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 0x9c5c7cb9082c27acd9ee64e978d457dd5c87e2619af40e1bd08457299112c213. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e51b368e-ed4e-4b84-b624-26153e48ea64.json and https://artists.proofprofile.net/proofs/artist/e51b368e-ed4e-4b84-b624-26153e48ea64.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 0x878bc30adf165f5e0fe24693e1ecf00d0bceb001b1f5132414a4ceaaf9b5f06a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU1963927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3e2efe6adface3f5361c30250bb02220c564a0958fb1f943d54c86054b25c6. 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/GBKQU1963930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d8d8ce41917a2f31345f41128e42c1528bd130f76b944515ecd9784ef27be2. 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/GBKQU1963935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7730d81efce8cb0fefd9a21ba5910d357f0bb4d0b41a3f3433abcc75cd78b8ec. 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/GBKQU1963939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd74482ca38a6c12b61aa978102ddbc82b5518aef86450c168949ee3da3b17fe. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/BCVP52100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe790ad88c92fe2291063ae5fe088126c6ab160507046839ee453c1bf901282e. 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/BCVP52100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81a17ac072af1db6dda621dda0f4db9a8dc899b9d49987ce0ca589ac7c84bb6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BR5V02400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe9f1f9c1f6464e9535bd69539c0f4389314971928a4de7dae97935f9128843. 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/QZK6H2467802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54f85dc4b8c5099ef0066480310585e36fefe5d77da305060c492f226c7aa43. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6J2464801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c201175f56f194d000a0965fad150e4e5016d5d6ea554fdeb89448e05fae629. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2297693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85aae556c66e071ec2c96069ca6a268540d8387e44b2f3964598ac3f2b77428. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZES52193473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb393a057fb808a46488b23d25ad5fd1c68fc95edf69e1617c8aec48392ca3c3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES52193474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e861534a056c9c3fd8621121f677cbb2950b4c573ed508964964b20e6f5690. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES52193475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eea81f2f10a18f5b92c26a73e4582ec4f040d19c2498a4c18b12c18f2f69d3. 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/GBLV61802153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0600891adc4b18309ff1b52977015f9a7d4e95a6ba08469589aa64d9c2676d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:58:03Z), 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/GBLV61802145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba64cb71b1b70353867b63e7ce8a6885ce5564877c613b4eef15706b503ce28b. 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/GBLV62022786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137274ae634c4f17d8a974a90a2c759ceacafb9046fc51a3b25b3142a2cb819a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLV62022788.