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 0x1d4b51a4e4459ab071019240bfab318b0d90ad0d9a37177b9fc5003024a7183b. 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/29c1af79-ba6d-4fa1-b0b0-738399f8115c.json and https://artists.proofprofile.net/proofs/artist/29c1af79-ba6d-4fa1-b0b0-738399f8115c.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 0x0a8d1c3ffa8df7ba35863de9b9145412da7d7975a6628a11574c385c24919804. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:14Z), 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/PLA281600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ba07fcd93a641e0d9e3ef88479fd5f49e3e8a8088686657e0fc09a1b979861. 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/PLA281600042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0cf523e13a03e144096a3fb3bcb55c23db964baf875b95acda3bed90e62e63. 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/PLA281600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7af819006b7c4de5b64db0166d019e2f0118203267297dbb8384e2d42f2300. 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/PLA281600079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab296f237cd74458cc1108eb64d6998df6b5ed84d34b110061c7b708cf6dd045. 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/PLA281700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b966f915298de0af570c03e80bfd0b8cd1062a3484da7f3f4882ddde798231b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLA281700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7c39171a28e0dad6fbbe0188893011a4fcf2d5f7e0bb17a806b6e25e33f0c9. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:11:39Z), 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/PLA281600147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aad9cc6cb781b4897bee04ddd92b9d07f081df2adf701eec87d7b86e465c01. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLA281800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0628e3307a7a4616f2734965d92c600ac3ac0725882fa6402d47af6d28e6b94. 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/PLA281800010.