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 0x6d81a3a05ba82e52230c43ece1ca13cd1ccd49f21aa07a0594f44238cdb4cb68. 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/a9341993-be4e-4b9b-a73b-cfc77aa57a70.json and https://artists.proofprofile.net/proofs/artist/a9341993-be4e-4b9b-a73b-cfc77aa57a70.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 0x0e2bb891ab4287bdf0a6676d55c5f166495aa7f71274af6fe04eaa51e85a99cb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRS182168019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eb95e101ee714eaf25bf637681db2f4a1ae3e37b2a7c7df7e2196589ef93ee. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732290576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eb95e101ee714eaf25bf637681db2f4a1ae3e37b2a7c7df7e2196589ef93ee. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/HKG732290576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ddfb8b6151ce1a805ea7454d01378102a69d2fb8903b0dcb42f7fa51b46df0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKE022243002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6a1aa2008a80c747ba518921df2b149c82801eaf10f6d0a765d14ea358e678. 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/HKE022243005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02ea68cca119a7cba9b07b04143e22c6443cebc9725df2348c890d4954a8739. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWCC31902217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edc04f52d54f2dc2465fb2069633f6dd0b76465215972161ffbdbe343a536af. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TWCC31902227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a991449b1a91f0d1bc3c993b6f9ab1b0aeba30afdd88dff80b3a5ee8c16adfb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWCC31902229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f3f3a8e487b76b03cc995a08e5bae0101b06448b35cd359c52f9a778551956. 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/TWCC31902230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16d8a490a5834bf74765216ecad7e6f23ff07b8d41fbfe2baac1b195a3ae225. 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/TWCC31902233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e827186a7d83f86f63d1da519dfb2263ef070a8f835645cb14b921e758cdacd. 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/TWCC31902234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08138d421bb788a2877af1f2ad66beecd564bca341db4f28e909b2da0430e5e7. 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/TWCC31902235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332618ff4d2804bd908a186169dd95850d58bdfe6efcda180af967925bd40aed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWCC31902237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2fe09aca82429131e4a6b943bdd1242b7d6f4bb55a96a6bba7c9c227e09385. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732290562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86261b6c121791b1724b4e42a442a2633696be73e185d2c0ecbcf88069f2172f. 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/HKG732263464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967619f0e709c96517831f199e4ffd4b6466866752b68c53b335cc050ee28728. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ972319592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3ceb82b96393d9f5ee134f4e9fe9be4842db3a04615ad8f9c35fa0db2d61ab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ972328679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae6dc75695b2c310da601e9c1443d00c5ebd58afc42d695e63f252402bb7819. 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/HKG732149089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5010e2222e5a94769033fa8137c1cdf5aa10609e3b7735191cabd571f614aeaf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG731721891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4bef7a331b193e1f7ef597da117c347d71ee38fc5e256040f33dca6aeffb06. 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/HKG731721889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7783b57f2d20758adccba5f372fb836908cdabee552afa5cc87be50d4899ba6. 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/HKG731766684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c22ce0c9c769c0c2375c256c0faa88cffc2e9ba7ed0231cd694638fa538b3a6. 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/HKG732229502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da929a1fa79d6592cd5f98e65b842a442bf48e382d62ae4153c008b7acee083. 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/HKG732244398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e086d8a4244599328954aba32d560c0056316e53ff197a64ce6091435c8b8ac. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732244396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3210db2c2cc7bb4cd6a40b8cd7d9cbf9afff5a923989189e1f628d460132632d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732252441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e71b687cf6b34e60c274ba513923551c789f3359267ef90e86a484b36d7cfd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732252439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822a4b525559ad652891950a61fdc7f790010a013a13d4399b87dbc0e888562a. 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/TWCC31901955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe198446c21e1ccc5556a4c4af0ee46afba1d8529a92be0d6c59d9fb47d777d5d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWCC31901957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f604acd092d2e069ed632fe22a68dc635db53451e9f760e1aefc4b0bcc75ac. 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/TWCC31901958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1d62578e632625f76934a54872b0ec90660e8f10c6d6482435d1c61e4f2964. 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/TWCC31901960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f7d664356f1425822aaf6336b2dbb5c175a84f3b3615533c627fb6f9cf5fa0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWCC31901961.