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 0xb3349ee95afa3b3392abd5754682dcfc1379cbc1e89929ed5f122a76a700fe50. 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/d48ad179-7c7c-459d-8052-af93ed3e9d0f.json and https://artists.proofprofile.net/proofs/artist/d48ad179-7c7c-459d-8052-af93ed3e9d0f.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 0x0416d3f45b4c2e81dda739d8cb2bfadc44dd7affc9af5d9f44ce805bf17a7b34. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:07:03Z), 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/TCAJX2548890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d9cff32b20d099b1873f091d88c448e89e58dd7d5d259bc275bde23966d4ac. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:55:03Z), 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/TCAJX2548896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283e2892b61cdc844bfac4bc17d51f81b958940689ab4d0861f00a6796a94d3f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJX2548903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7263bd87346b14dc45b618911f3bcdbecd933745c0fc9fa5440dc3cf48c99db6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJX2548906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0534590cf761f7ee8417b20688ef33a62362bf27d66b5db4ef3c5d0b9e22a64. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:08:14Z), 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/TCAJX2548912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d73ba834da1a2464df636267cb0dca616139c1677d2ba0597b26871d49525b. 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/TCAJX2548920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c3531b2df9ef11a4b316e4f08f34cf74cc767f33db3749e964c9c03c91e3a3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJX2548932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe959180f2d8f653fc8fbcb424e08342a834a062446832dc05fe89fe6fba434a. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:22:26Z), 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/TCAJX2548936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea951c39a81ad13b3f02258c89ef46d3110649faad9f0ac744c7b6e007705a5. 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/TCAJX2548941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0774189286a5a0bea5f4824f39cacd4dce57950c69817af19a6aa27b41f1fbf. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJX2548944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd021995116c568d1c80932c4eee9a9515cc09515e770a47f727b3c1a317fa767. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAJX2548945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86124818b96213be9bb7fdfd7543cc223de5f9eddddd4a4f6a64e81bfa793719. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJX2548949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa494b5b788ecb3e14470860ec56a7ab478af80b411a8fc42e27866213b2b951d. 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/TCAJX2548952.