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 0xeec16633d7ab22e9d482e19d6901784fd4e2849dc4add3802449d68b1b438307. 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/f436a3ae-3674-4abf-bb43-37e5bae8adea.json and https://artists.proofprofile.net/proofs/artist/f436a3ae-3674-4abf-bb43-37e5bae8adea.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 0xf0cdc6f6d899b497cc9f6df98a0ee01ae5f053124b1508c34d9e0c9755ff6bf0. 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/QZMHM2002799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ac067dd54d8ce249221f37bd0a7a8ae5f52a014f1bef1781f71cd6188cf68b. 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/US3DF2172084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abe062edf73752b017d6d9dc2698af3c0fb2122e383bdc58d5e5733b31a2e4e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBLV62119377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3500300cbc191581cb8f4a688b2490bf4a2e07051bb579e13b9e039dad915760. 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/GBLV62119379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01de5366e799d34bdd1fcd4f12195ed4f97cde60161418b743cbe08efaf0873. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:26:52Z), 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/GBLV62119380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a1bb0b16b46e47a5b64ee40085e0b34b52dad854b4b8ed67c83a6b05b8b408. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/GBLV62119382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd84e28c1dda7fabde19bc60a09284ba15498c011e330238e0c8c8995c9815bb. 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/QZS652178801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98cdb24b5cb0433025d3c8a0053577e384faace7ab0a1a0e5573d32bb483b14. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QM42K2231128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1964f3c94dc5dcbbacd7072091dd1ef7c74ffa40e5cfd2f119797a37bc686166. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:09:04Z), 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/AUMEV2253599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fbb776112d760f2229025efda2cea3ca6482e78b5165637dcee504c1a2891d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BCD4N2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a2c2d4bee8308b5c78a1dd23e8e7347402855153c32c9e01c7be8317369914. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USANG2201418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21da9a3dca611f9bdce1152d1185f48000a3bdb8a921904eb48fb54a5253de3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3DF2441476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ab80b8e9ec6f44a8acb5d295603a896309811e5786d4991b024ea931d4fbda. 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/GBKQU2222684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120396881f1ba236d4eb69fc9c2786adfd9cf4a42bdad38026444bc3c0cc773a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKZGC2300477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f39eea03e5a00fc5fcd8b1ab7070380da85fab1829dfe2a665d8da652de63d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCD4N2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a192474d89346aa66591d9dc6a7a24c8e7ed0b482298c2a5daa056546cfc360. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USANG2162304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67062e1643e8e8f52192744f2156bf38a9f7e4d6d1f1e3c3e5e1b251dbcb38c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3DF2219989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e10888a5a22bbf533916b135f26f4719c9beb15a0c833a1b7bef6e5924ffd1a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US3DF2243503.
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