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 0x7a56a50b58e8790ecce5975597071ca3ece334e95cfc47c031d77e075788462e. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3bc8ae6-a1ff-4d70-887c-822c1145a386.json and https://artists.proofprofile.net/proofs/artist/f3bc8ae6-a1ff-4d70-887c-822c1145a386.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x294ee9222e3b3cf8aee86b75343a8eb39385e77fa467cb26f0e00ae7b9a2845d. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/GBSMU6917184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99afb8ca1d75c10853e6f43b5cdcd1f11ab0462dce96074acf4b6b9a527ba093. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBSMU6776058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec113519d441f638e85aad28a0b631bb45a62c61cbf9a08a8291e591e270d4d. 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/GBSMU6694918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2fa778448c6c631abb13976047d2035364cae57e5e41ff1c4c4384aec8c806. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBSMU6694919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d2bcc2a5cbfd5ec8ea2a4477518e3a2e806219d106ebdc1cde517ca6c32f8d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBSMU6694924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed070cf0be97d96a2219b1a8ce891351253863356748e99d498b3d2823300ab. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBSMU6694925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94007cc6127a16e2784a54a60b1b0addd625c906bffb61386ef6916d94dcfa4. 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/GBSMU6694928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731a9de9c9f7d6ebd8a50b5045b41ddb0502447fb3c615db94cea790cd9fee8f. 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/GBSMU6694930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9180ceedb38c3d91761799980e83dd98b495deae781f5fe606d14e998d0f03bf. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBSMU6694931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee4729a443e4da2a3b70a6a1b7963a72e75db95af66f7739f76fdd06c445385. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBSMU6694932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f1c3c3d7146adb83cf04f09fe54af81744a214b994677e95b16bc9f69459e6. 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/GBSMU6694953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac63b549f8247e6ceda935740bbb0e7aadda54b1eed665a9554c84bf3861dede. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/GBSMU6694958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c753880250071277cf9c3a34b8c4e58898316d35518f2f3ee94212fa431fd0. 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/GBSMU6694959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2333027119490ee784c42d2c6b64b8ac3c8a7275e3f881dda2032c3acfc87552. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBSMU6694962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb277d300a7121f3d11699f28db70c26fdc94b6d49290baf4c4c6068f73a71010. 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/GBSMU6694965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05701707c3926212673f0d31c548d6670f88d7371791bcc1589730759e8b62b4. 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/GBSMU6648601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cafc2200c5c4d00c73cb8ed58205f92239300023d19887228c2c4765b118ff. 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/GBSMU6533765.