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 0x2fa8122345345ad18cb2f7337edec40d888e619d9a8a5356723ed95fbc14ec91. 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/b7ab8fe6-328f-4b7a-9c8f-d4e43e00e19c.json and https://artists.proofprofile.net/proofs/artist/b7ab8fe6-328f-4b7a-9c8f-d4e43e00e19c.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 0xce4eef3cb815c289b1f8b10871b4b15a03431ea3dd1ae7228c7d052a477d92f2. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/FR96X2421164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc987088f4007961a248aa25fda6f785d3bf291dbceff5ddb2c91b795b6f3680. 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/FRX762152018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eab1274fb387af6a4b27fc001087c397ea0feccafa256c49e6af03a8a43780. 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/FRX762217659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd2b09483f0c5e3020f0390519659589547e12a6dd40415c3dced5423730387. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/FR10S2235686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5b184e1529e662538f6abf8389f93130d8e9ab8fd5a6061634c62ccca35f68. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FRX452249943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98a422dcd71694326ecfa95688b95646b777d0ec36aaa495d0e51d6e5be573d. 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/FRX762340158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c4ba1af9a49bc5a0360df3ab893224bec767e4591c2d7179ef4c452be36f69. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/INS7A2445177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3be6e022eeb76f864453b3bce6482ed505aebf0ab3f9df4923fc5e674b966c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DGA062304446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c81b7185c49ab9e71dd8101d8a163a3c4f6a51ca2f24713ad172b4e32797a9. 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/DGA0P2315074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca07927c562afd1999afa9cc94222793e650ab1cefa1bded6e89382142abbcf. 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/QZWFM2343155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dd93c749d4d0a1c8cd65a4bbf2befcfa00742dd19bab63eeb10ebb45361084. 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/FR10S2479116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e5c8685f683d0884b2038e5465e64c477f399ca892e72aecdf85a0de9d98c6. 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/FR2X42422184.
Chaina Jete Briddhasrom (Baul Sukumar Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b23320a83b8e7a4dd597e86104793b51bf98fd6cd8f1bb9f69c1cde6ba7de29. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DGA0Q2411788.
Tumi Apon Apon Vebe Jare Jibontare Korcho Khoy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8353d24d07fde3272078517300246163a6c2eb36f947a1aac1fe12712a4e87. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR2X42503901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b93a98d4f1175712b583c6aa49ba72d365f358d6e65e4d0262f32fa541a5884. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/HUDHU2520628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3928647d3fff340316c6667063ae4805e5713644800dd49bdb65d7cb2f47f9b7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/IND292502671.