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 0xadc90bbecdd421abcf1a88211d9534dc52358263693cc16ac52303b966b61697. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b94008f-77d8-49f7-b7e6-c35b56bbfa63.json and https://artists.proofprofile.net/proofs/artist/5b94008f-77d8-49f7-b7e6-c35b56bbfa63.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 0x44dd4693c8b5f1647a09692a8b34bf3ef6aad99c4829a318397b51c3fd745900. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZMWW2338696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9524d8f2013e107817644767b7fc9b3fd5646aa1a98db8b15f3868b196713954. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAY2356809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e154b4927fbdb4a6a886345e2c2f7902e4cf60f28b352e35b54b5b7bee016ac. 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/QZFYY2456658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf35311b7ae2174c5a6de146eda11244843d8d3182278bedd0d75f98088a606. 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/QZDA82403534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb3e222d2b0f4f885441a4eb060088bddfa8989a7b2f14f7824349e090c1bce. 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/QZMWW2425735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513819ad1fe0d7dbd92f60b47b369f32952b9e6f9514594d041bc32134c9d295. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWW2418160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cad07352f3c0f3dd53956c14a40878e1cc57106164bd7d6b2a135508437ad6f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:34:30Z), 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/QZNWW2418162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2512d58735a71aa078150e48dcd8fa205154209dfd6cc4f69514609f3729b5. 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/USLD91761619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342ebd0a0a2c61d98c4fd72117e4b054343d8bc9754cf0f25d356123fa77e10d. 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/USLD91763891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372881f9eb8905a878b4634f1d0260e6a5de7de765481881d7fa094ab7fe21c9. 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/USLD91764070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfed61faed8921902351ac42fc08caf09f4797e8a139df5d83b00b6b45dbefed. 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/USLD91765274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcabade39a2f0d4762eb4f87c2a52d49715e4fa6a554f43f858e024b99d6eca. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USLD91766747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f4a676926189c9918adf9a659609e71dfc63e733cae0187087b63c42ca3f9d. 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/USLD91766752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae972ad5440eb741dd1d412c5e170618dcebe7339f415c998acd3800c298bd7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/USLD91766753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82265e928a2fda449cd8ece513d303d17bf0816d581f1ea6cc382ab09a83e7bf. 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/USLD91777325.