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 0xdad815bc48557d936c31db7f9bd95d0bbecd1da70b50551138eac90787549b8e. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6c11c2d-fd22-461e-bdfa-b5611f789277.json and https://artists.proofprofile.net/proofs/artist/f6c11c2d-fd22-461e-bdfa-b5611f789277.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 0xf36f57a5834666998acc7599a1bbb593ac164cfe7762626c6a867c155d300553. 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/QZFZ21973556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24383a15cc8790da231658e1f455de97c4c3342c7c2b9d79f637c3dd6928af8. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZFZ21973557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4ad7a651e41a417dd6df183de986c46356f4abfa186188908bcbee23495d2c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ21973559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7570d8727e13926fba4f0ed75734772c5900466a130d91f2e5bbd3579b44200. 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/QZFZ21973560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf184badade54cc5cbb86c80507d0811eedecb20dfa6a6e0353795f01965404. 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/QZFZ21973561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7342e5bb7fc9ed614b8d2216fa36cf04ef2c363e516996f3591179b207a2db5d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ21973562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9a2c2de85a283af390ae57ea7885103ba55a6c8c7595315a606f19b1f035d7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFZ21970898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb695de10cac8aea8d8b538ccd302c81fa440b73c20373bc865052f7fdafa239c. 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/QZFZ21970899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d43a15bd97cc126e768cab488ac3a547c17bfb29f5f9562023ae284169c4d49. 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/QZFZ21970900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dd9890f15fedef74668f3c593ad239ebe669e10825316d57ed34c75b0639cf. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:39Z), 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/QZFZ21970901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa247e8862342169ba94c438ab56084de8d4153502e386958899bba531eeb5f37. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:24:16Z), 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/QZFZ21970903.