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 0x64b639257d5fe70fb18da2a2d97d9b072f1270bb1f4277791f10bd76ef1f571a. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03d4156e-c893-44e1-b8d5-6fbee858c30a.json and https://artists.proofprofile.net/proofs/artist/03d4156e-c893-44e1-b8d5-6fbee858c30a.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 0xc2fc74056d8d429d85a9647a33853c4d0107f561b7da2c824b0922e78c542ddd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USJ3V1115653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ca0444c306e49c14abb5afb176da82c26f44a911cd3cda71bfe0397df302a3. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:01:57Z), 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/USJ3V1114536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348cf85be9ee9c24995eca4bfba84bbabd0ee9bdf4330c3f874c5b0f9e668372. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:47:08Z), 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/USJ3V1114537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365281a3d1c9a308c8c1e840c4f9c0e876593fa51a9dae59bc0b75260e868e5c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USJ3V1114613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243527874f80f8b52ecd1ef8c7a12809ec0a9439ef2497bd1b5d473ba30519ae. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USJ3V1115276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf999e8559c2e41295bd49ebeba70d2de0723639624951bdc9de2ea37403c294. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/USJ3V1122030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916ddda031eb646e06500ece71b9822a707fd932f8d3b74992360f9d6f916419. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USJ3V1122031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d66c9d1d59655e2c2722dd3a2679f4e42a801fb463666d2f27c059832c9d253. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:29Z), 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/USJ3V1122032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54363ae7642b15efde35b35a0697107e3afe51493d78c9f61e601fae1464369d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USJ3V1122035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ed444430d256a7fa356f2b2b89804153e85494543d78b8403a45171dde8dd0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:12:45Z), 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/USJ3V1122040.
E Le uma Le Alofa - Polu Aso Paletaoga, Vol. 19