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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1693f9095abd8cfa51d37fc2b982b47ea2c80f2349e5287366a3ab7644513c99. 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/2e878c09-5215-40a6-a464-d83eb17f42bf.json and https://artists.proofprofile.net/proofs/artist/2e878c09-5215-40a6-a464-d83eb17f42bf.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb56df1b64334279a62e10f64b29a5b59516069956e9275efe078ca0cbb65e12. 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/QZTBF2389588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2c7ca42fe4882c85e3d07d3b431ef722826cba53556a4f0ce53ba1ba3ac30f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTBF2389589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d34a93047a10fe4fa60a8b3b05f8c7cfd7573a10d41a302a3f91086cbef1ed3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTBF2389590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6cba6a245205cb01f748b6910c7170d76895c0d0efdbb556ab066a34a7aaff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTBF2389591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d09a14660978321a6e84d4ba02fd6c82c48958e62933b5215dd3732b42abb4. 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/QZTBF2389592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47622e3bf7483057b6b2a000f1d39f9320cd4fa221e6bdcaaa9dcea6e95fb8cb. 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/ROGRS2400849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb670ec3e09adae09519ae5569bb2aaae6df7344d3ab6f4b3f4f4f4098990a3. 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/ROGRS2400850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225c314075bf066f6e81334dac2e31c3da5252e84cd449448192427b3bbbeea6. 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/ROGRS2400851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9052efaaed2cadf399fb4c960d366d528edd9e9889911b2723cf29ed7dbce175. 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/ROGRS2400852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b50be5de1e0b9fe8fd5976ea8c59a31f0648ece467ec8b05ff8a77ff1e568e. 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/ROGRS2400853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09968ab88efe10a24901afa7db959107ae87bd51322a1ea31d0f395688482615. 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/ROGRS2400861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31898f959518c208888ad96fa2f47d5ab12c302c3282c4e20fd847e21bdde986. 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/ROGRS2400854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8a616138f3904356b6519657773a9bfd58dd610c8fa0e4ea4e923ca06e3914. 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/ROGRS2400855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86355165eb0a116372a0d1d05841e318018c266da7d9c50e1daac4cebe3f22c9. 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/ROGRS2400856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d6b214c9229399a77158319fb28a8333ec54fedb857b6d263a37bb05dec896. 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/ROGRS2400857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aa45a139797565686237e37e1e94c0b0da5dd229c4f18792d0f2aa32b1a69c. 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/ROGRS2400858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f73f5ad4af1ee095bafd4b5a7191d9d004addda2bc49bf80cda32e048363b2d. 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/ROGRS2400859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e60db0d733e47fe2205299c791a5d27739a2a77e3bbd965baa14aaeef21a12. 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/ROGRS2400860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d2a1762668e57eb873af14bcdaeb3584a5c7de0adab962269e1650206ef52f. 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/QZTAX2312907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ceffa9c23d7390c14e53fb5c70b4e2a92a6e1cb28bc1e634fbce714c895515. 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/TCAEL1924660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb87aa378c170b4cf351cbe0ba50a90c44c75eb9e3efacac8637153f24596af5. 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/TCAEL1924692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ee094bee434c537e8a887186add4a2d8a750e5b99be6d13d514a1df664ba5f. 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/DGA0H2423184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0377cec7ff1df71836cfa695b8375fa888a97449a90b54dedbd71494dccc5006. 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/ROUM72300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a60feea5c6fdf02b04f0ead1fdb2549f291e6d174b1dc09203c87999d65d3d1. 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/TCAFO2107504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3252f273a9a8f0f700747925d9b1afb88a6d93a4f2699b19a5c32f892ad1235b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFO2107519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3352d77640f6e7848a0e9f9dadc63cf3e707486ec4fd9e26208ddfcd5d3d8f15. 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/FRX282007217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8feb785ecab4e71934ee9ef35c487323d71b2072482eefdadf85f2db26c263e. 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/FR59R1908202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aef654931f663fb9698a46c204e928f73784933abe961f868d6b14c2436fe26. 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/QZTAZ2201337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf6ae86c8f8229e25bd7958a8e7eac4da87c2a1cdf005cd9423d329b7653a56. 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/QZTAZ2201341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a1353b34d636d860e2413b157044ade30fdaecac8b4e95ace537f07c37efe0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGH2285862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbeb64d0f6b9ea3c20ed78d7294ab76b041efdddafbf25a9ced54ff2cdb0f595. 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/ROGRS2300089.