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 0x19ec5ba92fc7fa5933a8a7f4e7f2a187c85c101157e2ee9584cb5edb4867b122. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63bbddc6-d69a-4540-90e2-ca5da92776f1.json and https://artists.proofprofile.net/proofs/artist/63bbddc6-d69a-4540-90e2-ca5da92776f1.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 0xd151213eaaf5aea7537f32dc5a3cbd1d9600e7071ffc01c0774a5fc70b303c64. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX201813419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c67b1c07d07a82b9c0284d5eb7b9d2903afc844aa51f4d45a97d3e38c881b26. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FRX201813422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa7db5b055ce98c4dfefa595aaaef47c2cffad5b27841c7bb6160c96178bcb8. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR59R1951173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23621236b2d82223af227b53f7d878403915c699261e7ddbe455d3eb3e152fb8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR96X1975994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83573eb7662747b8cb05b785407b0e6fa44e2a8ecef00e09ab52bfbe2c5cdeb1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX201981867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19641c0c5f1e6fb988b0ccc5a42f4900e7f8efbe6f836f6e4eb3e9feed3eb46f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FRX281992523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e6d8221037bbdedd1214662d22f8f24e77eced7a1ae2531d1ec9922091b9b6. 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/FR10S2202981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31aedc03605a2854f1177576d94e97d07e6bb9464db7b3859d6396710ca9c6b0. 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/FRX762127063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0029605612bd9dc3e3091430a23f9536ec48cd1f4b1818bdd54a8f74f7d257. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/FR10S2202982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4d04cae08c02c2d60ca2dd54a3a5789ac487586a5b3dc9c2ea1b98a28482c4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR10S2202983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5510b42bac1186ae9fcce944df0513cc853034f7af65429820ed1f7e8a07339. 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/FR10S2202985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79eaaa70c00bc51e9725ea74a8bd00446fc2d7034a86e80c70c8e24961eaa0b7. 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/DGA0M2324100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716192b1d58ec864732c4e0a0b4702d041fda5fa9382119697b2f21c4b9f6308. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/DGA0M2324101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe137c31414b1dbadd50042b48c8df038edaf2c54c6858f438e69fc4058f231ef. 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/DGA0M2324102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63e14d748c8de55638668ded78f73321a79be03d16cd6e99bdcb58b1143aac6. 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/DGA0M2324103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bfef16a0090ae76b9fde1ac4b9ea6a35d107185a1efb7088afa5ce53e52ce1. 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/DGA0M2324107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4db8a6f9b245d362c2460aacc593ae569604e11fda8e2cd5bfc148767aea70. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NL8RL2526695.