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 0x81c009452c8fd56c7423f92046cfdca85f092e24e4a24bdfa1aae01d6170b6f3. 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/0169f250-976e-48db-8a84-45239c76303d.json and https://artists.proofprofile.net/proofs/artist/0169f250-976e-48db-8a84-45239c76303d.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 0xe5c49566d85fe3f1da2948a5eecfcebec0380391c933d03df7a1c5c3528a1cc0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QT3F22406088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9a8cbe842474e407f2879a2d997f5d9712491c129beb13de7169080b897617. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QT3F22441072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c38ec5bdc8d41587553031b796cf9ac46f444069ba121d19a3fecdc2d03910. 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/QT3F22465388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c649ca12845b0db4de67bb88e4fe1e290f36d6d3160d5e1ebec632f527182e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3F32420714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dd150c4fddec8c24589d744a4e6ef6e101a323f7d651880c88dcdc5217e2e7. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZFZ62552676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9c0f57342563cbdafd05337e2da6ea6aa7e8ac480c46354207c437788207f5. 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/QT3EZ2441535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297e02d543ee6623ea8b4ea246da1a71ca8f8e3a4f39c10605b876c3ccfb6ec3. 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/QT3EY2478303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99702858b40a9395423fbb515cc306dd7d677a14d188bed0b0cd49806c71dbe0. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QT3EZ2441533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e750a2898a09e3547bccd62a75ed556787fd0524c6a4710dbabac6158eafbf. 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/QT3EZ2454341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a795e01fd9c6b4f1fb4e569b01c93ee0e795fa4c0afdbcaacd8b911c174b85. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZFYY2549565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6673c9280e6130341e76449b01a003f4c5e9dad54512774115324130871eed78. 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/QZFYX2544487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceedb4a7be1917b1f9512f7b8c3788ebef4aee1c7bcf0a6bb49b9807ab1a9d72. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES62594500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce83f914789b3b28b7c8e5e3d5063ba7e87c2611acf8040607a6ae19642a748. 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/QZES92586132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0219166804f507ec777e95fb90bda94d0e8a25a85d297c6327dbaf0202aafd. 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/QZK6N2520489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828933d80a742653d8b6cf4ba9cf0678ca292855de9440c47f1bbdc5fa34a460. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:56:05Z), 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/QZNWV2598842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa336800c2ba38e046d070f87269cf74d8d1ab9523fdc340266186eae41fff637. 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/QZTB92574193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3748c809e24d943788ad055eeb33cea8f37d1dbdd65d26f5fdcfc4b5c05bc4ec. 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/QZZ7X2518211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67c5a2f219f8f307645cbf0f5424a59d3c34ada1b006332db1ecba481889c18. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7W2552226.