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 0x3a023a1a8fe0bef0420a219a5cf0acfbcaf71e0e79cc972a34bde8fe9e86e34f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/765783aa-0e88-4baf-a711-0903946cb915.json and https://artists.proofprofile.net/proofs/artist/765783aa-0e88-4baf-a711-0903946cb915.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 0xd21ccd0dbe6b76db59f9bfd407fc3d88229d2b34eb3da4ab108c78221ac45839. 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/QZK6P2034341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb412c3270b588c05342639101d02e51cfe2395d62e2492d64094a23236b3163. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWR2066855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaa79390595b8296bd55a8861a9762a76f43bf4a0a18ea2c8dee1cf5e72929c. 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/QZHNA2198730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a90800ebddb57ded251d8b366834649443afab17d4d446c763f5de0cb2ffca. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:08:11Z), 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/QZS642383560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2297e0761fb806debf78acbab8a7168bd6ac415d473ddb15613ddd5ad62f397c. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZS632414770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ac81369a5a71423f78c9eae79859ca5f24092ef89d086612f0cf2525d4d5f2. 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/QZMHN2480616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb469f7cecd32e16a4b975117b55e89835900619c09fe41f878388649f8db21f0. 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/QZS632509854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45499e7556e9158fc28d6c84764312de88399b94e7561b731aab85a3032d503e. 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/QZMHL2545398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73724c5a564fad24c83088eaf3c4505e1a9b3dfc40fa9ec5d1fa196d3a790d50. 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/QZMHP2559934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d89e1feddce2b3089aa3402faa43697d3adfe9791d6f01c5b6c8b5f7877bd56. 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/QZS642536609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed7f17424a60003ad6e61649060b639554708dfd323d5d00815ca0d48897a7d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZS652476185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ac81369a5a71423f78c9eae79859ca5f24092ef89d086612f0cf2525d4d5f2. 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/QZMHN2480616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dff656c0df3837ca03f3dd0ab22ba60e5b24d8ca84293d0792e4f15c86e4ff4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMHP2586302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774a7ca91c75db8a13d1838077ea8e7ac05a2e2df4c4d16cd82b09e6019c5b92. 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/QZMHM2560613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd115b314dd1a03f4e7a2053857ccf456aaae6560fa83888b4b332f2e1823db52. 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/QZMHK2564159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaa79390595b8296bd55a8861a9762a76f43bf4a0a18ea2c8dee1cf5e72929c. 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/QZHNA2198730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83159f3b749a7d4f608984eac4f90ed56f2bcd3159d18aebd7fcf0559be8e10b. 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/QZMHL2577986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2cb1a1bf4ee0e14de3d52e617f95e3342caaa44bc9440705458ebcb5513a21. 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/QZMHK2501477.