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 0xdb5723ccf4132793d87bdd7e5d2c3c5d6cc97c7138850bb38b5b7d751eaa55d2. 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/ed1d6848-e4d1-4ca9-be06-64ed16c6cbb8.json and https://artists.proofprofile.net/proofs/artist/ed1d6848-e4d1-4ca9-be06-64ed16c6cbb8.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 0x6a16982870d17fff9f8d3a7c6600cb6dd63ef7d5f5eca3b1c31ad479cc5045e2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DECE72301907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f561b3bf2dae274bc8c60847817a668a78d5631fad739e81e57ffbd11945988. 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/DECE72400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5176576f6ea63879d034d1fdfbb9edeac53eaaafc8f9b3c5e8293b814bc2d5e5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:20:45Z), 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/DECE72303102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae3545654b9d43666f5fd4d201297a4e3630be501533f5f4673a520386eaad3. 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/DECE72401722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e583a65047d9012d72dc0c19a89d6c144f861d9cc9e92b4171230982adae922. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DECE72401523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5176576f6ea63879d034d1fdfbb9edeac53eaaafc8f9b3c5e8293b814bc2d5e5. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:46:32Z), 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/DECE72303102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae3545654b9d43666f5fd4d201297a4e3630be501533f5f4673a520386eaad3. 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/DECE72401722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e583a65047d9012d72dc0c19a89d6c144f861d9cc9e92b4171230982adae922. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DECE72401523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5176576f6ea63879d034d1fdfbb9edeac53eaaafc8f9b3c5e8293b814bc2d5e5. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/DECE72303102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5ea660741c144afea50efad1dd5d4d576a11e1e45ed1f9d98d90f62c0e3c3e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DECE72303245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77138921b93b51da2f028a937fcbb5b2c4acf959eed9f8a2c07e96e5160be17. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DECE72402581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77138921b93b51da2f028a937fcbb5b2c4acf959eed9f8a2c07e96e5160be17. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:49Z), 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/DECE72402581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b2ef487a893780e88080aa0f55a1e6c658a07703e8c7d561be01f73aa8690a. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DECE72500259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea64c9232bbe87d92106932439716279559ba737616aae9aec0eaf3ae977eae. 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/DECE72402844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77138921b93b51da2f028a937fcbb5b2c4acf959eed9f8a2c07e96e5160be17. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:41:00Z), 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/DECE72402581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fccf5f395f4f8686132a91cad17f6faea5a0fdd56eea882bf6c97c399ca7730. 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/DECE72500517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b2ef487a893780e88080aa0f55a1e6c658a07703e8c7d561be01f73aa8690a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DECE72500259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea64c9232bbe87d92106932439716279559ba737616aae9aec0eaf3ae977eae. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DECE72402844.