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 0x607eb491b3ab42f6bc618f6166922c24c2707709081886ed940e4de731a5ebc6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/048bce36-960d-4c6d-b6c3-2d6c5e68e488.json and https://artists.proofprofile.net/proofs/artist/048bce36-960d-4c6d-b6c3-2d6c5e68e488.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 0xfc45dc3a57de6832771f2d3ce7ed19bb4b57363e1a2c79a4c8ded264c91aff66. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES82117726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03390646f8ab19cd5b8ac73b1568e9de04525d78c4fa4e8de64d7b4e8e1079ef. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMER2128633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d081e8012af3d6a2a8cb2696d64a1d587b8a91ace4cf4be46990d957e69dff. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFZ22213940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7ac858a7fe6b1d2864e0cd5a054eeddafbd4a8e39f66890fc736dc4c8d3a07. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN32271385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a819a00273f3dffd4ad226f168d214837cf79432c186a2263d5b2199bc8318. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:04:18Z), 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/QZES92206122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f4ad6e7084d27727ed4519cf68bf3e42832f87d05040f44d262ae8db507e20. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6M2247117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1313c628a0c73c27b90a3a80a5fa00905017045788b802996e61b135b75130c9. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZK6H2219798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e88f1d34ad1042efec19b87e5cfe263fc406ad4787fa26e69dd00decf7c3b9c. 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/QZHNA2399697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2349b2187555f5c5deb5a38a88e981d74296a6d516767a4406bf467f0cde0970. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/QZHNA2399701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931160c0c54425e98bf41f7f3f1fbb31e922dd398d0ea468f9e18b8f2d00e413. 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/QZHNA2399703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b052fb7d719e919400f2277d603bd15685e1a8c20b4dab64aca9a91bd21e5e5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAT2304932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a217e313573ef8165811590471fcc6a16bbf0fa32934afa70af68fad5c3b682. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:21:11Z), 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/USLD91767425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddde24641df0974f2925658b0fc1fca1fa00d5c0a2441858e644b521da15a00f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/USLD91776338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd588bf02937cc44bf80f7f885abc4527faea40f6fd1662b7ec28e4be1e463b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USLD91776337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00950ad92a328bab592ca41f4e8daab266b08ad7f59acda7c2bde9ac653c4fb4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS652276136.