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 0x4de86f51cd8526cbc317bb079d51332340efb457c7031323c38fbb4c1a6a5c06. 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/47d9c6f9-57be-4046-a88f-cd5e730c0973.json and https://artists.proofprofile.net/proofs/artist/47d9c6f9-57be-4046-a88f-cd5e730c0973.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 0x83d0186f4f3b1761a57819ff3de9edbddacc475bd5f512cdc5ae8336b1c09cf3. 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/QM42K1705831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78049384f8086262f8c9fbc81cd0ce8b1431621a095933a729b3b55c31697dbe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K1735293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf53f9942ac7e9585451cb02b4c95f5beaac887b351d762c24f036d496e4d1fb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM24S2102700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bd080524ff07673f177eb4ff1eaf57616cbbae3ab21acfa94e53bfaacbe57c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM24S2202808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb0c85e0569fb7fecaa20f70d88cbc34c61a7df6f55836ccb0ec51a4c31f60d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX5MX2450343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc982f8df2d66e618a22b4e26cf49a577409d49501400af50734bf4bb91e5fa8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US38Y2401287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750678e05dc6cd2edc3b0eca08acbd779a27af43168c9f1c560e19d1756caf45. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2307943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdceea664a58017558a5018dda0118ace33dbb0c52b3afc4fc33ab2f0cd246089. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM7282366940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c05d14b0cfc2cf3cb233ae523de1b58247723d941fff42dce8da1917ddec94. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS642395562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2102afde5d090a611d2f22b0c880ab1a34a3ecd72259c2d93fd21d14f5187748. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMHM2360724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04517b1deb1444ea067a87b4222a674a62c59f8246213008833de5d972b2bee5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX8KD2292287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45aae41f196ba2cbec588137c9353c017ee38ff3a92daf3d7af9d82b91f818ab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM24S2200429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b7d827bf59cf6dac000e8d252bf1cfd5b79d2926a769ba0310fe0087ba73e3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM42K2291445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a0a68e2b42b6d55250b99ef4140569cc3329657948e5210f3f0594eb79f796. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS642105843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616b57700d11bd29622d362abd2b6184d72ba75c9e319bacfe8503e5ca064de7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM24S2103478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df232b89f373efd8d0798879f1634e40dc1a1878d0d57d141e49f7f654e0c7b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZKDK2120818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca04ff710a77c57cccc11f0e0a6f1097b5f11f0f6a240986b251a03d2198d3d6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM24S2008729.