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 0x9918fd1fd42ed735b8e8485ead96f7b6edd1b25ba8fdcccc6c175f795c3631a7. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c714a58a-fc9c-4d0b-b174-d3a1904c48d9.json and https://artists.proofprofile.net/proofs/artist/c714a58a-fc9c-4d0b-b174-d3a1904c48d9.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 0xcbfc199f3278a50fa3502efca3179b6ea3f8a87a15fa6a480ee3584744ac149c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6A92353311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800284d0684949b79d95732c0a799c11906d7dedc2c5a8bfa61c9457f12f8872. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6XX2361759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb21e6fc109d89eccfd32ffe76311ab995c18ca603cdd441ee7f3fdcc1b57f9e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE6QE2408565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3532f7be33b88d10e9318b610471f506a80df6f311c08101d8402504b690e11. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SE6QE2408566.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048b48a3f1c8202e9481c74708ae71297c90d7ae647c5982826f2069d78b40ca. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE6QE2408571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ba9d9f4f3d1beda85c683963ab2553d91a8cd7f936644825238fcf55f0738c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE6QE2408574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617acd998cb5584ba619e746fee519bac2d2bb767da23e617aea937e98d3fc5d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE6QE2408576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee33bcc614fe6f3e192bf8b08dfc3d926e368831e38e0aba0f32f971dc1c759. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:00:48Z), 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/SE6HN2474564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b487a7de88681a38a1eaa6fae49c4ac55c5a778bf51f442caca4f985f0191f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE6HN2474566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cbe6d3de614758d69aef29214e00ed9e3e6565200507145a6460e0f6f7d01a. 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/SE6QE2466085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489743fb09f9fd2b27dd777e0ae7c7988d6d9338e2b9cceb3331b38d5c655a3a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE5BU2529143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4efb092f2cbc4476d5be25851c5879721a70f0728fdc8871a798e1f6514bf3. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:48:40Z), 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/SE5BU2529144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1bdc2dadfba2f6f3cdeaf5ebcfe4feecf4b046f98a8e5f845158082b9e6412. 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/SE5BU2529147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f9214f750988026c57f9b178cbe215074036531aa3264a63e61984401925f8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:36:21Z), 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/SE5BU2529148.