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 0x33d8f7735270a0dd82789287ae95f79e0cdcdb23fcc41cd47f8505ea5a9b071d. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17b56b74-2f54-48de-98d8-b3cc40e45f6b.json and https://artists.proofprofile.net/proofs/artist/17b56b74-2f54-48de-98d8-b3cc40e45f6b.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 0x847a946c364b6e02eb912e57d05c1b8407ab84b7d3e465ff91a62bfc9bd80219. 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/QZWFW2541318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab163c1ae4a0a9db5c77ab651704339dfa2724b09844f9040fb31d136f3b49cf. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFW2541312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2134a87161c101450fc928b119ff9fdd3ec78482ecbbb4bbb5d071635cfcf143. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWFW2541314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aadbda48725cfbb8fbd8abc413caf660cf0394373c5ba19731fe6d6ed3963b. 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/QZWFW2541323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87154c369a86371053f8d539d59a30c79266759778885a320c70076507e2a298. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:04:04Z), 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/QZZ7Q2596319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859fc182a3b1e853310aff139e3f9b58c3caf53472c1e69bd73b88d829664110. 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/QZZ7S2555771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f538d176d57620babfc05468ee597282068f12a0f6ed282c7564f17fc111d9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7S2555786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f32892e4004185da79aa34d071c8e2d8c20257da380048ef9f6981cbe7d86d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7S2553673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e12d2d4749ea2108c56c1595f00cd29dc8bab22f1ed233b4f7eaa543c592b11. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZZ7U2544066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a10b09893ac90823188a21dae0a19552c33703dd509d38d85e3e1964f3dad65. 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/QZZ7U2547140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197d39ed17ae07e251672d97c097d99a8580fa97a2d3a6b06331e83d632da965. 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/QZZ7U2515200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3031812e7b478645e08b0bd6b945d9abe35f60e0fd5f41a29bb9fc08db326c8. 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/QT3EX2538541.