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 0x4eb802320d6f13ea41895384ff27aca61356dec470a2086d74545af933de0e87. 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/4d12dcd4-6ad3-4175-96da-e65e8b1f03a8.json and https://artists.proofprofile.net/proofs/artist/4d12dcd4-6ad3-4175-96da-e65e8b1f03a8.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 0x14a5c919c870edfa78dc08bca664d13751eece2eca13a1f9b6a249a42063b289. 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/USDY42445439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637617ca14abd0e9ce0b96a4e98df5c0366ee6abb2b1e1d51509eb634a5bb232. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USMH92305467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8919512f81a731a0bb383d9401eb55687ad6c682fa65a6d094765ae2d381461. 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/USHM22289422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b96c75a52b59b479a373c91a893153141b2bb897adb8f11908de3889ad2e36. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJX2087272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba0a08a02ca0da477d64d1987901b4dc5b260a44895b299452ccdbbad8637eb. 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/USDY41902465.
Byebye Sayonara, Nunca Sabrás Que Esto Fue para Ti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ced835f855404b442c905e50035f7e237719929ca1e42db392b8e2b886bb9c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2022081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3740553f49a7ca2d86188656b8417a9bdbab82c2d2dcf03d2915435b57de2bc. 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/QZHZ42039264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546d3eac2dfe7aa1025d1f8d2b0684595cc9ba6be500ce32cf6122bc9a1b7464. 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/QZMZ92006339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4517a78082227c54789d91b930d9763abc44dcca52b0d8aee85d4dce5c5e2bf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2110084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c84ac8f3c41c60de03efed7768f45f95eec5753274ad1b44b555b4a7705c70c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2171322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93ae4e5ddf42cbb7a4c3ee8b4efaf13705766ac53320ae97d179fbb59c6460f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ62172795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c54e97120741172d020d01449c591ada0e99f6ba3c8cd539c3e112be736895. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2117048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e272cdc21486837cea19cf682917c19cc4ab461a123da76181f8c56282ed07. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTPX2189052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb193068a194fa521012619e8449d4d1f312620500f6efe921d066e466dd5a6bc. 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/QZNJV2041785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b6d8bfd41ce226004a1a2aaf69a603ff4144f3284d9b22d923a81c1598f68b. 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/QZNJX2178013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee948318ee996e66771e41b55db7b04386fcf7f101b6bf39ccb25173ecf6e3f6. 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/QZNJX2178014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362fa93fee5340aa571c5e0c369778b77ba0be6d720aa7859c6b76f2cba6235e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2142950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2663b57d7016792841efc108204c56d057f691c8e82149fd6f564ea3fca3057. 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/QZMZ92134635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e3404f44a770af3260a208b1b4c405f1f57dbbc16d366fda65b0c91cb3f900. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJX2178015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b96c75a52b59b479a373c91a893153141b2bb897adb8f11908de3889ad2e36. 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/QZNJX2087272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7678caef5452878fce6679132a959437280cb7dea3469c98c307bd893252ec6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5AB2169585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3740553f49a7ca2d86188656b8417a9bdbab82c2d2dcf03d2915435b57de2bc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHZ42039264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cb77ae93283b0a2da96cee50b8470f98a6cf48aa17a0851ed83e07cff689da. 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/GBKPL2164947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656a1a691eb03ff3fa3a2a9cabccdb65ea1818258c1f8b6053ea297988b9eb9c. 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/GBKPL2158129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188600c56e9bae77219676c64d2a098676fd3ae0f5b39295a2ac96e73cea63b8. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZMZ92137736.