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 0x218cf5a8c310e64dfe9278ec81e7f5ca8b6fcb30e3bc55f4aab0ee27a84da3d1. 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/2cb0af09-4a30-4fb3-9d38-7c9d92e9cbf6.json and https://artists.proofprofile.net/proofs/artist/2cb0af09-4a30-4fb3-9d38-7c9d92e9cbf6.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 0x37dfeac65b63b8403d30791906bcd8261d1cc5500dcb3a54cafc4fad2e7d6280. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZJG52580717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb905b6c983657b55f3a9acd7daeff404b39272133283fadf6ebb8bb0e99c94d. 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/QZNMT2540173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadefbcb1e97760fc826123e63879df8091c52cab3e31f01d0a9f1aedffe8cce. 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/QZNMT2587271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d64f1a5df887bdb97aeff7b0a01918bd41f21f88b29c2ecd42700ac175d385. 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/QZA742524873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b9a0577c82b1a557531e3a30fa4beaf38b02ea2d5f2f7f46effbd4b4145392. 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/QZNMU2564537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2c6a77ac60232f7bc4066774802bc49a355830266729551c6b143f5be94880. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZA742525317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984a4d88dbea09008956a58eae7643190a04c9306f62500f805d78170ee51d2f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:59:10Z), 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/QZA742525533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd177f601aeb1b65a888eebafc162366db0f8fddd0b0253e24eddaf752c1024. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:57:17Z), 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/QZA742525660.