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 0x4fff2ba4126dbd59b41cf4b830743fd7000900f19757a7a105b000a65932f254. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8dd72626-f5cd-41de-ba15-dc3fae06f6d9.json and https://artists.proofprofile.net/proofs/artist/8dd72626-f5cd-41de-ba15-dc3fae06f6d9.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 0xf4f719ec449f49c4ff5c1aab918b01305107c498ad0918bb6b389b9dee2c47e8. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:37Z), 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/UKXN22598335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b352ca31a1952014bacb11ca1f96c294d10527f7ec794b0610acf42a107a29. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GX3Q92512996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4329f106d600e5a1228f00f4cddfe1cfa2151bd585ad72442f809fd80918659. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:30:40Z), 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/GX3Q92512997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066e656afbf69d80d84d216f4a2b23480021b715a6b544ca6393ef7e98d2fd97. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:30:06Z), 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/GX3Q92513014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd440dd4bebe57a5ba57a699933704bc9bfb10c918e9ed6e978d3300273d3d089. 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/GX3Q92513015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6230c8aa594f0b38781f79f94a40203995e88fa9340cdbe5da6fd74a1c14d6c5. 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/GX3Q92513017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dc435061628f92ea24120a7a0796f65adc4fdb2a7d0a75f1d767246bca7d4d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:49Z), 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/GX3Q92533504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a9915f3572727c61e8abf4d8142d8b6d3921489f95c40ef3c2c549acd03139. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKXN22542259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea97d92cf4708c7034e928c0dea207cc17885760f0b2678f16e070d3e136baf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKXN22505262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e4d4e2a2e9f5fa82700f80fd6fb0b13c46bba478e2f10e26fe3cbddc1abb5b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UKXN22522251.
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