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 0x2e780d4fc8802f6c93da1a45879a2a0e16f9ca1bc689e0dc8a49ef09e8e973ea. 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/7983a70f-eeea-48e7-af03-17c66d0fbc54.json and https://artists.proofprofile.net/proofs/artist/7983a70f-eeea-48e7-af03-17c66d0fbc54.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 0x448f7cf1f91ad802bd2cf3f339bc030c7bcc01561bf2e2f797f3e0083b451838. 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/USFP71329301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dbf9be3aeb60dac1975dc34bb9564d1928abe1cf74fa28a9d9e8ceccc74a71. 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/USFP71329303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bde7ec49b0f30212b87474c587f0be8d4ca61b0f441816da57dd3f6b6537b0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USFP71329304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14869c1f67ab509909e9905dc8dbcfde813d7d22b47d9d4498fabb8d99940a5. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:19:33Z), 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/USFP71329305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0260efdcaf01fb48e07ef1e0031e531446aadb00ee1f38e624d093ca30261b3c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USFP71329307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eea187b26a39bf5e99877d512ac208f4f38388de455d0b07634d870caf3529c. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USFP71329308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3863268bc958277f05f4da2a2ceeab0d613537103ba0aaa450169894d58781. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USFP71329310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56830c2d74b7d0669346a20f4c248ac3475325ba3536baaca1ee5336a26e48c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USFP71329302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8330c0bfa9e4721b43a8e062ebe4cb30a4b45f0f9af4fb7073e1d0f010e170. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USZMA1400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab988ec9013bc84f3e8b5e8272d4ba773621afc0a85f1901b15724c335728353. 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/USFP71551006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad160d4261d2a41f1401aafed4a5f6445cea00914de15d1e09b25ed2d13fe0f4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USFP71551007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd2871b91ea5495261f928f6115476b6d2f1323bddb940d2216049f0ca9a87f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:24:13Z), 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/USFP71551008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26589e2895ae6a4f565df6250938962700eb8b08ad330d1ad1801a6c6ed243e7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USFP71551009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b830d9a001b7ee2d39adf5256f04d8ca1064f059e11e8ba1ade006d3132890d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USFP71551015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58405227b8048e9e4e45322f071fe354269683c4766b30188d83bb7cd653a4b0. 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/QMBZ92199877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cad0b4a0a71546a6f7d580a039586ee8f927421ec0cc9076775409537bc6b7. 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/USBQU2400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a50cc16fe826eca7f256fee7f50029150fe14bad12d4666f27eae3ac3f5e31. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USFP72484103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cad0b4a0a71546a6f7d580a039586ee8f927421ec0cc9076775409537bc6b7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USBQU2400189.