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 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 0xc4becbcd5d06b46e80e05abc81b4f416490964c8dee399c05f69631dee36b076. 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/efeae93c-2334-4164-b042-b1c395da515f.json and https://artists.proofprofile.net/proofs/artist/efeae93c-2334-4164-b042-b1c395da515f.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 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 0x5c2f5cc5fda097c007cd520d6365fa784e6ebcb7fe9c690564b14bba5cf23009. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:01Z), 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/TCADI1796565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38c520cbbed825104520a77fcacda4d6a8a0ea35b6acde43ea7beae2821953d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCADN1891304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111122aa33194a5de3e9afc4b5a67a345081d5a61380efbaa42851b1705a8380. 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/TCAEQ2043633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb2d54481829df3433c2cc584c92dcdb1f0f006852488fdae58785bf009e22d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAEQ2043657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe975eb6e0e67b8a665d9a7b12516fdbf48c3a93c2576d07fdbde6cde950fa303. 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/TCAEQ2043670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdc35b5c9a9c695bef01d8e8294d373cac80dd01a2aa4f7ce47862bda1772c6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAEQ2043672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf070d09988f7a05fb700b6b26bcfbd901165d9b7fdd87849b644410b7a9956. 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/TCAEQ2043703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2be684c13fa4cd824ea7f0e546130b4c142e79f1a1322226429c28948b9d67. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAEQ2043708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e21703f6904d3e893cd60de4d819f0a95bb2ea881997d21de1e0246ce42ddf7. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:06Z), 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/TCAFX2170459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbffbb4c529928a1813dfdbcdcf25a8c3e15227920d15030ae85cf2dbe63954c. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/TCAHG2325095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c10b27804e9f3be655c69ff088281c209009f3d0bf9966696865c1c90b526c. 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/TCAHG2325122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fcf9bf96f81f5a6b0d237a1658278c919f4af526a7f066ddf256037304de18. 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/TCAHG2325754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980bea84e784dd4b2f760fa70b082c5e884819d1548d109446b91f6558ab0c9f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:44:32Z), 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/TCAHG2325789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818bd71708c1480c3dec7e5375db61caedb4a386d62c7ecd4e59ed2898d0063d. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAHG2325793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7205fd90b324d0c041e7a5d49c5dc6b0f2b20a148b2a1061d4c5d1c2d8ccc88a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHG2325918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b926f34d9f84d5d9361ebb3cb536ebf776649a3bb12f8c30f35959a6452da65. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:31:15Z), 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/TCAHG2328416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9632fa9ccd617b9591d5fddcebbdf437368d8ec53317097121ba3a62ebaf9aa. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAHG2328422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11555fe27d4affa4b78558646f68a9c416c071c8c601f5fbd00c5c127015ecd7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAHG2328820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd63a428a2b19cb8635baad90a4adbee6a3a346d41b7636757f83e395492ac2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:29:53Z), 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/TCAHG2328837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8592a3322dc4edb845684b2fefa3e96f0aa5e2b3bf557f750fb94627cf0492. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:37:45Z), 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/TCAHG2328840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b6c912abff709655566520dbf0603820cbb82824e7fee602105b088b1ef673. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCAHG2328850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659a234000cf9104bf8fcb67b608d099a91e78b6f61413aad067a2af22df8289. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAHX2483130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96957b43677227d9611e047cc009747395923821d7a32f0e5b2c132454b348d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHX2483144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc768aac2c6e600c8222ea58e2824a4b5a9b806d9205189b874be6df788104581. 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/TCAIA2450481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af55a9376fe1621751910c237e47186f0589be70440f9ab0d2efa7b0abd8710. 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/TCAJL2530777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92630c96541b983528a0c26102d11a4de663d8232fdc6cee02dd03400b7fac7. 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/TCAJM2530811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51855d83d588f0fccb52628478ee61ef42da5bdbee4d9dc9b2d0323c5a27d43f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJM2530825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342d3dfd840386c6ee50f5ecdf5c9c7f8ba7afa6feb61a1469bc1e0eac55f973. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJL2530849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75b7c35d920e5e6add8e30907d929180de881a108156ee5182ffacfb598a3c3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:14Z), 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/TCAJL2530881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f4314fe1d3b97c1e9d200f81a87ab6f32efdeb3ca28ff0b4044238ee7782fb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:08:52Z), 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/TCAJL2530896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cb2acc8a0647e618613184febf313006c72f8354946b17045b225095182a4c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:04Z), 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/TCAJL2530926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad3d79463e6bdcc8c951b04386a3b960ed339c8b3effdd3de7eecc4473e3e6c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAJL2530935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28986edc4f496f901c32befa6668a66b88d3678fc0ffaddb93092743565dab9e. 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/TCAJL2530948.