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 0xc15fade1b0e33ff82293f32212f767f7a8b3889eb004449d2b4d40a8d55263d2. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/891a617f-429b-4a14-9d30-6a6e95b99cda.json and https://artists.proofprofile.net/proofs/artist/891a617f-429b-4a14-9d30-6a6e95b99cda.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 0xcb381c4a2bd6ea639b21999b6a986c03c142f18337e7f202d7f91e995a80e475. 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/QZNMU2110375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71e8a09117a5479b6077a3eff8e9e5615c8d64bc338ef4df6132a006218d3ce. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:44:58Z), 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/QZMEV2232611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf21141549bf694a736d3612b0a6606b28e99a6f01854d15cc15898b647acd29. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEV2232614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc00875917f519cacc7d400e51897538bfd94d231ef59fdcfc08c698d744030b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZMEV2232615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d7dfb7d60c98bfa65c72c951ac790fae8b7e5c46c4bf31ba15b1d9d9b61a34. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:48:21Z), 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/QZMEV2228709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc069b885adc23c90f168f64fa802db317367c772600d75182a3f20454af03aa3. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZNMV2288217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218e0dc99635733b47f62bc7f4fe048ff04f494356e2827ad716d83325af110d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMUQW2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0a28e5f53280a9d437d221717693afb5b196f8a8eb52de3adb82f1bfb246a4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMUQW2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499b3104853a141582f8f6df30d538f6b65a20390c72275d867e2009304c28b6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:33Z), 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/QMUQW2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5b542f957e69b3f3e790fea7ecfaeb4faaa44d3028394b7836b16b3d94adaf. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QMUQW2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac9305f76f52f75be72bfe0f082dfbf1d7a42b8667d61e8121d69e1f2543c4f. 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/QMUQW2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa265f0e2af495a209758363edc7254ce4650f1f839fef23d39225907bca230bd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMUQW2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd621fd15b8b4d20173df1a688a4750d12ea71ac6da6fc476c32c77ddf8d9e914. 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/QZJG52359374.