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 0x01da40e0283fa23c99884a7666a699fd1b1e34a9880ef134f2a526d9a93a6ebc. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb224ad4-34b3-4ab6-8276-df9367bb584a.json and https://artists.proofprofile.net/proofs/artist/cb224ad4-34b3-4ab6-8276-df9367bb584a.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 0x10f659af9fe94668fade5269677e5a520270658af90cf85478f1a5a8c4f63c42. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USDNB9654092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd2ec32285c554b6380ef2cc556f48926c5622aea4eaaac2c549b2d695fb99. 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/USASN0800594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ba35e870d40ea05359a886a63256a7420b738c6cddf3e017f9efd8c001b5f9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USASN0800595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5369c3c73fe65ded371655ec94648e3e84cd88b8526e745a4af819f3005e8d39. 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/USASN0800596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931ac9e0ddb313aadfc675c8742336fee3373f0b9fbb74be106b53a80aea5806. 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/USASN0800597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e10cdd1962392106528e33ac43a531af724de02ad5c5aa50b5d784a36ad051. 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/USASN0800599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc11e1865c4b12ff5dfd25f7bf6d289c21f18f37005e6fce21ef5cfa260d2b9. 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/USASN0800600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d71feb1b1029c0c19b179c4dbcd23d510087db52010c1d4eca0b4bc4327cd10. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USASN0800589.
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 0x59203720be402012b61c11dd9aa50d627c6c32c6f321e2388887b66208b474aa. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USASN0800590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bc215a36b8796b2f1461a7fee352a7a0c0e5e39bd477988a1f7607245979e2. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USASN0800591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb39534f97095bd8d822948a6b1c99e2b0a765c08860e5fb262a2d5d7bd2c17. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USASN0800592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4945c2aa3f30dc5064d6235417f7bc17e84432e493b92d7acd39949ad8844a1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USASN0800593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1df213318bc7e95e7438e92a7c7cad86e2385871e461815dbd059d09e60dde8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USASN0800598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf5f0411b6037837c7e4aac8e9d1f21333f76505ee54a57f3bf30882e4530e6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USASN0800603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb65585fadb5f0ee271a5cd2b527d4337001269be0a19478eda1d4cb6fd67a9. 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/USASN2000235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f5c792d1bd085090da37ca1a595fd9448826113a2dbe92a555529f74688bd4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USASN0800502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabc67f4f948079eff47e0defdb6678607cbdca6ba878cba9524bd7599210150. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USASN0800505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1be2218009b56fb355554775daecfd13a29c3d36005431a1a869bd03a81d625. 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/USASN0800507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f5094292b919f2be75ed38e385175517c08bdeaeb27463db76b4999c7046c8. 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/USCRH0710063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7020e3829e71ee40d240b6582f4b7daafeb9f4dfa701d52171d578a148837732. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USASN0800288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d5b291b5008602d9a1e5f2211e3f6e6dda226d362bd265c93cbf248e46be0d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USASN0800285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71979546752d006664de9ba4cb572f96a32a6b93b4dc88818b73a2fc0f181bde. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USASN0800509.