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 0xf8b4fb6bb382c20a6e80f7d9c976b40f82fd681dd27b599baa0a234933eda8c1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2b70709-7698-4b34-a1a9-aad533f63426.json and https://artists.proofprofile.net/proofs/artist/d2b70709-7698-4b34-a1a9-aad533f63426.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 0x3c1666caa08a8766c9a2ec1c965522a72dea69e5761c6b89df362bcc4547165d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX201992596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c6abd9888f8b6215e0e768ecd6c7b4eec13ec647dfdb1a0bb749e23ec70b86. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX201992598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cd19b835e27e2c4533274525849541de8fc1c98eaa916d1999698803dc8f7b. 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/FRX201992600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe22c62e5e4554f0d73d00a9f830394b2992a142aac1d9af17293f80934f3620. 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/FRX201992601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac6288bf4181f23cca3130610d41e8eb4f95844f3f0af64efa038e0bcc04932. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX201992604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d014011313965ec702639c67e616c5be39ed3e0365ab62698c3461e860e985. 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/FRX201992608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3a94024c2b34a53e9abf10509f2e6cab5c09b7d6b7e7d3070eced6b8a4d62f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAGA2207908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b554aaacc460300e452294623eb488d81f5da285fb1f984c95710ec32b4fcdc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAGA2207909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46051e210ce1a7115bb7f979ab8dda5be2b2c38dced0b3d60c7b73bcda7dc290. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:12:28Z), 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/TCAGA2207911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1b12683b0429be4ac2a5747d276301bda0bd042c0ade45b6544724b98951fe. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAGA2207867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d67d403fdd56aafd659dbdafc62f6525934bb8516c37fabb3f92f5a6221159. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAGA2207877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1116d251f44600a06fc55d770dc40732776a919044d4cc8b861972ff0db99ba. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR96X2208930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa7332f5e1c87ef3184c6f8d8e8f7377d50f46aa2b4bfc853c2eccc2d50a9d8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GX5MY2277130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e99e4dd427a576187c242313e330fece6813e8caa15e723dcdd93518ccd4f30. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAGZ2345884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc8f81e39a3f8cdc4501198931129eecc7b02e962248ae58fb670a7bc77a856. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJP2574114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda02978168b45aa93695865c70bd67f13d3842f53090c7e7139d7284ed4ba7a7. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJP2574139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf419ca2c5e34e3a8d8e11eff92f66baa7265f6cf61dfcb1dd9fe77462cef7a21. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJX2560636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7f50f67d82f8ff30d37a7ec93087f1e94e124ce413af01563f9278c75d1c12. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJX2560665.