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 0x1e8b756aa4eeee28540f2d2fa4f06e4aac745e03fbd97cb52775e380db44474d. 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/da4917f5-86ef-4ac6-a9c1-68fb7a00e4c8.json and https://artists.proofprofile.net/proofs/artist/da4917f5-86ef-4ac6-a9c1-68fb7a00e4c8.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 0x4b87c2053d6d706189f03290824f392be0d19aacb448f2c7b8c460d40e6c4e9a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZWFG2461139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecf5d8693318c331454bc1d8130bce1dcfaf8c71b6b8f55c15562a33e898ab0. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:43:41Z), 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/QZWFG2461140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ff365569f8f21579c005f3f2145ddd852de11e77b1c2a67e6d5b699cfb3ccf. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZWFG2461142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986b850a0afcb727bc6ff3f915a4aec36a90679a86a78c9cdf9d9e241f994e00. 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/QZWFG2461143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbdc3f1b4c1ff04468d54522d957e64c4635d5859506396ea807784ed11d790. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFG2461144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385067411896282d4ffa485eee9762c23fdbb2ddfbd55308075f3100498ebf8e. 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/QZWFG2461145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc36b15c76e6ae461fef0869c180d8fa8341142e01bc7c9b15029ac1b4e62e61. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:24Z), 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/QZWFG2461147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11463f11087b6acbc76253c3a8a8361d288d07b9f071874c65111116eea7fb3. 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/QZK6G2595109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a35adededa6fc3a21b48c617db6e3f3c0d648861cd29a5d4c742df6b2ca0a6. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZK6F2592933.