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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8afed961ab2f46209ebf7dc0e9f07c58dc388681b7e61764277353d251281c. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94984fa3-4681-43c1-a652-68bafb9e39cc.json and https://artists.proofprofile.net/proofs/artist/94984fa3-4681-43c1-a652-68bafb9e39cc.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd07ddedc405acdc9287d607d46415e3959e06db46c92240b17b72efac4f61bd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FIYJP2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3580b53fd4d81d9c9fe3ecb5ea675a23d575cbd61fc994fc51d74b58406bd3e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FIYJP2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc486d9b78c3357d8f551ec9d305345219b47448bbe02d80453a13f4fd0d5139f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FIYJP2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfc7196db57f7483d25544acf23ef24d71ea6539527811a728043df721926e2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ32246564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab59479c37ad56224d393e178ca46a56b9d6fca2e416aac040d792f826095217. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ32246574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f950df648e6453d71393e142f4f61861d1862deca510b393e5458e0d09f2338. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM2PV1846525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1334f9778bf4e5a7b5047304c1565530bc4c486d89bc450b0812a41f3a2e84d. 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/QM2PV1850366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bee7cfb69ff192ce8c1433f0fbed7710c91426f26cf5f46433fcf69dc2af4f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM2PV1850367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40cbbf75695bca61460da219ac9ec163887a64dca8a89fa56196ec22cad9ce3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM2PV1850368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18eb970aff9e45f27f6a43cfc054523ae5c3dab20820eaaa587ece1e03a1c809. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM2PV1850369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec6efab15a829dc65e03a477c4c07d333f6f057b44d5a195f6a7e9a7859f16e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM2PV1850370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e97c06ac1770703410a61aa8c6b03a93d7a07d9897aec335c4d8d29a8aaa24. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QM2PV1850371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c711587afd457f64e21e21ca36a59c9a9e5538bdee35de2232df5b2477096c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM2PV1850372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45039255d75990ebc5796810f035dbe12299fab5727c50d9cd50f9fa8ea009fd. 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/QM2PV1850373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6566eb1655bca75741b2a317b9146fa4ad67bd46b979504202d0f9f5467f72ec. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QM2PV1850374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb660cc012a35c55030b09d7e06ec20f3ca9341669532b77a66ae39b4f1feb167. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QM2PV1850375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d69849484310c65a05d2f566e2a9478a609ae7bd5854a2958981bbcdc4453f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QM2PV1850376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c669e6aea022e7a98dab3928e2d510473807b2e0b3305bd4219fb82cceded6a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM2PV1850377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0afa9fa47985f38cf427bf8daf0b17867b5f523db25534e067c60e017694ed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM2PV1850378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d57720d4671c24cab6111f5d759e6963a3a9f7682456efe65addab424a58a0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QM2PV1850379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c711587afd457f64e21e21ca36a59c9a9e5538bdee35de2232df5b2477096c. 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/QM2PV1850372.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fbf0121b50d38d3326537520b47d81e19a02d4c822b7729c941b07b5e9450b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DES560896306.