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 0x6941655aa201cf82627e718a68932c6e29c216e576481855ae8574c2a5b0dd54. 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/3a1afcef-1906-481a-877b-946e66a6e162.json and https://artists.proofprofile.net/proofs/artist/3a1afcef-1906-481a-877b-946e66a6e162.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 0x2be26b16441cdcced4e78100c3841af0b98b8619bc1c385ff718c6df5d0b1ca7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QM6P41944782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994b0ff811bc1e5389e8432998cab7d42c657a264b2fbbc8d0b69c7958ee22c8. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QM6P41945027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefc3413429144194fd24f2c633dc1cc2e4bf7bb2d42a85cc6abe4ab1f023485. 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/QM4TW2041203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c7b7b7776cb8e2fb263b9f8e2d738bae01eb4d407153d20d793b4c36d70192. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:58:57Z), 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/QMBZ92051513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880b66758d5e5ca335138383246d1a05f71b96d3d1ad2dd755955f1694058f50. 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/SE6XX2127729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb27c81f7df2eff6b7ec087c678ce6048cb39c965e88abd8f57dd2b494f72fa4. 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/SE62M2150120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53287ced0a2bd198d3473eb8ee678a2aae24d7ff47c46fc56db191eea25a0605. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QM6N22111532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320e4ca23f6a8594c704af05a6dbfd943aac43b89accd3e06de93d0c2b2e0aec. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:58Z), 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/SE5BU2245253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb38a0efca8e3370025a5c4427e68bc8c95417191420a34d18d96c8f732e9f5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:57:48Z), 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/SE6HN2276956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579a03b5672d8aad0c9773f35bf370b92cb81a631debb7f0a0f123e9f5018b37. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SE6SA2293208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0010bebf64d6584fcb813669857bbee9e1dc059094d7c664ad266e1db1db9d4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE6XX2270123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab7981ed2148d3457724d8ef6f77fa1fe3b5b2716584388fab8c128f5f02bfa. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:05Z), 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/SE5BU2395169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17252da8085a14508f0171fd0a807664ab24eb7b0569f4f7ea9378592b3d2fb0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE6I32477302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1aa1418e68e71504429fe77913b97b53d50744268a0bcf41d6b858dbe530f1e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE6I32448810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0781b8d8085584360fb845935deb776a3a18b415f74db1128ec89a3f8d32f837. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/SE5BU2570594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15cdc8a2ebdd945aebfb90417701c7150fe02fa36474bb1da8d33d281e21020. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/SE6XY2595130.