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 0x9d7939a40129131d63246aead45154b00d6cc672f97d02e73a76f21cb37781ee. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5aa5a68c-36a3-4bbb-9650-b47bee8f6362.json and https://artists.proofprofile.net/proofs/artist/5aa5a68c-36a3-4bbb-9650-b47bee8f6362.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 0x50d648bf36113c270e0f5be7a2bdaada982456b587b741f192eb7aaf642e1cc7. 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/GBLFP1820176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3b37e24b03c7ed26a8899f46d23a1427583f4509b5207343210a3303630d2a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/GBLFP1843382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e69154224dac68396b2702b6bf8b3886a58c2434f16e1973ac1c0ed97b7996. 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/GBLFP1843387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41638bd663e290ce9948caaba71e2a5f4fea70c0565f57f032370c17eca1d405. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:16:54Z), 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/GBLFP1843391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc987b470e80dc19846b2b641f42b8bf1fae047022caf40d8af97cc295aa55edd. 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/CZH441900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2611fb128d3b0bdf1f3e28a41bcb6db5fa845986d9dabcd8b001dd18963b3a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CZH442100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5afee3a1b6019f56af2d064c7c91dae5e0df0ef7829c7d71b198933adf0d3d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:06:45Z), 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/CZH441900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e766eab7cf9a6e8f782726417902dc15f832311aa45f0bba3a4c83f8bc1940. 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/CZH442400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e703cbf6ec81d54e9d0c7f867d68638722c32ef2bb437dbf018b71df252862. 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/CZA162401965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92a030b0dbeaf2507d4139961805b57c2271bda047f5132e633a780d260602f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CZA162401966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939f24b4788ff48a4b2453f165270cd9d5c5c356154575659798eb99dff4501c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CZA162401967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff84d8fb045817ada0a27c61a0a3d6fbc3cbc1af12983b7c4b62908e49a6f5d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CZA162401969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21f349cf60f652d4cac2087abac40fd139a37c53c9bac054c7d0a8d35f551f5. 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/CZA162401970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf0ffbb9ea605c07e6512af81ba698bb503eb58bc05ae31d8551f125373d8e8. 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/CZA162401971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c490438377f3207da1b99bcbfffd9440cbefb8fd263d81aa6d9dfd501755ea. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZA162401972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24075130dce586605f7fd268f09afe951585c0e30febc101d13ed87cf59ada16. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CZH442400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850757f2d92c9bed360490555353882f97f73f0c4c36e6164d73598fc7526075. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CZA162401785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a62fc3edc2675b7975f8ff676c5b3bb571ccfdb0a4d1f3a9948dd13016bb97d. 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/CZA162401973.