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 0xa36760cc60e856dcea882c16646db7b4359d2eead7c37b952c1fa524cd6f4d77. 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/63cf6014-ca81-47f0-8b99-82c182a338b4.json and https://artists.proofprofile.net/proofs/artist/63cf6014-ca81-47f0-8b99-82c182a338b4.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 0x71c8221aefd2a066996916a3fceae961e3b70455704b910311a3c646311b9cd3. 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/QT65W2515439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00eb1267fa6ca951107887153b1c363107755daaf77a4ec04717878dc7862a26. 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/IDA141708241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9277b3f8eb4156195a0a7a909ddc4623b9bbd0764575f77e38d5cb7ea5ec66. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/IDA141708242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fb07d797f733e4067b716462e712ede32006af156c773992f2e719c8d53381. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT65W2581630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e20c1a45a1f140482a836f3283ffd6365627a07179ef217f077489ab31bd93. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/IDA141708255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2fd92b16a6b7e1e6ce414f776e91480dae84940a901031258b5b207bb0ef29. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/IDA141708256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08253e607bd78e77f02f0d71c00f2ec97e7624ebc08a2402ca7b6deafd92ba88. 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/IDA141708257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97b4bf9cb6c52e6568912b2c21e7006043a2a463a7e8c12785d391d28a5b391. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:32:48Z), 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/IDA141708259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3956b4d2e3e47db928ee6e337c8eea7731120dbbdd08cab8227178bbe786fff. 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/IDA141708261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b8b1e9e0c374f9cc36e2fa0184f96bbb17fa8fc2fef1457abf276091c999c0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6I32001242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfa8b7a9f7bd82f1f2656bcd77c087d0110cd91f3fd3ffe30f1ec9a013a45a0. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SE6I32001243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f90f9b1c894c1ad72ef0a0751a9c47707d1fc0d3bdc9baabffff54bafdb8694. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/FRX872275509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9526154edff5ed5b832be38001eee221a1fcfe66de33a85ea2a1640c9f806c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT65W2504245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33433f8dbff552d5d992ef73ea73602bb5608939eac7fdc5679c67936a64fc4a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DGA0Q2376987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ce46e51e66bc26c55a7bceb2a4f3076dfb92539cf173185d1d7b3874f29154. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT65X2527567.