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 0xe43a612259d473c4f985cb68bc47b0fff4d0c073582ff7666942d9a3634d547c. 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/bb5036de-fe2d-433b-8a6e-9c23c8f54213.json and https://artists.proofprofile.net/proofs/artist/bb5036de-fe2d-433b-8a6e-9c23c8f54213.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 0xf9f844807aaadbac22311dab3277e6a9aae5d492b384fd14b2ce16e22c7564b0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWU2393153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006ec1d35acb9b4ae1a87081fd88af8afaae24c3cd2b087d4837216cdcefa3f6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNWU2393154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d4642d7f6cbd97824f20ebe33e3e459c8351d152b960e4dfa4aa64c696f1f3. 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/QZNWU2393155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc4149466d7bc24fb0405f8ab763826ed71088d116035a0ea0df6eff4a4e184. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZNWU2393156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb592b554b878e58e79191c8807f0f787e6ef793e70e908f58907dc4995b730. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:34:24Z), 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/QZNWU2393159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce0e4fa852fb7a9348c6801caaca4ebaabda24ee5890ebbeceea242f6e00eba. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:57:56Z), 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/QZNWU2393161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3b3b6a9c6faeeb571c4fa9d62a63ae9542e991f80cc9333893ef3a8ec8d11a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTB32379803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca428e448e96fc749b624b849256ebd0fad12ce516b3e1aee9c92825cb44f13. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB32379804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de9fd84b9b5df4e665bc59108806aea9cecbc1b6d6f5cc95fc6e2e43e0fe6ec. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZTB32379806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162dbb03cbc4a13b6d70a90e976f48bf92f3e5e04f31bbf09d53f4dd834728dd. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:08:38Z), 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/QZTB32379807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77aa00c27186f9988b209e0979d1e8248dd04dc060f0aef8583df9bf69739738. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:08:04Z), 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/QZTB32379810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302411e7194d81979b4786bb70fbf6170af5cfa11e6a5f7cfa68f63fdbc0fae8. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:11:51Z), 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/QZTB32379811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb227703a7b624e16bb0025f97d225cd09010bd3434e8ccce244268222e0b18f6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES52463347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ad08b49b4309878d2f9860b00127a40f451245f549db0d2ab1b01feac81669. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZZ7L2404918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30797a0ae8b35a76f001bef615ba49219511016874e976de0b0b657398664cd. 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/QZFZ32500459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde93e36557aa1193bcdf352cc7cbf8982d3c18c3ca3d6324f4c3ac9d894f2ffd. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:31:17Z), 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/QZES52512035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfae5ed5da5d89274205fd590f23116f1d8144b8b730b0fb475423c268b3f44e. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:17:30Z), 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/QT3FH2544415.