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 0x59f18644e65aecee7701d1e049b19812a6ed7bd26fcfeff034d80f6aa7754330. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/655b353e-be9e-4508-a327-77fbd99cdf02.json and https://artists.proofprofile.net/proofs/artist/655b353e-be9e-4508-a327-77fbd99cdf02.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 0xfff1b75ee8895852035cf3daec83fd601bbf89d85203b62426a8f87e23e1deae. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFW2546081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb68afc8d1d5451641e5759e35f26c01cf7b49d89be4b05d63ece7317aa87c24. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFW2546083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e5ba1c8bc5c7727957dd0664f646f02101e3af966df2086616e086da3e217e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFW2546159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff06dbbbc9370f595563475662f249d20f760890a8cc9d6193dcd94795a6b542. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZWFW2546103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ab579b2e28eb8fd790b0e82289582abbb3ffe5557ccb637a29160a3ba56795. 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/QZWFW2546306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf445e9d2b3ed0d02528aa112cfe792e4c236b86badc406467d5151fbfdc83ded. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFW2546176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc745aae379c85a6e52e970d31daafddb3c1a6fa34186d3cc30b842b00b792189. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFW2546209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a24115d318530d2abc3ad9a358a8fe5e71159111ce24b2c3261acc50476da8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFW2581975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414e7e3e321a5dce52d27e670042bcf616f739084c6bbd83cda008b081967c1e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFX2511316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1c5e87aa95aedf9d82234a8dcd021c0409801fbe2b34a582ecb4a19d19fa94. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ772566080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560866b9003dd2280b5e9315a220e1a18bcf84edc4902b773a61be28672d6bc2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ772568244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ada04fdc399c2f59db8080cedd5d73dddb3c087c9622d57862f243af201d05. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ782572790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4285fa151974e625aabefb1d1ec705da22706dc4bc2961f87e135ecdbbc4e370. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ782576700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0615ad48a47c5f49949fd80d91cc043519b262d1bcfe7a754bcbab0143f12510. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:21:48Z), 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/QZZ7N2596992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1508afbe16d100d4c17e68d87a36bf5f8e4adc5fd144278da62fda5791b55a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7P2501254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c570e38df0981f360b04fa4795fb8b8001337d9a2471dcb73877b2ac757b46. 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/QZZ7R2562708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d582d87c50bc45f9f906e4293d4a9a6c6dfda879854ab1463715e8304fbe33. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:52:01Z), 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/QT3FB2586873.