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 0x1fb3e3d12b689a5c17287ae09bff27760d858b4e16f6a0db37084a39291682ad. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3954bab2-21a4-4ed7-b71a-7ab8a65b49af.json and https://artists.proofprofile.net/proofs/artist/3954bab2-21a4-4ed7-b71a-7ab8a65b49af.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 0xb8ab2b72e895cf20683915a65ab6fa58bb1b6dab4d5769ebab2760ebef54b526. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPR2263562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedbd0a3a13ad96b4b7219f7cea444db17c825557522a52c20516bf13741fb93. 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/TCJPR2263565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959c3116245ab4fcdfed593c442f0980cff726088aea892fad9bca1f7f26afdb. 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/TCJPS2294283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1589f75565b1752c3a42d344549f2ca52eabf47bda950027800715f878e7c9c4. 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/TCJPS2294289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e92073b30e1fd850b701e031549f818b086b707f68e9d796f5f0b3b9f166b18. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPU2384594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4da1fea3e1efa0565b12c14a89ef5cbd2393b7a133bff994869c7ee0398ee4a. 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/TCJPW2327178.
Quubi KiTSUNE Party 2023 at GORILLA HALL OSAKA
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0396e74a5dd5786e81df220fc8709889ae4e5783086dcccd4a3447a465a44f33. 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/TCJPZ2491256.
Quubi KiTSUNE Party 2024 at GORILLA HALL OSAKA
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900774310d752018514795597863b6fcbd16a6efa6656696053bb3a8d0a18a1a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:54:02Z), 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/TCJPD2410084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a7b8b3d741388dec6e15d4ef4204093e7df598e69d3ab8d8545fe370155eb7. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/TCJPD2409998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1524412149253a1554f5756a0b3679aa3b883685e73b602378228bfa53a7c608. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCJPD2410008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57e93bb57488d9c83a141de1f65dc075d1071e6effdd3bfe5bd4b20a2b2ee4d. 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/TCJPD2410010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2633ede9fa9f71b74db1693a2703a649d7bb6741702d923e32b440044fc1df7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:59Z), 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/TCJPD2410015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e148bb625f3d908eb63d32287a50dabf13e8e05f62f019bb7d7c99f198359b7. 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/TCJPD2587890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e148bb625f3d908eb63d32287a50dabf13e8e05f62f019bb7d7c99f198359b7. 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/TCJPD2587890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d9045b9796e05d7fd91d03abafd3051e404df4597651d604ff2f86b53f8982. 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/TCJPG2598682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011cafbf2dbf5ab5ef4b7f098beac51a0c47e8e1335acef6c033133f4009da35. 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/TCJPG2598661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d9045b9796e05d7fd91d03abafd3051e404df4597651d604ff2f86b53f8982. 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/TCJPG2598682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf483c991b36eec022b870d252b53533a906a15d7aa7025e0338b1aaad211922c. 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/QT66J2576657.