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 0x233aaef37b922a330c07d48e6ea08d37e5eea77327f312581aceb962417258fc. 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/b8309c14-e9ef-40a0-888e-076e8768af78.json and https://artists.proofprofile.net/proofs/artist/b8309c14-e9ef-40a0-888e-076e8768af78.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 0x34230d892fc66b5e107130d353ea03bab52d10f584b515cb5e61a7ca6acc3551. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QMFME2440695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851cb66b69d502d446b0efffdefd46f3b89751b0b0bd0d2ba4187831737db580. 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/SGB502540961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5fbc83380ccf9a00fbe4a89e49f7bee071561742d316b98e62786e169168bb. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:39Z), 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/SGB502517274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39bc5f5fb36438f1f4d91960b10739dab8fac418ce26bb2d59111f2cbaf142e. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:57:00Z), 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/SGB502586566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1ff20cd6bd78a0bc5949f0295940702e9859b5c3f28ef09e50c5390b8e71a6. 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/QM3DF2421871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079fb38c77f961aeae0e529403f65237f24f499a11355a06d2cedb3f4f58d013. 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/QM3DF2421857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53257070ca889cc306b773d79f0bfa5925689c6326adecdfa347ff129891573d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM3DF2421864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf876b2221932509283d6042e71eb0b07baa6291b4430c26a7719a7d605d6f7fc. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/GBKQU2505308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af6683a596e4a6cddf713322f819dda895df84d226248ca61f9352a21dfe11b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:02:07Z), 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/GBKQU2505309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17554bfbcebb237984d6f83fe8231c3c539dd8a5616c5bc85c543a2620f8dc31. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GXD7V2587941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4800f97eed01c7cfde81eb3cd5237b791fcd29afe9af331e6a44270a8b3a47. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GXD7V2524010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17554bfbcebb237984d6f83fe8231c3c539dd8a5616c5bc85c543a2620f8dc31. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/GXD7V2587941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f872c572033f4dc064bec750c1fb2b29f325c5ef1b0f58c2c6e06662efccf26. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QM6P42520028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d4adb357bde38a91656ccee8329dd7cf91f25e9646f64f71a6188250311ac6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:01:34Z), 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/SGW502503717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4aefeb1d09e7e7b9e55f1c0739e950c7ab6f38bae16c2cd06ad928dc6c57f9. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QM6P42582055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbb074c5594c60ccca2b1e34558ead4de5ef47e0614b1372210332f5df754b5. 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/QM6P42582056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00efd58443569dddd61332ff442c12fc85fb6bb768f3e5d7d1f313166c0750cc. 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/QMBZ92541764.