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 0xa8a1d4c99ae75e6493b8c9e63737a2b86fe4caa9be819a41e86a748c5a72153d. 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/e6eaf40e-a32e-4c68-9552-fa3eab832dfb.json and https://artists.proofprofile.net/proofs/artist/e6eaf40e-a32e-4c68-9552-fa3eab832dfb.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 0x5d087bcb6321819908e2e455dc755fffb6659a3f23d02b1193946f7b3c0c1ba7. 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/QZJG52342869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef0dbe0e878ec442b939c7c280af912379de649dcccf3836c8ba746c6a8eb08. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/GBMA22376497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745a199a16f965d97ac91c9a98b47971b11a69f7a5e294a11bec95fc177ff0e6. 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/GXF9Q2575290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431f33b40331c9f78e1a75f778f399f5609debb2b30f5e7dd4aeeec224d552d3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ32580433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102ff1648ac88061da8aa9d1e16f9a00e8ba3d0c5bfbcb2ea65f0fe5c856cfed. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/UKXN22530338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3764daa35d641e8db3b5ea6586699c282bb070cee56bc1e097926b66e51ff6a9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX3Q92537952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51d352470e6a821eec628a5871ab76ab3c4c950b56a7ecd00cb35dbfc6bcfa6. 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/GX3Q92537953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb862e9073edd9dc9927f3543d1ca4eacb23c8315de6bac63cb31e5b5e7a4e735. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GX3Q92537954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f3f8b9f8a609e12b541ca13fcd59807e03d068c262876cc8a7906c2b7ed9a1. 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/GBLFP2591695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabca922f817ffc6bf20bac523c305ecf8cc10c0e2fd5cb27e5dc18b2d00f5cd. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:31Z), 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/GBLFP2591696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4233369064589f03e99152c367d813302d9c020215013ef197f95949d86930c4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GBLFP2591697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fa9b38829d49dd9d49f31859f13077ef2bf5bd7514c4de0041eded63a72ddc. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBLFP2591698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cbf6eef14da6a856bf3d9eead0f397959313e5221860768e80f081e76f4e9b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:24:46Z), 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/GBMA22599963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec1e7750d0551c1448391164b55c96f10fc82aee5ed251979c3f4c1a537f3a5. 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/GX53U2613941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35125d8ec56fd284d9504722edcdfc80647a2b4ccdd41f2a68d6169bf94cb72. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX53U2583310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93aedca3a1886863ff89fc85ee82766c63e840524d3873dafc3380685ab41d6. 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/GX53U2613942.