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 0x21313a67f06f948e3642ad1f6628d3e3db6cb00c56163010409bf08243c15477. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e673ea4c-4289-45c8-94e8-45cae1cc1200.json and https://artists.proofprofile.net/proofs/artist/e673ea4c-4289-45c8-94e8-45cae1cc1200.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 0xda42df0d4c59c9b31965af343aeb8c0091b4cfbe9d9440c6963782868b34fc41. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEY471980643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7cfac2f6afe001c7842edf761811fce1da5f805ee0900e3cacb581d15b62a7. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-17T08:59:11Z), 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/DEY471980644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0e2984b1cf3b4e3efea052e4f35ceddf84b222bd7b55d511e3b5221181cadf. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEY472080676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3ddc26db95191983cccb1201537288c2cb558746a796c2c0d12ead1e1d0961. 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/DEY472080678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce722c7aabcd9bb1f089d83f5748639f4a61f56fd9a31e22856260c9711c1f6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEY472083856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7d326494e2f37e03117b36f8645ff5569a4aa20e8809dab2b86dabf32c39b8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:49:16Z), 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/DEY472083857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2683de3caba1b6d6983895d16a2685c7cef585f99bed07668276e8564b55a3b1. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEY472083858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a17b3447f44405f70326298115e3c03b6d7829365b9bfe717b57c3da95f70d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEY472083859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8136c10a1dafa06d308f281f92b6c8a69dcb2224c012863c96c27696161bbacf. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:27:47Z), 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/DEY472083860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0c6c8a6231ed0bd6c3bfe63a14df6d81f34a82e156d744188718428ff01d65. 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/DEY472083861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6da9d03d7783c8397b288a0f43996bd6cd1d1897ed2c6709e232b85403d8a0a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEY472083862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203704815bc3e1886c88cec5324ef7eae3c5632e7502f2b99bf314bedccb49a0. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEY472083863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0ed42557f4c52b2957f9bd62774d04fdc66911b11e65434708b750284c028e. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEY472083866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba6d88e18e11008373088fd030b27b2b281e26ac7810112a698af03ecd31ec0. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:47:57Z), 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/DEY472175238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf522ad08c1087ac5e6b61c96a9394d67b90e93bc296029a9be783af903429778. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:05:26Z), 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/DEY472178309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faa0d8c9f6cf7be82c09417e8f622977ffcc90c0ebb6ddcad79a917b84cc282. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEN962336709.