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 0xc1f61d7f618f31208ffc86c9c01ef158436e3bfd188f60cbd85de29505f6c352. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b66e030-12e7-404c-bc96-a0dc3e2bbe2d.json and https://artists.proofprofile.net/proofs/artist/1b66e030-12e7-404c-bc96-a0dc3e2bbe2d.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 0x735dfd41270160be3c0dea77de47781477bcd56c7018888c5a4752e361ec2cbb. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:00Z), 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/QZNWX2374751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a868934803adf59208dad90eaede4491da6b124ffb15d4a8bbdff48b28626dd. 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/QZFZ62583952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed22d412d2899afcec8b56ff46bc4aa39688019d9e89497f4ace0bc013a7343. 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/QZDA72555725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db00b8af551a508ff75fa893a269d0f9b3648e2d36bac8d0634faa5bf4129d2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWW2554879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdada949fb34f5800e71163750a20be6d182ef33218fde4300d3396b7a600feb. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:29Z), 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/QZNWW2554882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818a01809423a627b5a0a94f24e230bb8031eab3ab13bbf52a67bc506ef172ae. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:25Z), 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/QZNWW2554883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c09c3e70aa1ed1c43e524920555ccf8da174346f2856a75e02fdc2addd1c8d8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWW2554884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8802ddd04ae2af719f80cc94431182d7dc13b1196ac62544405a74e018d4640. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:30:16Z), 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/QZNWW2554885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67693762db2179fa8a974c79a3c33a30d3dd66ee2fd11c7f7f2b798f04b30365. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWW2554886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99ceb3facb43bee59f9770d8624866b56661a66f1a51154ed03337e04e79f6b. 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/QZNWW2554887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e41414d68af9e5f088bb9dbff4cb8b6308b8f508e4105a3e10a22ad6b40245. 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/QZNWW2554888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608d80bd15c5c36f710476c306ab7431d7af082c093b82ca81d6797ab0e9e868. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:52:36Z), 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/QZNWW2554889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8367914be47ee1ff533255d3112b294da82794373177f7f8de86e226b57a003c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:19:20Z), 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/QZNWW2554890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3dcc343d4e93ae181a2e365fd553272a0a794ac79dbaa1087e9ce38fd796df. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:24:38Z), 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/QZWFH2591961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455cbe7ea66a01da898129a7d039c4d2a5aa72698e122e05cb24d299f40abc88. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ772536161.