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 0xe3ed2d2ab8f7d7c73b8f21260a5b38c28b863a610c3abade83941b61b41ac147. 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/8f919c31-b4b5-4605-a0b0-391d115abb2a.json and https://artists.proofprofile.net/proofs/artist/8f919c31-b4b5-4605-a0b0-391d115abb2a.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 0x943ca6b41c2f25fd691f0566eaa58e2a8065a0b3eceda9d7c78fc29bb8a841cb. 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/FR10S1994567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc460422eefa67cc8730c361ada006f68b69565cd34248d1d535d54508320b173. 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/GX5MX2145524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28517440d44819d53ae518e8bae8bdb6bbffc27164b584f6d111d9805cc2ba2b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ROROT2304570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c0cba5e7aceaa0573ecc4be01027ab04d9925cd04c91bb778a6fd007a16455. 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/ROROT2300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1150631817904c9ed12bb31baf8d4f0e1b40478c5371444085d01f04bca68998. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCAHZ2463728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e9672cdc0d93a52ede88b61f31206cf188bdc80eca1f2b833eea0c198ac7e5. 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/TCAHZ2464028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e22561fe1162c538b74984ff796f9c6bea93e0e414dd7e9f89fc1de613037f7. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCAHZ2464056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1150631817904c9ed12bb31baf8d4f0e1b40478c5371444085d01f04bca68998. 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/TCAHZ2463728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf729c62cb26a9d72f563f3faf37739f7c7b10084991e4553f9a6781970765204. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAHZ2463829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e9672cdc0d93a52ede88b61f31206cf188bdc80eca1f2b833eea0c198ac7e5. 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/TCAHZ2464028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e22561fe1162c538b74984ff796f9c6bea93e0e414dd7e9f89fc1de613037f7. 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/TCAHZ2464056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a05f0acbbfbf928000850f722d05528d98ecea7c4740d9999ba78b2bf448db. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAHZ2496249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dd88abcb0e928ada9f35d0fc9f5c9e4b2dcffbcb7252ee49f28a25d37fdf44. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHZ2496112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d907a046e70385ba40e920c414a386cb16193530891ccfa56436ebcdfeb762e. 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/TCAHZ2496168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0598d3c06f40fbe7163bba4b573e9f7b2daaa07e33888a6a720c16c4230259a. 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/TCAHZ2496175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98972936efcde1281ff6f5cd5aeb251d878308e9c1ed412fa1358288c2d53472. 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/TCAHZ2496239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ca0f104dca070568b965da31444c65de2f1948ffe089dc559a4f00208a2c36. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/TCAHZ2496277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2831c84101fb989785fb3d055b3ccf2a9fc7d903a56e58064aeb2a02db318855. 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/TCAHZ2496343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29261020b42dbe8d2527aab13f3846676cde3d51567c378681cab9781008bed5. 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/TCAHZ2496510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5864e8ca7714ea993287777b20ffe24317ee4dd1a4ab14c214997c3262ab036d. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/ROROT2401743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05e70eec1390e8bee520e44d0f0089ee8fe0cfe29af0cae65e9f3a52d3719be. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJB2486264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0da479247e5c211f54a91fd934b43df2c0d25eaf4fd43f695420305d2e7ca5. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCAJI2589808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7dbdc3ae1e7f5baaf10f341f45e2c5017cad301595416e5d22f2415dafc171. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCAJK2529372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492b0344c34371008e7de81327cb0de71eba0c8cb8dd5a003470b41033a9f77b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJO2595354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492b0344c34371008e7de81327cb0de71eba0c8cb8dd5a003470b41033a9f77b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAJO2595354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24948f1311ecbeb0fbf05bf8e77f1c92446fb73cacab2bac6ac05eac4c489ecf. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ROBRA2505000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47cfaa57fa9994b9fbdc1720d20a8c2c142492ae0f863c9faa4c22bc5410dd8. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/ROBRA2505508.