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 0x97a703855c48b60387fab6f863fba8892e18b4fd47d4ab8889c78dc094a01ef5. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78fb95a2-ed11-420c-9304-d27f0bf35d1b.json and https://artists.proofprofile.net/proofs/artist/78fb95a2-ed11-420c-9304-d27f0bf35d1b.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 0x2ebe3a4c7919b6e8ca116bbe9b0147e361cceacc13c8b87b43a33e2292bb775c. 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/USNL19900735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fdb85ab37108052ad62c15b227922e6c3418a3c4234747a4aa276eb4f16e79. 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/USNL19900736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0976fc136a994645ec30a59fdca71e4ba416734cc13079a9c7c6938c41620130. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USNL19900737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe238ae0abbdf8accbcaf5e7e76bcb8823a0077b189352fa91a9157dd565f8906. 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/USNL19900739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aea5a8046ea9064bedb89872ed79a581062fc98a8bfcab6b01a839c8183ae5f. 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/USNL19900740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f71d37547cb4817f137e9067b986e628c7ac78be8c0172bc0fbfedda2dd934a. 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/USNL19900741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbed356759b173e813736422f185a9f4f59e8fb1809b5d324a733a2e031bb4c0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USNL19900743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0495bd6dacb59cf2fc60bdeb3c3b78d01e14e905fa55174d19667f79c65c512b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USNL19900744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05a9fb00fc1d33dbf427939c9f511a7c31a035e8c9343ecb4d1db62337e60e4. 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/USNL19900747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec60272702a93af3909a26f356dfc7fccce4b94b8eaf1dcaa88c3b0e15d3f3c. 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/USNL19900748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d97599de1efb3bfd1619cf359a200166ac2c1c314be472f316ffa8e9ed54f1. 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/USNL19900749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14666bcb14e2a4177521eff0231c5f38423708c0d6d06ed65bf462f8aafef99. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USNL19900751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a476c9a6184be220b050a68d0d3f2a21d46f9b5f6b329ce90a5a25ff81ae21e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USNL19900754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b701f8393dcda22567e79cc457a5274221c26eb0a5c4602f8d0bead48d0a2b. 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/USNL19900755.