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 0x1e2111ed80d60864a496a0f89d8dbe5ff6f41034e1498585a399635a6bcf129a. 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/589ac7b9-31eb-4444-82c7-ef771db62318.json and https://artists.proofprofile.net/proofs/artist/589ac7b9-31eb-4444-82c7-ef771db62318.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 0x12d2eb3f3e514712f75c83d8faa91b2f5746154b70b6368120921495a5bbdf87. 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/QMEU31406367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08e1dc21de6bb1f0da870c03528e7316636c86d3f784fd494e96e8b3f26921e. 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/QMEU31606372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd9d024035c912279fbf98598575f72f01383c63da94e7333f41b0c7edf6d29. 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/QMEU31406371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd67ebb17287da3e6ab50789d5755772f2fd2c8500cae5ba1b99f142352690b3. 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/QMEU31606373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a449cec4449d485a2e1ba2046431afed5004d2275ae521abd9b810dc807719b. 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/QMEU31606374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0492337eed932ac8512f9632049b005e909ff969ec8ecace47317bd9c29584. 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/QMEU31606375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5282d2e8fe648d8868a4dae65972250a715e132470b0d6d39800f60a628d193d. 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/QMRSZ1901589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af3f299c438317ba46c61776b86797a9edb5e0d2ae036205decd652218dd5a9. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:26:44Z), 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/QM6P41937138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecdbe4665277a17577f08a04e0d2b55adc986fd136da8ad74784aae3bda755a. 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/QM6P41937053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ff2225fab81ffa2982c760098b3201f22b8e094afde033b4671f0fef2d7601. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QM6P41937139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905abeff09c198be51d1099ee81feefd7bcb68d09265ceb9cba9c2d9c239e7b2. 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/QM6P41937074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e6aecdca54a33b38b55f51db919d4ec024899deb4e3260e2b93b808d835204. 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/USLZJ2011517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a743ba592a76cd9ac68fb9eb24a0328f8761811c643f894a2ed0cfa60a22e2. 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/QM4TW2015076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43fe85d117e38d1e41fa8965b3eb65141220c6b76cfd593fa0dac84675a5e58. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBWUL2062298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410bdf23b1fdd252ec24f6e4f1eff4f16aa6a6b0e7c7d9536e84e4f0886ed9c0. 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/QZ5FN2040303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858650d5102fccf395c60813c930b21588274af9efae252687d80ae4d3245bb2. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USLZJ2150817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3250481b53281b43aa1cf68b3aa24c91cedb5d917f9e7931965e1b22155000fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USM1C2200022.