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 0xca5d9c4efce48e494a49aacc6a4a942c016827c9836c6cc739e7f1c069586caf. 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/57062886-0ff2-4ae7-a737-8190cf951233.json and https://artists.proofprofile.net/proofs/artist/57062886-0ff2-4ae7-a737-8190cf951233.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 0xa9537f9e780842eb120a7bbb9dd492ff48a8b8730ba746f489a3b0e8554b81a4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/GBKQU2040402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524f5aa9d927acb8d6e9f7701dc5fc7bbfb7f5cf021e6f4080cffd067a510a09. 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/GBKQU2085066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759d6905bb760f651b28cec599a38f43c40f03ed68e5560df40c34ef9911cfd8. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBKQU2165442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb553e01c7d118e986a841335f582fa01f6209bdcf602c81a632481ebd3773e5. 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/GBKQU2188772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe268fa9fd134ddca0bf246a8cbf5ed90b65a00354ace29a2c6767956b71717f8. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBLV62122932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78980198c94fd62bdde62486963419706fd9c67a970aae77a17814dc82f242d8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBKQU2218567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd12dbe1d466aafaa9a0d85c9af4924ff524a9295af4b99f84074daa9651cbc. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBKQU2230615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6264b2ff353133187766c139da8610c0d1fecb241f713431da1efb62c4aed9c. 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/GBKQU2317448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5ddb476d71386ee20ba36d2b8b158cdc200c2cb4e97b9c9286e644dfce5f3f. 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/GBLV62308010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbafe167d04e16a65532ed4d7425867f0ddf3e3277fb289d42b79e45b0331d0. 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/GBLV62308476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cba8f5e23fe0042b7387ee613ca75a33ae9cef62b533cb2a830fe6e29b701e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBLV62308490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c8ef3ffd3a59afd571931645d97e6543b918b8024b7be5c1bea4c06d462714. 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/GBLV62322578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729ac3b5db37782daa04e66e4f88d52c7b0fe7e30716211aa6c68ffeb9fc000c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBKQU2421085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2406508b61c5612c3e6e372e43e685c039a1d9fdec68c92c9183838383f0421a. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/GBKQU2421086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c7b6582b136c6d5b4a2e7dcc7c9ecbd6477a0e6c675c8397b9d3bd657ae293. 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/GBKQU2485628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af948d50a1c7a5f1c2d9699fa6b8bd0f268530cdf9fb11358b258f8b4b7a0f8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBKQU2385702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74ef0bdb745fb32fcae8e9befad8e131aecaaa2b443542d2278c8c887ca6851. 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/GBLV62400429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028cdfb5a8c5120c262cf5a9a10d9bc8adba7001c80b7a930715592c83c7f32e. 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/GBLV62416524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502ec5cef80481d5e36860aac9408e33d2ca4cbcb6be4a110aeda18cbcb76fa8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBLV62419064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda5f2aee31710a7f8d96836545928bcd7f107b260874945725ec9a26b9b33c0. 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/GBKQU2501887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cf8442901fa3cf66933b03d84bbbdfaac36035e4d7225e571ee8b0606d62a0. 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/GBKQU2504887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502ec5cef80481d5e36860aac9408e33d2ca4cbcb6be4a110aeda18cbcb76fa8. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/GBLV62419064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cf8442901fa3cf66933b03d84bbbdfaac36035e4d7225e571ee8b0606d62a0. 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/GBKQU2504887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fda4443db4b60fb418c504749fb30f6eb9f63aa4f183c78e449b28e65f7ac5d. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/GBKQU2514563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5b684ab4c6872b402e622fb58f623dbf07d221da11fbbb4e0a2003f32dd662. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBRKQ2560750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b317bbe82624b93e95e2218b6f9f6fe74e86d0eade073bed107f7885416fd2. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GBKQU2534950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa742670669b90ee1db080166fc07fe0dd0bf5c01865f74f9486b2458f344dedd. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBKQU2540544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19bea908e0f9a51af3d98ea4ffb84776b21cb403a8e1832e6ab7f9819d6bde4. 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/GBKQU2541319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1b6cbde9d81cfa57d2f112d934b8c87d43282755e303e7c67f95986a12784b. 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/GBKQU2575376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e71ac3eb23a8162850e9eee6130d9358d39f2e3d9e3c565d4e6275e82edd7b. 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/GBKQU2580595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4537961ee6a6fcded8318b135e0abf122efbb4ba1c751037fb39de34e7a65b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBKQU2579368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9cc95cc2c7f5a0394b995ac8c05d53223a251011b31dcfeb193f5f6934e067. 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/GBKQU2587051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9588b23927dbf8cfee896c9b7f18e762d87c449df8d98898cba0876823eeca50. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBKQU2274605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcece23c0d65af1c50fde593cdb32edce3d5589781dedafe97bd06cedaee96c9b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBDLM1900095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d86b7a61bdf138bf81b83cc1edab2f6b5361dc39ddb6e1db7e48621b20fbaa0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKQU2357796.