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 0xf29eefbc0d132cfab00c7fb686bebe07bb3cc8689880d4fbcee12a27eab8578a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e663c25-677a-4b3e-b8d4-3ffadc131e70.json and https://artists.proofprofile.net/proofs/artist/7e663c25-677a-4b3e-b8d4-3ffadc131e70.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 0xe50edbdad28fa8b474a3d1afe7bf332c57e0e27a71052c93f6282008f88a4299. 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/QZHNA2071595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eabe0d573c2ffb01451ad57c116a5162225fea7e0eb1960eeaa22056788a0c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:59:21Z), 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/QZK6G2063360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1edae05388affe7e7f1523bf40b54d8e97b76a9178c307808b8c9eef05abf5f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:05Z), 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/QZK6F2163707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166a1eaa72d57ad1a8c7273daa5329563ee98fa580103f08a89c8f4137e41513. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZWFS2490688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c387e4acf748d4eb37e22d81bd17e5584f672a3204c092f353a0a5b71c1d1c2. 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/QZWFS2490689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2e3222391116097fea0cb3287cf0fcdf2a1909aa26a354bca3c254aa6beef1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFS2490690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d50f86fff8f773f5deff397b43370bf562a2d6ed0d7f5df33c5ec944390abe. 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/QZWFS2490691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba72e00006eec58ac4c84031d1668c374acab6cb41a47f17c80d0a63419543ac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFS2490692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e30ff6c992c439b3953f6e92f729950f57621fdf867ecbb87c74866e5a8476. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZK6P2523588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cd9b170ef8dfd2912b4b952624de247bb356eaee1ee470afe702577e68500b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTAX2575799.