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 0xcaba097bc77024ca5086617f04d7535533e16cdce793305ffe01c8bff19fc6d5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/968ec7b7-6872-493e-8534-485170088c83.json and https://artists.proofprofile.net/proofs/artist/968ec7b7-6872-493e-8534-485170088c83.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 0x2d0158cc04509765c5808d3acc6c2cf12f43ff95be3a4993e076479bd556d097. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6P42320941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88804d8e6a5e579ab6c96f975c05abfd78e6bece4e7858e6db849abbb4a746d. 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/GBLFP2187447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e0bffdbbe9f3f8505341204446509f7398890b92bf004b3d85aa452877c536. 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/MXF012301234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d19ce31cfbd5850983467d3c2148c9d9de101f4f14d49f45115655312ef0fa. 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/QM6P42318691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bdfbdbe99dd136bcff53cfd67ab13175022fb9432b4ae3ab7e6c562fdbb05d. 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/QM6P42318699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59d762826f6b31936bfadfb58991dccd01438bf9c8c7bd1658b866403f56472. 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/QM4TX2384361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb864fb96b4bcdab36989693785c52a6aca2fc0b609633e661f87b901d3b2fdef. 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/QM4TW2382167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a23a47cb4267b3eaae530f1775b3633af3fa603368524ff3e91f87a78343d6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMDA62288603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca82b799f6d3bebe8402fec9c306b9f43cc1369fd685c53bfc8aa9fe7ab423a. 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/QM6P42229116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de46e07a780e081a49f22bed7d7742579413d9a3fabbb28e8c1c0df0b41bb0c. 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/QM6N22216274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0158cc04509765c5808d3acc6c2cf12f43ff95be3a4993e076479bd556d097. 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/QM6P42320941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09db817771a69be4a430393535846a0ddfdc307833936ef4852d3733eb249995. 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/QM6P42320953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8e742f1b39a796ba0f7606de8eda6a909b2bc6e55cba92832282b3078e0025. 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/QM6P42320997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f96b1de2a7333f40ac62b3e8f2277f6b3f88fb12d1f2aed34f82eaaba198b51. 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/FR59R2189664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57f06c6a35b009b49169b33f4130ffc56aa8c329f330e37f1fb354321e43a94. 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/MXE672000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24f8270785cb7a9fbebca41a74f03c8b065943d357f773c7ed2c48c837fdea1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MXUM72201542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52f55bb743719de69c7e17f0e061bf066a950729a3d928f12960735126af956. 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/GX53U2004188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0609ec62becd64c1004ef949dcebd870e54f443c4b08f41e277f167e7bb9e59. 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/GX53U2004189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ba255f97646ac424ef140807dece3707fd6cb39b75ebfe37991525916aae3a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:35:44Z), 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/GX53U2004190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc4a008c74f052b4c2309eb1d650d7441f449c9915127971f5269ba470318c5. 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/GX53U2004191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf81a9b7783ce6dc01eb57c54db380b7287a7969cce05bbe01f67e89234256f0. 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/GX53U2004192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824fce45a6b262749c2a46a7ad8a340e0a1e84d56aad184e96487bb945463dfe. 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/QZDA51935326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03648945f4366779b89a5526840fd5e5b59ed59f3e570ef2ca348d47feeed402. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA61879468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c71a276e7b768832a3ada7904f938d655909e5bf36eb1f3c8d83ee30bf20951. 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/US7VG1840452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206a0c4383a3ea18e042b964297f1ed5e54bb0ec8b28d369401f76e978a870ac. 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/QZW9K2200444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b3ef336e2fb370284d2ca67b12f97e075168cc4cc5c5a75db7c89facefa805. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/MXE672000016.