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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b64a5c319bb43ce69258d4034618a0f951c87cee58b8ebe591a1176513d1f9. 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/d1d92ca2-1a7c-4c25-90ea-71279d7bd1fd.json and https://artists.proofprofile.net/proofs/artist/d1d92ca2-1a7c-4c25-90ea-71279d7bd1fd.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeed5aaf2fbd275f35ce753fb1f9b49796578725df368fb24b3e039f0ba65868. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR10S2038856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec96c2f615adc2474e32571c95b436629aa361a63f2ddf07325d0ffb6f1672. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FR10S2038860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3f2d7cef4ed5b3a081926c042140ed1f39b5e1d27277e5b10350b5a72bb3ed. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IL7192300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334d2f0fee1d8e58e23dc2bc12b8dca9f3e2a93e18ebc63f6c06b85e36428cec. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/IL7192300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1418187d1f8561df7b2102341a723539f1f4c709fa8b4423e9e702afe50c3363. 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/IL7192401160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56c5694e3433e35cd0a98068ef9f71302126d0f8676a91eff100bd5432abf58. 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/IL7192402357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda84dbc72a45bc0e78568a97e2626fb9cb2665193304c6a340e708889489ac8b. 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/IL7192402498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3aa2e8120f663ca9ab6f0aaf9123a050bd1b3537530272593f3598b91fea420. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IL7192402500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8188939796a09d2fd5232bbc2a5a62c0bfc6dbeaa42ab229ef4a32aa7cfb92. 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/IL7192402503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d53a228c18cbacf6254ff0fd9feb21fc4beaac9fb12062fb84c64bf3227545. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/IL7192402505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958bc6ca87a4cbdba007229d47f9f3423868fa9cd83d6077c9035a528f62f8ec. 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/IL7192402506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9181c0d7cbe62348afd73476382ba04360353bac3913f05244343c3df5af8a83. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DGA062502302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bcd7dff2bdb1501f7c73827ad97c8867a0bb130f05856825752c2cc54e2805. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAZ2543962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5eabd7ad85262ee7e990f6fce300aa15dc20f9e3cfe79db88bd4a5964ca853. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZTAZ2543974.