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 0x1eff3fb8f919fca861e90148fe5a98ba39d2a2e2503f96179f4358e52a06e7ae. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de130234-f80f-41f4-ae8c-52db4873e354.json and https://artists.proofprofile.net/proofs/artist/de130234-f80f-41f4-ae8c-52db4873e354.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 0xf2db9c944464141360fc171726e776aaccd2fd452e2721e48e448f8078f5940b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR59R1902175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54edcfe25bfd3ed3a7738b3961d09c8302f63a4c8ab6e8a80e82d8a74acbeace. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR59R1902178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9036437b0e78c0841c8cd1a271f5778e9c218423ad60d07a631135f5c6f1b825. 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/FR59R1902179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9be45869732f5c94c57ac570c41f14bf34669a2199262f54d5a42fd2f0e3f4. 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/FR59R1902109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0391924a93bbb7ad447b68a251a6decf47111ab9007764c70d329be91985c39. 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/FR2X41734420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03d344f60cf1e87a79dbf5ac75d283b51a5e3960215156466b876a81a2f860e. 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/FR2X41734424.
Bangla Tiger (feat. Sourik, Sourav, Adhyan & Rupak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c19d95b2a354325a08752a85ea94b5e224a62c8d256e30576a4f4efbd72d913. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR10S1837410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563837f83de8fb661b9f083ba6ed1e4e07b5be5c48fc5aa23f2f2efd09d29ca5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA072127024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354d7c3d65f2f354dab9190f213b19e5fa71a2731328321f9aed47fbfafdd732. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/DGA072127031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa764201efdf0011eacf0f06713d9349b9057ff5373faceb75b8d51fd177ec294. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA072114079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcb2749ccb8d72f967124d793292f634330423b06391bef8ab7ba1947d1c29b. 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/FRX202295433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0454a8a79e3de11ab6f8e451d2eb4c89653addf1f7c2373c6442bb5adb26651. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRX872426831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d043736bf1caebae3e6e56da077000a865d4b7f50aa1e6b6847b515d6625b71. 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/FRX872533552.