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 0x19929231ee6aa97f4e970a848818dde5f4423e45eed9523f7ed60189434504a2. 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/3d704c83-5ce6-4e5a-b3c6-699d08463809.json and https://artists.proofprofile.net/proofs/artist/3d704c83-5ce6-4e5a-b3c6-699d08463809.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 0xdf4633d462c1ea4c29238cfd1e6354705de055eac1a895e1e17d97e81e34e1b2. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DEU601706690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3603f410245fbcbe6b32782b04b91f749c5d5962bf96f91bf432d5d016ac0a9. 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/DEU601706692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e651cee8e21ec4ca2454d61137794613159003ba81425f11e544315050c0d9. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:31:09Z), 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/DEU601706694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b8ef5e3c5e9f4039b946388271ed3373f87d368d10c51520b9b451d92c20ff. 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/DEU601706695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2275c43ff85aa4bb98d2aa01e64bd79d33c132e32fe7046f3e17e90b533fe6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEU601706696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965270aa2f6df364bfca60927e903eb4c05fd9ed882a77ce95a764bf439a9f5a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEU601706697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf188cb288aa1522677bebb398fc74623302339357a63884d18b45195f931a7ad. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEU601807661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c80ac1a0e51e6aa501df21532007cb4dbaf0bc9f2c80e61f4202adbe176ed7a. 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/DEU601807662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23b5d3d635ad146f971cf18534a8799006a3d0f55e5ba4c3bdf6efbcae4b079. 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/DEU601807667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe2c5b1440ce5eb6941ae5a599a155640b8b6c0bc82ce5d701802701bbbd9c0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZMJZ2000009.