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 0xf6090ced07002bdbe344f7a3e49ed4708e204b4a47c041f3457223dd86bc0bab. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26a54a42-361e-4fd5-a10e-6eacced257bb.json and https://artists.proofprofile.net/proofs/artist/26a54a42-361e-4fd5-a10e-6eacced257bb.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 0xb132479d79c7ace9b76aad20a3725beb81f51f6a3c5d822aa8dbbc56fe038ded. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/FR2X42110702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848277611ab3ded80edf00270663545e3a3547c078175cbfeee517eee71dd7ef. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMBZ92520440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba0c069c866afdb7523e7987d85bf51c0e78b74adf4a3991ba1efffe1198f95. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:23Z), 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/TCAHZ2478298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624ce921b0acc192bbe4eafe820251fd1850021378634e7ccd05f8db89ba244b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAIA2445056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624ce921b0acc192bbe4eafe820251fd1850021378634e7ccd05f8db89ba244b. 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/TCAIA2445056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2027473b2aee9ab2b96ace63f7e9a163e48991babfcef5aa6ffdadd7da10d34. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:16:01Z), 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/TCAIA2475876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3cc79a4615d82cbcc6409ec04271c37d266c731b2f14725f037ce6ecc276e8. 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/TCAID2495256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ff0ce9dc4b60f0418ce5df42f0934918e5bbc9285f78f3bf6466ff5a882656. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZES52335113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbf620bcb21d1fd4e40e06f2c277c4fcaefea11ad0bd03dda5b37df31a57210. 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/TCAIG2473223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbf620bcb21d1fd4e40e06f2c277c4fcaefea11ad0bd03dda5b37df31a57210. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIG2473223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb147fbc4efd9589949faf5b63bf227aa9e06a0c4203e92588cb56461762b61e. 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/TCAIJ2407892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60cc307b1a964a723a8365fca724b20bfed3844ff2a9cbf8a992b01f04a120e. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TCAIK2478548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b19e6bc3549ec37e68754bb636b65f69aa00c10698ccb70638be86e88b5f0d3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:56:50Z), 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/TCAIO2482454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b19e6bc3549ec37e68754bb636b65f69aa00c10698ccb70638be86e88b5f0d3. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAIO2482454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a4dddc7dfb7e4a8ddfaa05780e4920d512130becfa22b8e2ff1a248838726b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAIX2498302.