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 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 0x5c19e36a0aa2321bb59fd9f643ee27726eb638c033bb01692499ae7040c5f518. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d591f1f3-3ebd-48e6-9624-8b5e19c223c5.json and https://artists.proofprofile.net/proofs/artist/d591f1f3-3ebd-48e6-9624-8b5e19c223c5.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 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 0x6556fd843512f38097996147c8ae22ff02953657ac32cdb97bafcbd002c357f8. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QMGEB1301210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a1c3823eb71202fabfb1c22289571e8850168d8a315822f791cb449098883e. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QMGEB1602901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd030c27f32ea8488e15dd6673f03402ddfd3285896e63c04555b43f7f66b96. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMGEB1602902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619a116968e8059968aaf910fa6b11a7b6c58476e5c21e742b97a062a69ff094. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QMGEB1603002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd67cf5c5ddde0e6dbdd7c6a301398abe04f2c56d71220754ad8a95be238776. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QMGEB1603003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82ba56e291bf4fa46dfa7658b98e3e5f0dc7b42c44dee7df4ea7cbf97f8c199. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QMGEB1603004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a87be197321ffa26d01096a7fb1be7cd635c30152fc1d85dd07f3da27e7c13f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMGEB1603006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf193cf01ad0a419c8912552aa09a22d4aee7476fb66695a15584892458808f08. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QMGEB1603008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e716fdd4e910ace47b4162c1c5f5a5761c1a4c51b83339babf8b39780d390a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QMGEB1603009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712636dee3c5b0339e4805c816b6dce76a71b387cfa4a7d9b1c5997c44660f36. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMGEB1603111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dcbfad015aced9715b91eaea0f9fb41c1c71b0000f7fe1a4d7899c359dc376. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QMGEB1603112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672eaa4230a1c997ad0accfd5297b868ba7e17110b995e0391e1d59a44af4a8e. 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/QMGEB1603113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a52b090a67492d3995c33f51b075ca13836d1c1809a0516b8127f6243818fab. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QMGEB1603114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70a0801944b6f15bbf2fe78a761b6abe7346aa03571abfaadb84dc0e1f7db82. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMGEB1603115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff52e6769103982c0dcfeb8111292112f80d1f934438d20c5a5b648a95134a4. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QMGEB1603708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc490a4491cdcab279aefdf89ebe7667be9e558f9766106542a3b33ddf9023369. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QMGEB1603709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4c2cbe39d22bff816f0df4717f2b18e2b4cbf3f6e4bde2faa40694bb332479. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ES71G1929321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bacc087a2198f26b4eb12f3605331040d8c7d4b738c2dbb2b69e6e226568990. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/ES71G1929323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd182d088389cd65ff5a7996907bb4ca6a05c97a09d6d33efa7933901f1f4db60. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6XS2202754.
Just Like Heaven - A Tribute To The Cure
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd182d088389cd65ff5a7996907bb4ca6a05c97a09d6d33efa7933901f1f4db60. 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/QM6XS2202754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1eecdc7a5a192243a79061748a8efa4e751cb08789af7bafa198d2195e207a5. 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/ITN601500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824aa337d6ea198c89c3102a3fc6191e7a6d3b7d8a6929dd03586ad890c70663. 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/ITAA21500002.