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 0xaf2c2e4b88069871aec450922a4945a30fb4b440a3e5213a7627ba58f47bef36. 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/4899ffba-c1dd-43e9-8d80-9538a3cede1d.json and https://artists.proofprofile.net/proofs/artist/4899ffba-c1dd-43e9-8d80-9538a3cede1d.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 0x9b764f0be6e6cb2cded3a26520fa765ee7e8b5150f3415920f3a8405a6d655cc. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZHN72254568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391ff7e9bd735d042b7564fe45423c9a7daef775a271546dad603c527c5376d4. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZRP52214423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fa5f1b4414395e0a5c3b9adaee72b9628f0f762696836ce6560777f3a6b2ee. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZRP52214424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cc26931f327c6d517fbfb5fe10bc5a39589346ebdc4d4cad0698e1edbdd5b3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN32248698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabda5f722ef86f96623b7a081e511c2784d9d29564add2a5ac936120fc8f7389. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTB92283705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8fa9530e410433ec4af1146c1f37c2c136fe7e2549684940ac50b3cefbe894. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZHNB2339150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe450c401257847dd6d181dcb36640cefb5577c0e9118aef0dbc0be9af83783. 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/QZNWV2343559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0372474adf8a259eb4fc6affa25aa12e45277ddca795db0d5d294a8b17c136f. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZNWV2343560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda8aa4d5bb1f55da1b742b2dd7f42ef84942725da594cd4ddd56e8da9048393. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWV2343561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8013052b27822aeff81dc719af30ca95d295a5634c023896a8018133fd466722. 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/QZES92321155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cc047c5865d1d5c9549ad3891da22af13784d8c2898528bbbc486179fc23a8. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZVEM2336328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede2e6cc3e07f406e5454ddd1edf7132bdb283b0893448551899f8966605ac33. 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/QZNWV2343563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aea30ea3d1448ee7f1fcc7fb8ba37dcaecadf5274e04c554ff3c54c67337ba4. 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/QZTB32347830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a53214fc9a0efadbdb4db641b08f75e0862bf47134bda7853c9ce085dfb9d1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPEW2456145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0395e046cfcf0d1301e1ed6f6f9e98ab6b8cb330d665196f1d6fafd7ae3320. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/TLVEM2454433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b83e4af26b3f249733919c2fec64c018a0f87327a607812b43264f15ea8e626. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZZ7L2431625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32783a7f53b41da09206f031f6d9d2ab4c161f45ddf73861dff18f64af85e567. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZZ7P2454193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef839090edc4de2d3edf0cedc0a60d983dff5e695ea0cebcd1ede107bd632d3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMDA62525769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690e0eb6752c5c5d9ee20759dfde88c14cffff15b2da4d98dc80894b89adcfa5. 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/QM6N22562566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08dbdf2f89f1b7943ff3807940c211020b0327679e5dec1528e422c91411b5f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QM7282580002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899b40b31dcecfb721939475741981e4b423359701e730532ea179b13e75f327. 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/QMDA62577527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405fc716dba2075efc62a2f74d602e8c0ae2e587c7d6ba0d1ee1abcecac2be37. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QMDA62525807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11bb771075772a19a7996e9fbcb721bb99ff7121b4b76d09350b068d031d266. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QMDA62565403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe837a4c03fec4f97ebf550c15223b0778d546b55c821d49457fa7ac234ef156d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QMDA62565409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a577ef774c3fb12b1c97b6ff3943d1d491ebe0ab73a9cbb86c8de341b9ffe52. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QMDA62598596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582dcb7c6fa2bd275c7bac336ba3b17a9f1e39dc8ac729b51fa519b060d21d05. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QMDA62565451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7d1269cd51e65e14c5cf6955217214f7cf28e54654bea5c05c2e80ef6a7aca. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA62565484.