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 0x5119aa35ef4d3e523b79894ded3ad44afe8e2ea2ee67e63088e69eccb2934541. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ade90e44-5ddd-4a92-8ed2-c52b2c19cbeb.json and https://artists.proofprofile.net/proofs/artist/ade90e44-5ddd-4a92-8ed2-c52b2c19cbeb.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 0x4e57154ebd460d642be0a35b030cc1ed0106bde67d62a9de96ec6e4ac566d5d8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/LVL151900495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a81a64a172f8b0d728ebcb1f10b18f470b7ecc919ab96eb4ade039797c02b02. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/LVL151802914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57469958f8a1adf9de08e9b3691884f2dc9de2fdaeca06d389b7efc78d16ba00. 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/LVL151902345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0119df7f8dc5b4f855ff3b016bcc9ae8dddfbbbc975e83ecdcd0501bbee66e3a. 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/LVL152106120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be3cd66e8adff7aa95f7343296945eba8c237a4827b443463c532baac7be749. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:28:37Z), 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/LVL152301184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7063c8a8d40fd62a245723ca6292fd40cc9b79f37ff8084035379395d01022f8. 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/LVL152301178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9709efe042e1ee3d501cc39bb7bd45ec5bc79f4442cda869988a4c6240392eb. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/LVL152202488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff37e271a1603f5be25fd8059a17f3956c4c24fcd0eeb1af695a5cc1997d87b. 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/LVL152301180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d418bafbf35d342096d7b12f106accca3df0407e42edfd900ea540a3d9fce6b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/LVL152303843.