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 0x02643830f15493f388cc7f4443e7d8a74337be3231befd604a0510ae9dc56873. 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/dcac092c-65d3-4928-ab3a-4bef2e54b9a8.json and https://artists.proofprofile.net/proofs/artist/dcac092c-65d3-4928-ab3a-4bef2e54b9a8.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 0x2d2aab375672365c77b412a12edc4a6435fc3ad1b2ab65950d7e7d70ce675fd4. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USQY51203361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc729df8de9792477f7f273191d9ca232125d4c8bf599bd9c9b1da282b6f02dce. 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/USQY51203364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb0b1a9d71e82ca7d673f81d33adec06f6362f98b7b41114e7be0b0e2de3f40. 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/USQY51203368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6569552389469edee7bef73830a699dfef67e01aabbbe4ab966bec71b553e776. 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/QZDA52149804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb150d898a6f098c9f5a9ce718ccb54681d2055dcdb38f92baa36f8401b475c02. 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/QZDA52149806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e308c5d3018cc998deec2d04fde892fc03c9ada531a04c1397aecc5282bf85. 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/QZDA52149809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0802ed646a8559a7fab90d1b64c2a1d34d5727f7c2b0db07138cdcd29bda544. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA52149810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ab0d23d6a96d6d8493fcb3fc4b7e0ffdc59c8f7c1fc641af43a9a42bda5fe3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:22:15Z), 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/QZHN82273520.