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 0x6494e62e68b3736469c7265aa5dae2a064c1ce3dd28b3b65bd92af16b3949332. 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/a3429c5a-7d60-4ccc-9e6c-d4f8e6142b14.json and https://artists.proofprofile.net/proofs/artist/a3429c5a-7d60-4ccc-9e6c-d4f8e6142b14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
With Roots Above And Branches Below (Standard Edition)
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 0x2730bb0e716c93cd3c9a5e420d08c3fc6837f97fcc452a7b0b6475f8a7fbaf22. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3H40912303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae6fd30af55ffee69bf876c0a709e6ca4b2cae15be32f025e39df73ca896a72. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3H40912306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc5ab02835ff9ee3c59f61b6a6393cd109a0479db608a4844f06598248cc35a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3H40912307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0080c2b7f03521ee5ef2c8dfcb4445dcd55707f51081dd1b71c17a245feda951. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US3H40912309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2331b2fc20602fff07dbc6241cc6e855663d74a1cdf7ab7d365fe5a2607b16. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3H40912310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fdc0ed282544595bb9a62486ceac8fa8bfe1b0a70e243e1d7e1f1dbd20469f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3H41013802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390ce72f5cff6e49410799506c9acc4e336fdb20369455ef0667d961b4b5300f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3H41013804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c41c8f55773d17339054b8dcb59e7a58d97edf632f5dba130ec3fb076f7ba3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3H41114303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a4638ead2b086a25dd9f9717d9f7eec35d3421b109c92b9245d800f9c6a33a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLA321392703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3057cee620c5254241a1136fc5edad8f6895e7b01d4c5ac02e322c4ec0b722. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US5260810809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde172e26b1275e231d325f7f797f8068572ccd8feef4e9fd12cc69b395e016c8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMGVJ2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcf565ac07af711797516a4ac1a4b9bfa9e2d47da0fae305f0c78a4cff4a50a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHCR2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcf565ac07af711797516a4ac1a4b9bfa9e2d47da0fae305f0c78a4cff4a50a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHCR2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383fe762ae571fcd220edd9922fa90f28cf6336028cd8bb2af8f25ade5428b1b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMGVJ2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6608355a7f2968195a943ec757560947b27f512e25c069a62daf0bfaefafeeb4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMGVJ2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3054ac5a789afe635c288dbe6318ebb9c336cd2bfbd790688f6ea67bda204109. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/NLA321392699.
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