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 0xc988996e4c4d3d12bd444bece02edce8664e6282d23fae5400e6e5f45cff2eeb. 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/e1b09d8d-c00d-433e-9a14-406210cde55b.json and https://artists.proofprofile.net/proofs/artist/e1b09d8d-c00d-433e-9a14-406210cde55b.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 0x929f119f8b7541d83b39eea953dddd03cea242ee0af14aab47c47dc2c611d51f. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/US83Z2462482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b3d2b492855d8e1fe3c87b471ba711bf1ab42353a3e12bf2fb5afd58b277c6. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/US83Z2462483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19deacaa93144ba413f580b706b5b27e08a80d2d09663bdd24b76b5c0f27951. 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/US83Z2465323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e58c791d9079f573b412032eb9a3aa33f989f66e8d6315e136e56599d96425. 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/US83Z2468518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca90c4a5ce163e188195d6782ecc70ed9b8e260104eccf0952b9a94f5cc0ae0c. 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/US83Z2468519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6af6ebb051ebc7e02e635ea13290aecebe569f2b2689502ad6d68bfedf9a6d2. 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/US83Z2477733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f199bfc23ed8ad88cad91038b5174a4c7b1afb1037c8884df4ea047bab7841. 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/US83Z2489634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebd945c66fa36359f26619d0325f37a4dee7a34846c79ecae34dc44bf78f3bf. 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/US83Z2490804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1302f7bc8fd6d119cd1113b79087a0cba693932369b235447f17282e3a184d48. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/US83Z2420950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9064832102697d539214ed272bd989eae3fd7c56204ac94bd35c591e077ca806. 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/US83Z2420946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36148972e9e4d121fcef1d4548de06d6b4ad1edab5dce1a72223da532b39b626. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US83Z2420945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad2563e40559c168338295fb9b4de9851924f4e12ff2c9ac2c3b04d111824f4. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/US83Z2420943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e8fcc42649260b9f12268979f67ff09f31f81613a08099a632d991902bc27e. 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/US83Z2420948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ae8ade896127966c53bbb7a96369a0cbd167d7554f5cea21341698326f5c5a. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/US83Z2420949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5886bf108e811e77c80ba764b744ba049d8e2cad06d0971fcf703db4009d6578. 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/US83Z2428202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd16ca6fffe3239dafbc23a5625d7dc4dd0e4a337a622497b7784657e9e1f20. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/US83Z2428978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf600e43357fbf8e1dad814765a4f77e5153189c9d2142942d7f3005b146fe6d9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/US83Z2500617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7997ea23758d549517f88f56f9da046c3b1a11868f735cebd301968aed71ca91. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/US83Z2503581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4d30e784ca21b71e332cca5545ba475dedc4ed34e63384623d8b4d58de017f. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/US83Z2505071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edef2474328e0cc55fc11e252938bfa33e00d992388d648c5ab8220f058f22d. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/US83Z2505436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d37a9fef6cef809ec90d4578dc2cc4803f6ac4b239a16830c08c03aa7332f13. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/US83Z2517750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ea8405e66e2e40475326f0b36b566821ac1c8a37dcceb371ce64933191771e. 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/US83Z2534172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0879b8e089a106ab38bfbf952d408b7af6a0758f784d7b3eb4d5917440f817f9. 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/US83Z2534173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9386f42013995992cb571592a79fae32b07e71a9411f62dc5bbc748cce77d1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US83Z2543641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe587d4d577ad96033375a5902b57d46e151ab97681ba81dff2352cad146b43df. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US83Z2547479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d84d3c6046448eabd0bc63f43ba4ca5ba536732f036907061b1226d0cc12c7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/US83Z2549588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491d6518703c3c5e1b448fef4600aa418d1d02adbb74db8ad24c32195e49fe0f. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/US83Z2549589.