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 0x67037c0a48a4f80f417168c7648417c269c4fd18c951cd41e7d9f7d0174b85af. 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/88fba23a-ffa9-48fd-b016-0ee61abd0d1a.json and https://artists.proofprofile.net/proofs/artist/88fba23a-ffa9-48fd-b016-0ee61abd0d1a.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 0x68435b3cbcaa4cfe891be1b7512e37bb41e1dc6bb04f4c430f7d4395a0ef1699. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:52Z), 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/US25X2202543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1be203998c3980136218a2b387cbd1d4d4dad7ccf19da337fa4ca2553fa6df2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/US25X2202544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3e9e5c662a3c564e4bd39d6829dc4355815f0a6fc7d6dd17b16c4196164e40. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:36:33Z), 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/US25X2202545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781440fcc52c9e458751e9de44bf6dd5e8d0dca92a78251cf57c79b8efcc4aaf. 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/US25X2202546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f27208d3c59fa8b119e365f630edcc852a51e2dd50235f0acecb2178e0a490. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:45:39Z), 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/US25X2202547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af8422f112ea6e18a91ecc9e8377e45dab5aecbb57d4ea0d06c0249ca58f307. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US25X2202549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc26dd6c0bd52e744c8506e438fe9851aab6a59d5e62fd4c9260e823d8fc3ad. 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/GBWUL2408224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d6a43e2701fcabfdef86eb1bef58e12b2a50978f02c38ea9def84e87d27ad1. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:36:51Z), 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/GBWUL2408250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea957e5a0ac9bd5b2a288212fa7ab6a0bdaf60bd2d47090f8ac381901b31eaa2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:31:15Z), 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/GBWUL2408268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c0107dff0d2a1ab87b9b49020e124bdf47f911d9ea57034defc3fe26aa1703. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZDA82288200.