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 0x0c743e831a92e4638c4c211fbe531db5a41aa24ddf32bfc5fbca0cba7c198fdc. 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/36a4ceef-85ab-4e45-802c-83de2d79cb09.json and https://artists.proofprofile.net/proofs/artist/36a4ceef-85ab-4e45-802c-83de2d79cb09.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 0x50daa3507e631bb0e34612bf0d7abcec10ec137bb5ac81c1d20221b3103699c9. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FR6V82228742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ecf8319431d3ecb073b9daf445d34ef48dee99cbcdc7fed17deaa1ff6afefd. 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/FR6V82228745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e478da23f7f7e41d10697817bd307354e454b270f725289c0b1a0a447b226a. 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/FR6V82228747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0909d5855a0cb1f90a77d9c88af0d2e2a3a18e595ced4b0c50edddc8d8a5f5b7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR26V1548461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d63ff561d0bc434b425822d541aa5b894327958efa730c400a1992b2689df5e. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/FR26V1548462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb0eb41a3fbc999622f2e9f72e64f7d7a39eb2a9166351270318efd3ef56b4f. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/FR26V1548464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa4a40a6e8d0f510aeb7dd20a1c70593a1e47932bff3c7ca5059f57b44147e2. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/FR26V1548465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c266a3092af83e93fb89395b169150c990c9debec9a54b63deccf5b15d4b900. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR26V1548468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22154d750c6c322272babba51f0117a9a9170c1e850a53f819954f3063b96bc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCADT1829558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd92d851c766d4f102b0d548f70065e4cab83d9b37f83192b33b862ceeebe90. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADT1829563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa29e7714fe4b5547c6b677cd950b8decf76f0290024d36e6d00ba34b8c3029. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/TCAGO2225622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb570df3e484ce01524ae1a22d736cde3ebb5c8ad2a396a24ce376273c524056. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGO2225141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a9f29b8cd3118426789ccfe8539160eaf2e3ec3f016a9ff3572e07f5179054. 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/TCAJA2466266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d3b0da28846f8e7c6af57dcf514903817f161720fc8487d27074e450fb9e3d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAJA2466276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f5a81adb27c52874e3ad48128f2018648cd5d8387c4b46e136bfad79b0d94c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAIZ2466284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a38997a8cb587f16f94c04eadcbb1bbb65b0647e5c507669051a0f9e035a93c. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/TCAIZ2466299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc840a51c35686d5a1a7b6f373703c62510a09c92178f1212c489c9cf9e67f126. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAIZ2466292.