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 0x91f332028c7e19caafe9f398fda5e285a1e2cd2750c05bd6276b18f034ed918a. 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/8e343b1a-2d8f-49db-a21f-2e77027d825b.json and https://artists.proofprofile.net/proofs/artist/8e343b1a-2d8f-49db-a21f-2e77027d825b.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 0xf39af32355cd23e88b3c07295035cb292509911b5cb84f8ba534017dbd42fdc3. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:55:31Z), 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/FR9W11513291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093c4f053883827751bb3ef93128dd1d4129b54a39130793320583b328042588. 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/GBKQU1390622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bdd230fe855447097938e15d38661f39d820be877c078e43fbe675dd00f8e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU1390625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cc177372bfe0020c07ebfc6650d20640476acad4013791a8d9aae11a20c42c. 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/GBKQU1390627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbad9ab08a4b1f99a878263f586ca63c4141088d10e3e15ccbf255ec2dcadb68. 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/GBKQU1390628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c798787d55c659bccac2e1a6cf50afd7bb72cbd36c9ef41ba411c466f7b0f8. 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/GBKQU1390629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bcf316038e7d354aa84156c9d365941070ad7c49543bb92be28a576318f684. 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/GBKQU1390630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcc70270b8fa88f30dd4d5eae8b0de50c87bc404281ee8f55c5cb8cc26c5c56. 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/GBKQU1390631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f1f2f085b4ef082a31f6276b75d9be17f24daf4b1a05f0f95e2ca869328c90. 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/GBKQU1390632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2979c162f448ac7dc60dee7c8d8c919047b09feaa53d19cf5def51753e825bf2. 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/GBKQU1390633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf4805334f9ad237457e08dda4418720945607bf3d2d412ba71d406bec3068b. 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/GBKQU1390635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79764273bb7d946949ee3e5dcfb475a77c26f4b37fa7a58094b8a2ffd9bda0c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU1390636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c14e08f741f6dd0706064c9e4a17b47d45c8396df5442d2800de4bfccc74d03. 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/FR2X41694040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8ba4f084934a510b9bde69d932339c629c072f33adb5e49f69a3d8225c29ac. 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/GBP6T1900297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735fc41ebe7fa3f142c091cf7d75deb51cc782ea2a46d21aa4e552dcd3c0f4db. 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/FR0U91402026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e2d16343d5b481f092e4856c6c096b10ade87383f4be50814d5645be24e0bf. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBKQU1390623.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7f174bd832e922e46bbbec3618eadf12d2f94997d979fc779bc555c89c258e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKQU1390624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb56921e5da88f958b1d7ee82e2c5d21cb91fbd665e56328f1012fb45eccdff. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBKQU1390626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941eab57f4849cb27d19b3e5a48375ccf93caabf6446421cff6cb9eb773aeaee. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBKQU1390634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00418fe54a24db25cadca74e4940d0b7c3ebdde288758171784fd5b7ce3c7f79. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE6HN2408378.