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 0x8723ed6140ab7ef0e96072df1bc9af7ad1e48fd1e0f75587bb5d41f97d435bee. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57d95db1-0ebc-4c06-ae9f-f5d2f77aecc4.json and https://artists.proofprofile.net/proofs/artist/57d95db1-0ebc-4c06-ae9f-f5d2f77aecc4.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 0xafbcc6e7d0adec9362b67ec34bb0f87af35379a174be9a6e2ea3fd83b2ff375c. 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/QZZ7L2468570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3861b0b3a7024e18715eb894a0f6d9babf438f5d9a13c67a6f3eacb0cd7f8a75. 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/QZZ7X2468570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8386e28d0fc4b242eea340d44827553e7cc345ce9b0829879b64cd40f30191bb. 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/QZFYZ2539944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476af8034998d27f6231cb65796bd358365fd352c335f9b46bc2a170e3e6bbb1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ22534340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78da910b3fb4c77978ba52b8d0d0cb86227e5c6dfff1b8cc2a9b0b2cb7fdc761. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZFZ62565835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06c1228b9f4f5d071c44b0dda322c2b0d60646672a506fb5cf81a65003e8bee. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA52516220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899ed5106230e5fd36f1c6d465e0167b593283a80d5bdedeedf39b1af2f0d6b9. 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/QZES92541268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7624e5c764c38a2e1cef458aabf7275be0c28e61405740d880eb8a8b20ff7606. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZK6Q2551884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc19b5581c75a3527f74fab6beed917961efcec8f17221ac96688ecc34ce799. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6N2521660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169a00efd3360299362e8c3f87bf06e56249e2e4f39ac3d2d253fb8771c4abe6. 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/QZK6N2521661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a72e7fc07c0c918daecd415d90a13be7572da8f2eeeefd1764c6dbe6ae42076. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:59Z), 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/QZNWT2517085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25779cf7778de6c6e594a80bc4f383bf7bc7114a647b63cfb0cfd72538c6ae7e. 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/QZRP42578879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b40ac46e699ffeb365ef170571923a9bb0a3372ca5e609747e2e4973566243. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZRP52520064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc947c0ab165639ecbdcbe8a9ee83678654c0f295bd67d993b9f6409439c5645. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:50Z), 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/QZTAT2539095.