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 0xdd4ff55b4387c357f9cc5205803d917cbcabeaa5a27d9890cbf627431ecfe061. 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/56019448-7e65-4d18-bf27-d1db0c84f5e5.json and https://artists.proofprofile.net/proofs/artist/56019448-7e65-4d18-bf27-d1db0c84f5e5.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 0x510cd2dd8ff56882e27a89d14a353b8adcb33940da6527d36516a884c533208b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEDN81800902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac7ade6f602f184af0a5cb58abb213ae02f42787a271567ec89c15ed1258e3a. 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/DEAL30700457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3b0c039d9f12085003c0a66274ff1a4f2a6d393ecdadbe9999c139d22b2d47. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/DEBL61305669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f1195828bd32e69c9aa97a377cf866af22db5fec9bd6e6b47f713b3c0e0a45. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/DEBL61305676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d901121008acb1686eb9cd395b596da3241bd35c42e86deac9b25fccb2113d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEAL30800868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf525a7f6f4fa157713649bed234980aa7eeee87bb75bbba978dfddfeea54a538. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/DEAL30801267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b12dc5fdb239fedd553be3f3d1482eda9a0b213635b539c6b8a1a828654576. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/DEAL30801269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e7fb5a63ffef22a3b7f03c9af4c8713a19d37121f98e2b915eb9edecdc6326. 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/DEAL30801273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c534781b37178b8a52e9f02b87acb74cd143ec60b484369e9ba628cc01526aa. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/DEAL30801280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40b4d0b2edc1d264a0a214c1e6476777c1b5dcf04699d996320d0ee119d12ff. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DEAL31500505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9d4f29111ebda07161e88ff4e4f08baf6d6b189b87fd0756628262489887e2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEDN82000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7564ca97cbce6b5da6c8a59b1c335f2076ea3d0dc931af703032f4a031bba1f9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEDN82500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5430f4691954ffdd84893c6a418605f4f78a619efc46bb7105d404af33eac7ab. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEDN82500502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe626db638b01e61895f78aeef0f6df8d1afc21eaca491b15588d876ced23fa64. 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/DEDN82500512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6513a0c8cd8ea7fb035e647160780ee47a081ccfb2917c8d5c01d12d1d62da0. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/DEDN82500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f143cb91103ab0c40bd051d6a37c8531f2501462de7c852a25a8ce544bec919. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DEDN82500508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe626db638b01e61895f78aeef0f6df8d1afc21eaca491b15588d876ced23fa64. 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/DEDN82500512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f143cb91103ab0c40bd051d6a37c8531f2501462de7c852a25a8ce544bec919. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEDN82500508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6513a0c8cd8ea7fb035e647160780ee47a081ccfb2917c8d5c01d12d1d62da0. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DEDN82500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5430f4691954ffdd84893c6a418605f4f78a619efc46bb7105d404af33eac7ab. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DEDN82500502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f143cb91103ab0c40bd051d6a37c8531f2501462de7c852a25a8ce544bec919. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DEDN82500508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9823aa03829197e7995aa1bdce893b3d63d82829cbbd20b1a9c90b310039e6a9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEDN82500504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cca525123151edd5eac40805acfe807acdd8067b2bdfc1dbf82cdf889c4fe8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEDN82500506.