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 0x861e23ea16187607541b0a5b982f6a56076dba20b3ff4977192bff04dad5b771. 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/10a9ef0b-92b9-4e16-bd58-f3238ca758fb.json and https://artists.proofprofile.net/proofs/artist/10a9ef0b-92b9-4e16-bd58-f3238ca758fb.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 0xa33ca456c2aee67864df8ec554bc1b5c1c20ab59c03d4687cdd68d3de94ff9ad. 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/CAOOK2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e88b62002f18df987892394c9d1405fc7cc78e0ac00636f98b73b8b29a306ae. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAOOK2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e2e9e9edd816fe183ca8a50ffe46a628f6523e7600fc384714f16345601bed. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USFMA1900241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e8b21d99bd891c857f65f8bbeb3da921bdf661ae950c6e404a60bb8ee499dd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USFMA1900327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70445dedfe0f5171ef6991373fe757b114ad2f5ee44f1587febc514fb9764eb. 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/USFMA1900328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9334f10a188296d59f8a903b45e049985f9f3c3377dd7df483aa4bdb33d749. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USFMA1900330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf587d05a76df50c670eccebe54da46d4381322277067466b21d0321071b18df. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USFMA1900332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65db1037c4d00ac6188dccf51b3e48e1b9969278679cc5e9e6ac9c4d1d7aa560. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USFMA1900334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27164084478cb9c4f6eb39c9afbf909c12c2acb3cd904f4b5bb5a0912ab90da4. 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/US27Q2358602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920cbf718344bd2332f23830314b36254ac87e0f936805ae5f74a4eec71d836d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US27Q2358606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0457a16ba4a8109c8ec397044b0e921a62473171fa86dcc5903205d9b2f92d4. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/US27Q2358607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc497ef154cac01df39a86332ada3ad5f4f665547d8c7f4267d9ecca6503357. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:56:57Z), 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/US27Q2358609.