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 0x41e7c924d4e9443e287deb99ff34fcc5726895f96822af4af29dd3046c13e6c4. 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/f89c3422-b6bd-4d24-8184-1c1d9ea13d98.json and https://artists.proofprofile.net/proofs/artist/f89c3422-b6bd-4d24-8184-1c1d9ea13d98.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 0xd3c90e5bbcee3bb86fa0251715b8116e3e3dac90ab43e7cd00e0d84689ff1cf7. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SE66N2220633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb0253bc4e97f59cb937be23fa434124692a9cdded486ab1006e09b37e4b447. 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/QZHN82128297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078211397c493fa93b253878a69baaf77a801ed282523f88bb135fd7158403d4. 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/TCAHC2364918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb449cecec96b77d01b13dcc343e8f2803efa92d69e9da020a2d8f36348e9d3e2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:28:03Z), 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/TCAHM2399735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96882e4e968f9993b122c22cb407f4021c0f0aaad3207b0584fd2a500ab0a6c1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAHM2399758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1748daa6bcae137a231da53a79175692da11c33a3b2803cf96d78b9dbf0e59. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAHL2329407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd295ccd27be0cfb08a250d6f1e17e6688b2da7eb715741ae826dbc0a53ec53f5. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:50:00Z), 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/TCAHM2399799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada1a4a5ba580a84baced17bee7732cc3e57ec36e2aa76b2ae7c8e570e13e4af. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCAHM2399851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444fe1ebace62117992b9b9aefa547eec198bf63173fb8dde2f38bfd6d5915fa. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAHS2380530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afe28f10c4dff9b70c985f81fad864af17f7f1452f3661f39db92aa9d4485cd. 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/TCAHT2446971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108d28ff4af8a6e7d3a9db3617349083760ab9a116e3e8cb95691a9a005c5104. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:48:32Z), 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/TCAHX2485230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cd0c8182c123beecc50bf1c18794ec6bdb49d338d9a09d6ecd0298a3f9cb61. 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/TCAID2481061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e9c3ed419ef58ad1ad195b5cc1997bb6e242ca99d9ecbd078be2df2ae54085. 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/TCAIF2453534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff102ccd771c05488795c23110d8bc1104139b75e1de1809ca27f071b8f6763. 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/TCAJD2446498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0912e40734b0bc920e7cec4ea0b2809a25f86f8ddd30898bae86611246283d36. 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/TCAJE2545285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfbaca1bff6672c541ca04ae9e880ac06a35af24bfbe8143ee4ac7c7e6f195c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAJG2521187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eed92fa15af361641630690b9304ab0fe86cdd0b4bd15a1dbf641cfec09b204. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAJY2518503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafec2af2bf1a7eeb651c576c0b13e6ce2e3b2c91603cad37ff02b040226e2a7b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:08:08Z), 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/PHS112500665.