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 0x8e5e69ee7edf1c3f52fb2b9b8d97420c19e5429cbbe188de21011321a82b9b37. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c4e6aee-2438-4af9-a2d7-28a7b1a68570.json and https://artists.proofprofile.net/proofs/artist/8c4e6aee-2438-4af9-a2d7-28a7b1a68570.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 0x7a02d4ba30fef69b1bbe32a717c718d6b81f505ec25ec8f6b343e4e402cf637b. 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/QZYFZ2438791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6462fc25597e980d15406bd055c2aa18c4fd5105e082d6fc1f3941f620300072. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZWDW2493171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7a3cdaa3a7dd97736b56fa5e1214e0a78fecd19cbbfe7d677c43e0b3715718. 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/QZWDW2494352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cfc846b088f4da5921d89b4b49b9a382d6d86ffc186e12a976a963b21ecacd. 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/QZWDW2496807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a18646b662e4e6f59e2e97a8d85bc589f0df04862ca3a488b3af0ded5e829e3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZN882408984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb53295f337cea0917c790b5c8a44209f615e0815694c30d989aaa02d11a226. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZN882428332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddb7bc23cb5d52a0a95647ddc54880b2536e922d1250fca3e927e2cc4cada81. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZN882504347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f29c4172e35d584044cc43cbf016d6b1a752f631df3d65218ebd9df93078cca. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:20:53Z), 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/QZN882526128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981c8730afcad9546805b3a60fd2b98b37b3cf2ea9a3c941a4e4d00887e88582. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZN882549197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64663a4091f34d22a7d1fe9c6f64f2f2f49bf9661d87a479d76568eac3fe79d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZN882551830.