9cec11ad2cf885a452b2f6b3dac0740a7201ee0ca5c868ad2180d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NLG662000418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9daeb1fcc7b2cd9e20e8b5bfadadbcb1a1b99d6cdf7f5acbcd67cb0bf6cd619. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NL0472000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3060ba79ac179fb6901f9bf1be9a9a7d90d76fb5d3c9f198b8ec4a64ac2b5e. 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/NLG662100192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37a12603fad39c2624ee26fdfd0ecec6ba2906ac97d3917f92ec84c27e7e5d4. 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/NLG662100181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96506f893cc042060fce8cfed0fb275fd37ee965f6221d34bf9f7f14e11fd6f9. 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/NLG662100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ddf561beb91a3634895a5e38fb18ada66a6d15eba74472a45f13a1c2380b73. 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/NLG662100488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ab14830ce1189b257e458684f67ef4c10cf05b76d06b43a3d2458353c2fb21. 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/NLG662100115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37a12603fad39c2624ee26fdfd0ecec6ba2906ac97d3917f92ec84c27e7e5d4. 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/NLG662100181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d98c08c5da1eebfee2c8cc58acc92628a784fa94f296b8ebcafd45eea57bf74. 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/NLG662100590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3060ba79ac179fb6901f9bf1be9a9a7d90d76fb5d3c9f198b8ec4a64ac2b5e. 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/NLG662100192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b632735d4449fe408740cf9a93699a441872d35e6c70ff75e2fb3a363a37fa. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLG662200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578519c178fbfc472486552152b50df03925b53aa6329a88ea99ca700937974b. 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/NLG662200389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602ae13f757eb9d0dfc4ebbcd4b427435759bc13d4aec731c3e855ccccd4a6bb. 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/NLG662200440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa580f8b26a4c8bf59298db293081f6650aa9130bed9b8f76f71fc5d6a41275e4. 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/NLG662200441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b632735d4449fe408740cf9a93699a441872d35e6c70ff75e2fb3a363a37fa. 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/NLG662200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578519c178fbfc472486552152b50df03925b53aa6329a88ea99ca700937974b. 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/NLG662200389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5728f0f50f314ccf4eec3806628cb46ebe736653262c7dc33cad46ceb88de87. 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/NLG662200442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55964132b5ecf3d2c42e85543f265fe53bc724d693ec3826d05a86fe577fd40. 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/NLG662200443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe734943655ac14fc078672629075ef46796449566ce4493e482e2828738e52. 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/NLG662200444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487fdc13b2a04fd0184e2e931e48c5dc212b31d7348bf439344a45fcd6573865. 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/NLG662200445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60c45253dd24d52944a7b465c09ed0e49ed901917ffde1c240cdcf32b4ddd9f. 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/NLG662200446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68897566adfccbcff859409336008b67723765e095ccbc24788f00df4ab06fa. 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/NLG662200450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d10db27bc4d5f8ed46c1c1a475316818099e72ae7c4816120da2809348dd0c. 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/NLG662200447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5c0d935b737ef6ae24396c43c019782e23102a60c65fb9b8795b64e73a293c. 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/NLG662200448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d8febff5a568149c935d3aca0b15d1511de39dff81a347b77206722a51c431. 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/NLG662200449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba833570355cd94f6524d27ef94fcb7efa9b8aaf7f6893316bfe0d15e362deb. 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/NL0472400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bdd6dde4520e872eccdfa4c0bf9ec60f4da4c0f6ab7d6f9073cea8f3693a5d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/NLSU32500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4262ac6b0110e6cae973855cea13550c97b1540a36e3eaf26660a1445c783a. 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/NLSU32500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37a12603fad39c2624ee26fdfd0ecec6ba2906ac97d3917f92ec84c27e7e5d4. 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/NLG662100181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb489a5a6762eaff4c071c35dc99b3e1c5debeedbd73efc98791dee381e7422a0. 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/NL5MB2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6cf1a8d21227fbb9c7eec6a9b3ef524fcd9654c8e209876393f03f8b2fb163. 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/NLUM71600634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9597025c4547551c2d4cf63e08341aaded0bce34eb866708fccc28195c7df2ff. 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/NLG662400138.