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 0x2fd6d8f19d63240e2c16b7a40badd180324b08c9f1bdf0fae0647d27684bf099. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89ab3d37-2d0c-430a-bd36-22c2e5764b3d.json and https://artists.proofprofile.net/proofs/artist/89ab3d37-2d0c-430a-bd36-22c2e5764b3d.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 0xd967a28a918f84dd3c0379f4dd69986b6fea3ed307cf17bdd9f8f9bd8a884c1c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:44Z), 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/QZFYW2093658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90566765fa452ec567d963271acd62d231d6d73b466b25854ada1d7b5eb4dd28. 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/CLKT22003593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d949182e853bd3a91e3d8069b9b49bbd9418c3b220c1b4d5919c677f6d0f21. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CLKT22003599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b19a4fd3774ee34c9424a03b081e13baee79072441f63fb974d89607649db2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CLKT22003596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c14cba7088ca32f015e9e90bf76fbfe9e5da38a4eb7d83758dd199723316646. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CLKT22003591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb0e5879aa08a167c9d9365e6b24ce930b1d2f38f98cb0213c82873c8f8d082. 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/QMDA62127749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7094c55bb8c38f38e609cefb90212954cc6b7ed99b6842f796f7e81e6b6cd07. 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/QMDA62127745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cad1af0aaa3b589c710308351ed279eec632709b8dbdfef0f27987ebf370c19. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA62127747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994b11f7fb6850931542e677cd7de1bf51d507d3d42dd23ffae87ab2cca10921. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA62127752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5d18b0257977d985e0e9c016e32f6921ff1d9263aeaed39843a6039b8dd3a4. 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/QMDA62127750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42ae94bd5aab265aa373274b440f00ed48f41b37e8fc529be90d66fa04708d2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA62127751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa21fa31b4a27ed710ed6b74e10128622cbffbb7bb05fb3e9a3314093dbf7f8f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW2253778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3711b9d52394f631c449a9e669df62f36005e65e82cc43e4a487ac9aa35fbf8. 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/QM4TW2253759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074ece78717bcf339cfe8f11061db4d2015c8ba5895d607abfea5615598bf67a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QM4TW2253779.
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 0x5ad07f5a6799d23d6c242df83d902445a8c960e6f973d238e01935a25fe5c240. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QM4TW2253780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffaab022887fc4788f25b1e549aecd12860e56d8ebe9949d148ca63d622205a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA62317214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079e5010d9320e4dbddf0db856965b79dea165a823402d6311ba4a2318e0ccc0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA62317217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00eec05d09372978285bb9b3935ee9ea53536e8ad5c920dade27b0192b35e80f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMFMG2345413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9b172136a16b9c933fa663092c1e51e2530e9f80584a4a27ff68b588d0476e. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QM4TW2526750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8313726c01c77690534b9e1380106942e44a4bd21083feb6c62a25471d938da9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMDA72518298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6836944392f701a3500718c75489d86f934a393acd6c9712c1fd5b9cede8e62d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:49Z), 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/QMDA72518294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbae8bafe61cb1e7a483a4feffc0cd11e96e6ce9fa00eda08072efd84fec5616. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:11:19Z), 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/QMDA72518296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b787cc912f8e6f284cd0116a95ee9305216cebc7bfcbb617c0e68800fdd1115. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA72518297.