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 0x4b37d95c482c181a4c05374a404e9bba5db3c44a273c3e83b3d974800085fc5c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d412cf67-2b58-4bbf-9d76-c578f8157a5d.json and https://artists.proofprofile.net/proofs/artist/d412cf67-2b58-4bbf-9d76-c578f8157a5d.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 0x4b2bf2993a1e06927574f7e8aed67a9acb91df413c93dd7674d50cf744fdae1d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/INS182000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cd507aed197d58bace1d8626960330912a2b0c5d601006b4eedced78e890ca. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/INE182013192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3653442af6f424e7a940dd811d415e090f88d9e42c341a8d8295fa11876974. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/INA382000733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1278b1b97ea8ca835f3e3c27ed91fd75c4047337e82e1721e4c30d7014e0a36c. 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/INT102100557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5f5ab4a43e7d085ebd88d49ee7cb8ce4d000431fa7f52ea6735cca3686afca. 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/FRX452326429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9962420d95dac660fe349f0a07886bf640458dcccc5fdfd99a107db10bdf5d75. 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/DGA052380410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca11ff8ab2479662728ec5d5f895230fedb1a695f49052758c0aa1a36d286bd5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA072373893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45b2a40d39005ab4b755297b6b1a9a0e871695379ddb01b3af4c0628c9238f3. 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/FRX452421195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b26bd417efd860e8c5fa29ccdb9ee4fd22dd18459144af9402a9cd2b187748b. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/INT102201664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc298812801ba380c83a77405ca5a67cc09e89c13c4bc4dfe7bfc7b99e776a3. 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/INT102201665.
Sri Guru Hargobind Dev Ji (Chatthe Avtaar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fd640ce505ce3254c545b300a924bad72b637e622021b608bd52f2e1c58d8b. 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/INT102201668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4b15c7d114172a85c28fa88a09a7c96300bb2b75af0bb6b13c47a7a4acf0f3. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/INT102201669.
Sri Guru Harkrishan Dev Ji (Anthave Avtaar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3692299d968b5d62b4c28ec58a3893b03097eff5a8c24b12551addfca5f9d2. 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/INT102201670.
Sri Guru Teg Bahadur Dev Ji (Nauve Avtaar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b72c3a687c3da77f8e31f8d57fd18ee7932787ca4fa323fd8fdae29cb7711f8. 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/INT102201671.
Sri Guru Granth Sahib Ji (Dus Avtaar Ki Jyot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fe62bfe493f3634c875cd70ab4577de814eaa56e1e8a4c775817061f4a51b8. 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/INT102201673.