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 0xca2d2706fb9d56d23fa52b9226fe163e80c029b46878cfc847e87547eaa96441. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee23ea00-4921-4979-8740-3b07b8a3dc27.json and https://artists.proofprofile.net/proofs/artist/ee23ea00-4921-4979-8740-3b07b8a3dc27.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 0x9d3f34b33c6effeb78035ca8a02aca6cb0a2961e743ff877b022f3171fffb3b2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCABR1393373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebfca6b0e28297c2a33a93ed78f7a791d8f443691f57c8a9ef6344b943990ee. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCABR1393381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733e4926aefe200f8c0b1c456f5ba8a157ef08426ad1c88ab3640ff1e57fcdaa. 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/TCABR1393385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95b40c09255705ccd1831da71097b22971322ce7286f6bcc611f9eaa639df60. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/TCABR1393395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b1877eda6f42c9af6af7d294af5dd2d5b8b86e651913c4fb549b5d0e831c85. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDQH1827659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2d3b5786f40f54ab0c7a90e21db73d52534862a885c57375ec2fa3f40f5eb6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDQH1827665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1517ada72327d6798fd2d12d8b6f4b3990f9db32cf0afcdf633bff4e4608ee. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:10:48Z), 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/QZDQH1827667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef24b81c95e2790fc2aa830fa130039f06080eb65300307d81eab5b2230a6dd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:01:34Z), 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/QZDQH1827700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8f6f2dbd297ad8fdba77c58af3fa14638c7f1e336c736938a8f31a7dbe00d9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:02:44Z), 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/QZDQH1827701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130fcec30635d846cf0b61eb1c7e4c43115d22d93d1d5716cf3064ce7a15c806. 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/QZDQH1827703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc365d307473bb6feebfd99b632615f8812339490ec60ef8f717463f4bc75e0b1. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZDQH1827757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf952f340923a71556db4885a80f7ccef62ba996be6fe03791e75711142b5fad9. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:32:10Z), 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/QZDQH1827759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096cd28ce6e030321fa64af95dc5d5b7125e151bf8b837b8ec5268fe402c8283. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDQH1827760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25c934915df1f7b862042a5247984849d50692361cffca7f771b4bbbb617832. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZDQH1827770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7912d5289a322ace14135127660d13c33c98961a516ea75fb83b9a39f6aeefb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:01Z), 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/QZDQH1827719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3b95464691c662856688e56ba26519770bfd8397ee3c6f0c1045badca43919. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZDQH1827720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc55a8fb60a9605afcb410da372247fb4f473e409c8457b8512e42666113354. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDQH1827723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281ad996cf53a3eb38252937ac0aa9c9e7e84f5708684154c661b548abc0f259. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:12Z), 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/QT3F22598992.