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 0x18270495e164ba70ef832a985094faa0e81f062b15a894f886cb870a83460071. 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/422d5a95-f4da-4220-8ee4-f3cf4d87fa4a.json and https://artists.proofprofile.net/proofs/artist/422d5a95-f4da-4220-8ee4-f3cf4d87fa4a.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 0xc803cca64f60bcc0317a7842da37b8549293c8e0637329befe51c10dcc811f56. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/INM991400396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a142a9fe1ba00598332a6b591944d678d77a9c09f5e5e1e8f70fa53d481ec2a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/INM990701275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e89ac77e4aac97433df78e0a8368bd0ad5a927f98f29266f5ff18ec8b27d385. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/INM990701276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7f35a35464d98bfa974890628c8ea6794ab0caa9f784b84bbd7a90ede12a61. 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/INM990701277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac5866c40045dbafa65128139ce41974fa49e08aab60220f1201b11c9de4215. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/INM990701278.
Samayalkaranin Kavalaiyum Pasuvin Nizhalum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebc6033a22696c47a1703eeda600ae67b922b8463f33c3a3c9c97fa64d6cfa1. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/INM991000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dea071b769a20b10cddf99c48487c942681e5f6e8891a5f5be21ab61d396b6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/INM991000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2af56070af397225a88b028ead1871e678b3f30168e9425ea3c507a89afff50. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/INM991000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5188036e5f34780ec2a4830028df098f15b619ea8c44e9b20d1d8812bc69bd9e. 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/INM991000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad94e77896b7347271eaa50d693a2476c356b385c1e4b7cd067db7052d60bc4. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/INM991000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a88e9dc578b2f1148700f3513d4bc197d3cacee734183410e8a5ca3e572060. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/INM991000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0512a7b99d6d615d250a52577208d776e047cc0fbef99744c3c68f820367fc. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/INM991100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84af3cc76c25742ceaff87a5df49a143204ec6a0c17a33e8fc207cdab7d6cc1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/INM991000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa047a1b5094b2253d8165d66d46f60bcd061fa1105ebc5cc8fa02c0e6ca04a79. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/INM991100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d11510c19ed5ba83e58f3a4e7f1f83505f994c8c6dadd7ae9beb980aab78419. 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/INM991100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3dbaa1e77416b50cc5ed8a18a52a0e874fd12fde1bac31a5346e2dd7b131c0. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/INM990700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecefd6e15710ed456d98cb854da85b1a89d38bab0e88c20fb0442dde41ad009. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/INM990700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b23aab0d32f26916f55104d9c0bcb24be406874bf532517df5effaed02665d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/INM990700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e5e35d1aa1f673e48bf9ba6f0ea9fc1de6f758ef464dc5fc7217e9691400a5. 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/INM990700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29ac20ebe1922aa0b0a00af5c658e05e88e80704269a6aea6066937c1d26ab0. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/INM991400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc803cca64f60bcc0317a7842da37b8549293c8e0637329befe51c10dcc811f56. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/INM991400396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58d6b9e26c1d8a5827e1e60ece1d7c8174274bef1e6fd87da521e0ac1cfc069. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/INM990900542.