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 0x0241b2825ea232ca942747e82c18c5d649836f7a1632b573cdcf78df303715ae. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c10eb3d-e382-4395-8756-8150a46c8b8c.json and https://artists.proofprofile.net/proofs/artist/0c10eb3d-e382-4395-8756-8150a46c8b8c.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 0xe4829f4f749578fbdbd1f402e841f2b624e5982031e4f25cd20d829628e08ee9. 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/QZNJX2483991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6778a3505953d8d973cfca67dc4e64e4c8a410837139f1fe4c3c7336efd5bf8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:18:36Z), 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/QZNJZ2490203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe312771495b662b79b55acc54291781a746f90432807047a23cf20aaaf602e4. 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/QZTPX2469815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7f044d048b33d7c9296648e4db9724596208a9f1b0605ff9e5e18c3be41014. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTPX2467563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352634edff2fbfdcd2ab1319cf9f865b3b8dee02a2d6f47b48087e67f2656616. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:36:31Z), 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/QZTPX2490053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f01f5cb079bfee63e0c8bd3f29330bc2e9b6ef02c630199017a3d621458b14. 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/QZTVM2489359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959adeb2be6ed10103082284afc782e452133668584b4b5d9c1e28791ab82030. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:08Z), 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/QZW9K2471142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ac17a29eff1c40b600525793c1a181fe37a3a6a0ea25774afc299803673e08. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZW9M2446527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ba331bbef49f7cca35bf6b83776a9f9d93b87768fa537d334e1a42f412b1b4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZW9M2468001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ce13a03f447aafb762c962f065f12546c3ccdf7d101968212edce9d3ff82a9. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:24:04Z), 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/QZGLM2504789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ea14297ebbf9520640b54d085a3d3fc71d6516397327adfe3d11fe764a03ec. 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/QZGLS2552366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8eb91c0ad7464131eb03dbd6ea1ae4f3d5ba5bd8af19377728e82a0a4f788ce. 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/QZMZ92529649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9175501b139cf0cb2fe84dcda633fdeea1bdd508ec31c67b942d6cf17bf177c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:48:51Z), 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/QZNJV2511798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9ac1de3a5e5e6b021857908b62a1f455fed8cf0dea33c67433e9d0a39e3809. 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/QZNJW2565128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b579e4a2552970b91b6e79beb7bede9801d337a694f79440e0c232acb141a0. 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/QZNJW2552957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeceee7178a4ce162fbf2cc82aecc5a0997f39e5e89c9312896d60888ec63390. 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/QZNJW2589258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a3d6ded9b7929b9679cd5c89d2416e6dd6b67fe9f18bce565c5a2c7360e5cd. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:51:44Z), 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/QZNJX2546061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e78f219abefcb88f3c28d7a135c7e98d81d852f05d87da2220723f94a80f2c. 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/QZNJX2596232.