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 0xbc7ba4331d6962d1cd19b12b9002ef79f31f6a7faedc5d50b4a15033b5df7390. 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/4a5dbecc-86c8-4413-ae10-036c60a6521f.json and https://artists.proofprofile.net/proofs/artist/4a5dbecc-86c8-4413-ae10-036c60a6521f.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 0x08c71211b624d24770024ac526f1075cd38e662346ccf0bb66aa94ce3bf8e719. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:07:19Z), 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/TCADA1751837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ab96e84215e8cf7390c88e252644405d0d0d6c077882653c6412ef2c53a469. 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/TCADA1751855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531ad8a7f928554506fb58699fedfe6e001d6b56741deb2eb227248cb0967c59. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADA1751866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e74f7400a589fafee6840fba56266d41ca19254a64fcdad3638f23deedd5d9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADA1752459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d8a447df501f936cb3cb230403c87f0513f207bc5238fea2439d69a17840a8. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCADA1752462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16efc2ce44cf6b455c7ee2f962faa12975b4636b5df85f3d2e38f96cabe63a81. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADA1752463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cbd6c6c812597a65ef64f736bded4d30c2e053e583aeb7e54596691c053f78. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCADA1752465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8c208cf18cf57712abc51e51ef37e008fd9b3a9ee3dd44b2522563ae7b46ee. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCADA1752468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93398defc8764c3cac26a8dd530eae5a29f8b27ba9dd7f3008249c35d07a7e6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCADA1752471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbdafcdd80c91872d2360d04ff8fd11ba8551c1e6cbfba46575e3b0cf5fd876. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCADA1752472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839870ffbbab957116266310ecd6ab0c8c0cebab262d0381eaae49f3562884c4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCADA1752473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89beb8ad7d139ac54a4f1a978bdc212e3fc82b45c020f01acb43b0b6f1e64a1d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCADA1752474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb224608bae550ad7201c20a6a58fffda84caf3b9fe59c984cbd49f49d6df658c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:01:32Z), 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/TCADA1752475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea778222218e3b59e515b6819be930b8adeace42a3fee5b471be2f7ad5058e8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADA1752476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b3de985bd9143c018eeb87c3805fa1f2464af66bb95069ca270c5c3d6948c6. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/TCADA1752480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb44713d5b8477b145a006d23b6e77d12862a7f9eb04340c70ade24846e61746. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCADA1752482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414ff31f00d42592b9cd282b6d13df1ded014c56c128d7cb1ea0c9c1765c4698. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCADA1752489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f11126e608ee922e2b0ddae794d26d764fe1e9533b9e40ec5d5499a19394b1b. 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/TCADA1752490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e3bf458c8fb7ba269ad361a62e08c524fc1d02fe9a0b506dc6086094a71119. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADA1752491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c62e4711fb8e7ca3846741828583aa334381d33b98c22cffbb34b642ac9fbfe. 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/TCADM1819733.
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