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 0xb2664cc944c6089a68d1335a0334f7568b8f14deff784b78f0abfed70239fab2. 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/5659d2cf-ea17-4305-921b-b411d80717ea.json and https://artists.proofprofile.net/proofs/artist/5659d2cf-ea17-4305-921b-b411d80717ea.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 0x5dfca6423395473f6bc7930ea7e2ec4106491ad9461c771754254845e9e4fa31. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QMJYX2435901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a49a76ff522b832b28ff5d446b82e2e48d3fc835e68e14e5dbde4e0a3920dde. 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/QMJYX2435902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf735d81c71c7b2e8054063b2bcb58cf38b160373f41e6b7928fba4bb952b4f41. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMJYX2435903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366cba95c346e3f5fb9a4c0f7c5c2dbd6d61146896dc6957c9889551ba52faf2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:10:26Z), 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/QMJYX2435904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7737d1e5504a37f22a7f5f1fccdaa45b95fb4ffe5ac3883268e3da627426d349. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:43:13Z), 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/QMJYX2435905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55449c9476c01c604e4803bded499328c8d2e9d4b704340383263a5b17dc4747. 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/QMJYX2435906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec21d1c4ffba6f34c5b4255e1df0438932928fdfb7d14394a3b44a65cba42153. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:06:26Z), 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/QMJYX2435907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a9f2c6967d7e614a6dacdc687369de84e0c7c6b256b48637ff0b1cbc1476ab. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:34:43Z), 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/QMJYX2435908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc48ba388680e393a989d549ced298640fa1d23edeecf4fd58a68e74b5867a3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:46:33Z), 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/QMJYX2435909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf16e45ef9c76eca282eec6d3a3e474a0bfab6775f1cb8f81fc69538c1df0d4. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QMJYX2435910.