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 0x5078a5606992c0716a12bdf2fb98207e465bbd4ab3c482fde7c54f56d6a58b39. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66ec29c7-52e6-49fa-a624-6c0ef18037fa.json and https://artists.proofprofile.net/proofs/artist/66ec29c7-52e6-49fa-a624-6c0ef18037fa.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 0x2e294e8333dd45afd297f29a2ee4be1aa9771cbe18d41278a88984e1b063f31f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GX53U2456835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe641d4cd28af727105492a468b46d8e9ad042cc3591d6270b02623af5de3a028. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX53U2456443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b8a8366186a8629f232d1a8e4f7483ecaad29edd2f83caf75b154e4ec7c532. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX53U2456444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888f5258914dbd186be6aca3d93db94a04c59fb976325db6b461937fd43ea9b2. 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/GX53U2456445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5101aa4a5c8c3d2bc777035e5e192f3942ed3fc75f14423ecd21f1cd81a5b151. 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/GX53U2456446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb548b4aba5415946167151de7ea7a99660e647dd6eda454811d3bd3571f3579d. 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/GX53U2457031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea4b50e346a31008896ff378d3b084b35050fd27677b609423bd197c2550377. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX53U2457028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e641423b534d5e5db8bc1ff01e0f4067983590af0ef82547afee9b9d23b8428. 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/GX53U2456682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b85fe512f54d37cde4c6b890cdc732836fc4e991695f246397929cc12b04569. 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/GX53U2456502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698702898a606dda64acb8462f910ab2e98f284666a703cc48446d9723fe631d. 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/GX53U2456503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cffb71e8ed4cccfe629670d108fa51a567141cb8372874933223fb6fd33b4a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX53U2456504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d483b70590f0b51ca2b7d6453c3923f2bc42173b061b0251051d3b64c6a8a86. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX53U2456505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc826cf89d06753565613d7c8641a74de521ba242d07dc8b84549c37ec649fa63. 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/GX53U2456506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4eb6c30d3512d3029d39df37b8888feba4326c2c02a01c3d598a3c5ea3f55d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX53U2456430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7735cf95d51cd4b936512e49fa925e17ff9a964af88542d344163b34b381d77b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX53U2456431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb1ab2473839e83dc3bb3664cf175851be8b213e8208e66bf10b815823a0b3. 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/GX53U2456432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0fc301025d61aaded9b4ada996c46d3381beed74d7bb16f85628328ca6d072. 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/GX53U2456433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb39e4fa3db3845d575fab25b5bdc586e8c678f53ab91949c3cea57904a0a929. 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/GX53U2456539.