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 0xcdfbf3ace5ba5c693ee706578b0307b67eb09da66b5d84806d07fee7ed07ce1b. 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/4dbf17f6-b57e-4ebe-9386-fdb6a701d1b0.json and https://artists.proofprofile.net/proofs/artist/4dbf17f6-b57e-4ebe-9386-fdb6a701d1b0.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 0x6c7890b58ac3499ed1e2b927d3d9106ab7034c056dadac866268c6d25c1a166f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TR0240600278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b511112f10b37d972de76d20e9dd8642952a8f402f17ea29344ec663f67b9a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:08Z), 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/TR0240600283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eadc29b4e91da37c579c6e3b840a45f44515a8ef0d8a0796a8a82c73356e29f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TR0240600274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b8d0b76ecc06448db66e0ea52eff572b684caf046df235c00437b04c2e6466. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TR0240600271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2e08279e01537931ebf03a7057fcef17ebcf7466d4f447a68798d407502e62. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TR0240600247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608f64e48ecfde0066f3cd02d5d655f893c536a0580864f72160aa9f8dd749a7. 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/TR0240600255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a372e0a91bfb08a5631e0364df3813cce485cd09dd144a197a0933553fd65aa. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TR0240600249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdab4cb0115bb9aebda84d1225076f2554a2ff8ebc9e2c4aa54a4b8887467dc0. 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/TR0240600246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eae1dbd039965833d4586605a97b0a33a469cdd1dc8112766580b403b83be0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TR0240600227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663f5b9774b9e415bb228d3af549fae8c1ada7eb1bd0f239bbeef61b4b3d0e41. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR0240600235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf837d66ab42e2365ce4e7d20175663d36df958cf67d716283081bee7016cbc1b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TRAKF1613747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894ebae8e044f5b608cb4c4bc12e5d88c04ac1befffbe3fa5cd50c5261d3a0bf. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:16:37Z), 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/TR1780801055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c49f53a5236cd47a918114485c6743b46cd2a0a5463b9ca5d3fbdb588b4252. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR2X42167187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72c0c2254b8ff8621d0c2152bf3b76d27377341c878e70f0469aec9ae10dea5. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TR0242400057.