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 0x0bb228de43c58dabd39baffac4dba00976c853ed58830f5379241012f726f349. 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/4578ba09-ebfa-4804-bb01-c570453fc95a.json and https://artists.proofprofile.net/proofs/artist/4578ba09-ebfa-4804-bb01-c570453fc95a.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 0x95a24aefd81a88803632b32e575eeeb9604b121c90b543db155677f0476e3db1. 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/QZNWQ2144420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91594d132dfdc08d68df69609155eefba29b6a2c74c8885d78ca084569e3ae82. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:32:33Z), 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/QZTB82261177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3245a52a6d06764e9bf2f5246102bfbbc2f3f064b2f4a9aaf6d074a6c9c5418. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB82261187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2100c3728e05993466e90f5ef1611169b36835ca4dd573769ad196c860cbfc82. 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/QZHN92369084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf59656a71a4447709de9508c99f67f53852d15dea29db3f89d928486813a54. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6H2467447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4646393ac3fb2ccabe0ea698df8187145dd86c4401229b37f78cff3068831c7c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAX2410860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fe8d61530f371e7ec9c73cbf0b4108fae3e3b41b865fd874101b96b83c656d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:04:02Z), 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/QZZ7V2485450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7b5dcc116fbc39659c8cf70be562dde080e36100ec7a7e19db1f50a5439cb9. 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/QZZ7V2485457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf615c080497ca9122789c962bf824f2b4c2f3cc004077d9507fa753c6e324f1. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:43:13Z), 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/QZZ7V2485458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66463e8e5cf8abd7ab2c3f96cb8f4f320065c675989802657f3641d67e1870b7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7V2485459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03caa643d6bcab337c212f44787db2cc709bbbdacfd046416f340b3db1c1f72. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7V2485462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9481c186c47214b2ee28b0f70cda9c98328ec331e4fe8cba8476a1ee9f958d2a. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWZ2512034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3093967595d61b5e35da235f7fd6516d8b8ff7f4111a044557f26d970ef369d0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZRP52545190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2b6550c7775a4fe8179c9dbca5624b1acee576350b8d3fe32548a33651cfe5. 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/QT3EX2559129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e17e0dfcd48a61fbb53893be40c11fcf3b5e0160d06caa0cb5f33bd69d55f5a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3EX2559168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9bd3d9d51d87d691d4f61d8369a8888b86d3b4161c0cdbe8f30cbcaa0e22fd. 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/USLD91759946.