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 0xdaeb857704b02769b4e9e320d4a6defb6091d0b883127bf071d4778927b9f313. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d22373c-5cfc-43e4-808d-25577f931151.json and https://artists.proofprofile.net/proofs/artist/1d22373c-5cfc-43e4-808d-25577f931151.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 0xe43d33bc9017c57c6bee28a95d6a31398c5f14213e724c82384131477d653103. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAEK1989163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4301918526093bb8111e8eefae9e31b1e6389ff895a4c0d116d979479cf211b9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:20:47Z), 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/FR9DZ1901645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a82d241cd048a18840cad62cc45ba52e1cee2df9796823226ac20f46615d4b. 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/FR9DZ1901531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81705b91f4192b5eef87749f8d4e2c8fbb6b25d2033f213af8c50fc172f92d5e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FR9DZ1902143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46ff2c613dcb1e74993d8cec98dd1fc2b3fdde26486a11c4272b6f6462941a3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEY2081345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d3e1013bfe1e7ce2763b3dc7d59f85b56309a0602a25c543ea347a9884eef6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:50:10Z), 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/FR9DZ2001577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac59229dbf29f78a98719e1d49c869dc186144896cfa77da42a9c6c12467cc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAGC2275332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd5dea31618ec4a419e6c8b3141709636f52d8805dab2e4c43885db1845c892. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAGC2275361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da768b91d01eaeba9119873650d6cca8c05f5b2f5547c404f4935d24d7690bc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAGC2275375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93549b7122614893e1432822200235ae47729320d1df70b661355145d0686e34. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAGC2275393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13317c1520c94ba55ecc84c1eba045beee90816ed4714be754dc47fc4431c697. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:28Z), 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/TCAGU2335514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2d61dc26034bcb65def1c1111f74a86ecad203015c67e12043dc55542cdf38. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHX2453463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e06ad49bb95f8c55cb49709453ad35aa6a08c4ac1eced42b5619a9b92857f12. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPLS2474256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff002114288918a23af2dd1c529610e0b35b087a3309906649ebe169dc0c4e81. 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/TCAJF2597034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb1b8da12c7aa6275b92ee67b227a079a3ef45c60e87c495040859c9d26b8d3. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCAJO2500563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c267f720c47c2ba19335338d54e71f4829fd3e6580f6ab8ae91e9791d3fad3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT6622526348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72371f25a0f25761af27cf29a713daf76ddcf26775de4a84f56528a98b1f5e4e. 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/TCAFA2009710.