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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74c9476fe4f843f247cac64d328fb31a224452c29e34e668aeb1aa9bffccaee. 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/2e561bc9-2cac-40a9-bb78-104ce020ae81.json and https://artists.proofprofile.net/proofs/artist/2e561bc9-2cac-40a9-bb78-104ce020ae81.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5176de2121bfda1d3da57aab854faff0c04d2b1fe94e11ce6247c4d972b9cb1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTAU2256260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e5b23fbbf387d529d85b8c89096b6ef29ae255f358eb15595dd36da277d9dc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ22441787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f0c624eaee2d939568bc3cf8d203fc0218edfdc9090034458224db59282dcd. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTBF2312988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5176de2121bfda1d3da57aab854faff0c04d2b1fe94e11ce6247c4d972b9cb1. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTAU2256260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a71f9e6eabbddb9350954371ed1045a1ee055625c1b2cd94f7809ccaf343f5. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:27:47Z), 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/QZTAS2453326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5893395e2c87338ad3b06d2343bc189bd354244be9cac9370ad88f69b91d1f38. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB72437225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765dc894b2208e15353cbf73c4d83f889c16ef27c51f098a33e48702ab2d021e. 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/QZWFP2483331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d889e3cd94f10ed615311641fb0a21eb7d602dc6283b7f1e07f642a1305d91. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZWFT2442581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5893395e2c87338ad3b06d2343bc189bd354244be9cac9370ad88f69b91d1f38. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTB72437225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3462d1844f47ef94e459b001cade24b7c08c00a806a45e1781dc17508bf88a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:59Z), 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/QZZ7R2555882.