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 0xcb13e75204a4566d4fd9b8c150d1f121afebe535530509efc1f6bbeaa418b492. 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/ea5fd3bb-40ef-4785-93df-95ddbeba85da.json and https://artists.proofprofile.net/proofs/artist/ea5fd3bb-40ef-4785-93df-95ddbeba85da.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 0xdebcf58725e6b2e9ab526c6c79b01fe076ce493224735e833f7066735c67f1f1. 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/ZB1T01700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6008d9cc88e370a15fbfbdc0876e3ed7e1c09e8c0bd3c9c0d26251a561d431. 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/ZB1T01700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46052f9804a35a748f25c0f49fc327cd998e1fecb13beb331d98cf3fac6b75e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:49:34Z), 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/QMQ3X1801036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342e3d6d9a9069e228ef9bfbc0a6b0f20fbc138968d4d58f09e87294fa4de1ce. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:56Z), 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/QMQ3X1801039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553ea674e69505955584ca2d2b662f81fdb15a67eca657ef00899af6c83b0a3c. 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/ZAIRK2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb1ded84fbfc6cc3b37dcc40ed22338d30059369d39131e263b4f486f1871b3. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ZAIRK2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e6a19060f5e8ac51dfb078fb8f31e363ad5e402a0e046f1ce895b4b9c07050. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ZAIRK2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2283c645876e8d4d7404ba164b9cf0e7e5b4f30d19509c7391719e2e47b94fc7. 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/ZAIRK2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905bced8108f61e220bf23be0f5f15c8fbbfeb6a695f9d6f3fde3c0cbee6c996. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZAIRK2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e0c80a6f5bbc92605c1666d7540276c67db2abe6628678d2dfbbdec9e6ec27. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ZAIRK2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da51298f0d77f8c544c8928598f99a0ee1e3567ea08fc213c6a912d6eff4a3e. 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/ZAIRK2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a91f1caa02958e440b0d607747c1d6e579725d91eff79d8d7e896d1fed8b302. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ZAIRK2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff79549f69b004aafff19c9e3b4b45d8899045ca7f27be9c7b4183a1ed73339. 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/ZAIRK2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8c0386694d651107149e7730a1e071d9df17e452e697da93f5a3d408929a1c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ZAIRK2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7234ae8c2cb367e3057d253324e706c3c6b31c381ac608a9986c7a3ec1cfb6c3. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:28:46Z), 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/ZAIRK2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a9672a3e3a84b9a11c56d6bcbefe9592df619a39d22ce426d583bf111b04cc. 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/ZAIRK2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c43d743c9f244dc08fd598ec0807e7a1c8f1086e4969321dc9029aa4dec2a7b. 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/ZAIRK2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a9c742375f27b6d8b7941fdb7e701f7b14884b2184366d464abb41293fed68. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZAIRK2300013.