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 0x226c3336168095c2198b99fa0bbc799db6640ded5765f24267d9563c11fe1353. 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/d5ca4bdd-5c02-465d-b3aa-74121645aaff.json and https://artists.proofprofile.net/proofs/artist/d5ca4bdd-5c02-465d-b3aa-74121645aaff.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 0x890cbf54b7a3f7831357cb5b7ee75e39bbb68ca59b88bd2b9a22c0757152751d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:26:49Z), 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/US7VG2448400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7688d8ce209f218531d94b010ffe2f080d01e19b9056b8d35846803c6b41fc. 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/US7VG2448406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24e5690e0291d3a594c61a4984556a7694f3ae54a762a3d814c8d0c9cec6b13. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZ5AB2453955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b347ae60accc1c8bc17e7de4b5aa96da8b54061ee56db556331511f6ce1cf4. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZ5AB2453960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85df76e0bb1faf0b9164a5eefddb7311e2330ca0c51ec67f4ee41866d507c041. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNJX2453480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa048b2f6f95789d09bf1a722dedde9b8eb25fae2e0e3db6f3f6de13e523fe950. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZNJX2453481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862debd0fa38c6320a36647e5660d01fd44bd7feedfd2c94203bf1c755480465. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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/QZNJX2453482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79827ff6e0cff2b342b93b875a655ede8f96f875e494a33523240c3068a227f6. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZNJX2453484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f4277bf3590134fc9b83b5da2d4fc24723fd85a0403c35bf1a666dce99b2ff. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:28:40Z), 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/QZZ8A2483314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6663fdfa04d10f9213a791a274b0d81b9a9dd7a81fd8f683e6fa5fb6e3e270. 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/QZZEB2420085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1a26cc3ef1eeb0b96ac0a63c68db05c5d7e107d2168eab250f565f18d9fbb7. 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/USLZJ2501598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b097b9486b920d787391c48c7ae4e110558fbdf71ffbee70e55a3f8b981ed78. 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/QZTV32505237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cc904de8b984f757dbbfa1f0ea65a50cd89911dac3c3c7a904fc3f94ab91cb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTV32519024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac010070d56ead9e0cabf759c58dad0614af265f25008653cdda2dc6542baf42. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZWV32507453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3e1d40b072a1c3442cfdbb3f6a19f2135bec2a4a94b6351b0dbcd37bc4788a. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZWV32589100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78477fc8e45b7d9a7d791b1df08336162272a2e99333165cc4961858b4a039dd. 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/QZWV32589106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f11e66fc1a4efed94585975d6beb7854a3d47da3341de78890b817e9c2ecba. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWV32589115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37826b3a7b118675dfdd36e62a59ee931386f121987790dd89974141df6b0f0. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZWV32589117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519b27852f129fd4cb2c6024e41d99f1b74df709cbe49d2a0019bdea23b39d5f. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:09:15Z), 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/QZWV32589120.