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 0x5577d15a30f92aadf9b887b2e88cee20ed9d01f98116d942a2983475b2451fe3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e9d8e4e-9416-4ec2-a9bf-090c931538a0.json and https://artists.proofprofile.net/proofs/artist/1e9d8e4e-9416-4ec2-a9bf-090c931538a0.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 0x9977e3e86db1575d7c923258564d56bf1a7625ef976152fef7dfad275ff7696a. 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/GB96Z1100882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda4028f30829e08268828f92eddc1500ba447fa008b277e6f8aedc831fa9625. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GB96Z1100883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76b8431d28abbc6282689165f4449aee73834d7a20eb08b50abc1d8f0b88ea3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:58Z), 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/GB96Z1100884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2594ea419faafb55ffb2b81136da6728bf0fd536dccbebdc5c45066837a4f339. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:48Z), 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/GB96Z1100886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5e70ab42e5025f4974a2ff3ce1c6c207280f5d0cb06e5bcb4a36d6b87bf27e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:02:18Z), 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/GB96Z1190050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44fd6db220ff0b1f1c3c3b527cbfa3a4dc276004c5e9f49bc5058d88ab4a4e4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GB96Z1190053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d7e61aecc82ad07efdbaad741afa6e076bb875983ca93dbc1c0491fdbc0a5b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:33:36Z), 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/GB96Z1190056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575f8fb163d70e76e894269e9caf41e43f6403ef136adb8a3853334053de0a55. 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/GB96Z1190057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f7950c5127aa4b28c47b8bb9bfffde8c3d2f2cdcb0c5c0a8cbe057f3cc9522. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/GB96Z1190058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012fc08adc0dedc7e3e17bf1dff356071026f0146f92d11a1b9a475febbbf1db. 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/GB96Z1190059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf632bc05c57ecb56384a176a71d0d66ac89eb7ca84aed070f14317b0997cd4b3. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/GB96Z1190061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147fb396f4245db3a869dfc3be71c3bad89457a15ebe9627ea678f1b70b94f0a. 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/GB96Z1100988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef6e56d6d96738841ece46cfd12e18fb5f6038311119ac2ba201ee5bb65c3e8. 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/GB96Z1100989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a7d03ad795bb0e626c324242ebda8534636b290fffb154a063e30435d1d2f7. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/GB96Z1100991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b18ec1c6d4c51829fda24434b88c534046704c128662e951d6f986f68c7fd4. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:03:24Z), 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/GB96Z1100993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5edd8618041489b049966ed114c63946d1817771a57b2591549751443e0730. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GB96Z1100994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8868d0639137766984bddeeb2134a0666585c6d391f4ae4bd65052c217167c0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:35:45Z), 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/GB96Z1100996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ee1e5d06792f3be4dfa60de07a5a25ec7cfbe471fe7439fb94c54fdc0d8b5c. 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/GB96Z1100876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff6d5e7870c00e773fd0cf21becb61c9de7a9e6d606de7a29139ef7f45e136f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:15:43Z), 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/GB96Z1100877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e3071b04051fecae61ae6c67e6dd21d18b66aa86c91a6b7005340658d4d542. 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/GB96Z1100879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2cfbc7fb6c6547cda762557aad370f0857807b3f3150f4e6a80e3e53f3feab. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GB96Z1100880.