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 0xa502d9d63754b6e2ddb8a9e7ead31ec3063bae61384a0eed6b480179517ff985. 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/df4b9c88-6507-4aba-ad62-2dd89600aaab.json and https://artists.proofprofile.net/proofs/artist/df4b9c88-6507-4aba-ad62-2dd89600aaab.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 0x650fa6dc423acd168df22a9893f35ab4ef89fe9df477dad5732c565a7a7b2531. 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/QMVRR1401213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bb7ac7e9c9da5d5e48f34bb4b6d6e151092b79736568497883f9572253d541. 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/QMVRR1302752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eab20a6bd7c27c1f6bb115635e17f8ad5f03773c43ea18f2358064951cf5db. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QMVRR1400765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa007537e55dbb2adbe53912bb10cdc85dec011564919f89f983d2789f5e2beba. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMVRR1401022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873556fbbf216903af9e49d78d44972ef7343195b560cbba00b884988318d474. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QMVRR1401620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1deb23103075051dc559de0277afa186b00c2810c4f412d1b99c20806c03d8. 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/QMVRR1401344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a6dd16deab4b2bf2a1ed2c4646f2c54061d4e4a5325a956c00f0bfff9ea9c0. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QMVRR1401421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc5531bfc18512dc45c97f30ebdc14c4f8544146211166ce0b35e74ce6bb0ab. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QMVRR1501602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4509aee831b1867aea8529c403e0ccaf8f1f41902aa7753fd783ec0f25d9005d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T11:05:33Z), 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/QMVRR1500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2922175b3c256995fdeccb744d28a19bf76672ee984d5b4cb584b7c33923f6c4. 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/QMVRR1501073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc8702c30bd42746bd0f5dbc62f65885faa32fcbc72aef5df3d01f39e6c9c5c. 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/QMVRR1501295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b980da8299d3dbf409ba710b74c3bf1887d85f765aa5414cc250512de458053. 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/QMVRR1402986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1412290e985a504d60ba45e4fc9021e0a92fa58345bbc02eb8081f5144ef736. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QMVRR1501384.