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 0xf83d18291655f731ffd9bda93f302f182679c4437b88e275e29aa9e3d3348fa6. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/503e30c0-79ec-4a94-8322-19c7bfb23220.json and https://artists.proofprofile.net/proofs/artist/503e30c0-79ec-4a94-8322-19c7bfb23220.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 0x6041eb2891262c072f7a3811e5ce068dc6e62ee3680a67c6fe13de14c81f7820. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH7812233241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75187906dd5710fe727fa6ea7a5e819261d66d7910297c4c1ed1fc9120afc781. 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/CHA311200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0dfe64771dd541fce89547358f5bc1c29b2b4a34eb06ef7d2076911490adf6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CH0011000230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8308e3f5dd18d71a36954f1b814811f5242fc0af5171e65a7894006a7678d27. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CH7812415478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06a1dac9b8d29d0160c620c140876d7def8ac8c373a08225e4939d6ff875b80. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH7812410066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da10cd58d6a2ef3b98dce05b56246e64ebdfd646491df7d797b8db306345d79. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH7812404641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a602c2adeeddde95471a8938e5813600336248c404216ea463028cef0679f42. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CH7812369920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d4426d049297bea40985417e8f603d78ddb1f0fd421df1ebd7ab88923df05d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH7812344335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8325e2acf1698f218c601522a51d7cd8a3882a638db69f84a48d70d18784617. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH7812224970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc616b804fb189e318fcdb540d1658c719d460f65359cdd1138a3e11ef94e1ad9. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QM4TX2014736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aca528006854329b59176530a650ea6795d7e9c3f9a67d390a222fbb499fb48. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6540838965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7264cfba32998cfea5c5e0cd834eecab9bbc87fc029b6b72f9af9a4fb62bfa. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH6540838966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00520be90403a6f3b864ff87bfa7b8a6ba647fc0772456bddc0b56339e3e41e0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CH6540838967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430bad4b13a8d0b927de7d6100e2a0c2c8f15dc5786182d1b1adc200c657fb0a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH6540838968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ebd4469b1258a2c824604292ee6ff66d03738d16f2837477fe4e918573caa7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH6540838971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4622427360c432d4cea0de41c26edaf5c732c44c58fd1933b325efc3548522. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CA5KR1569876.
Lady & the Tripp E.P. (Songs from Jupiter T.G.C.)