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 0x6f444d0c46bc33cd258fdeca0779f8910fbd96a7cf009d8c30e9613558d87ca9. Chain 2 (Bitcoin): anchored in block 954025 (2026-06-17T00:32:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37500605-76b3-4cbd-8a4c-1cfe2fb42d1d.json and https://artists.proofprofile.net/proofs/artist/37500605-76b3-4cbd-8a4c-1cfe2fb42d1d.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 0x6f239a9d28e44e469185603ea9653bee1913cdd842d068da85acd8dbeed805fb. 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/BRSKY0401520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1f781516573aabf3d4e20c6f65b14b3313cb8042a37981934e4918d9cfcb21. 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/BRSKY0401521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c2b5f7a02ab24ead2262c604a471bb554cf19dc2e1328b8ed4a7be29b4fe1b. 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/BRSKY0401522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a427408b5662a7223d505e5d9b8af3a77495dc9a73a3cf310b33497707fca9. 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/BR03D2500854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad436f02b60051e70ce3bda304cd7fa94dc03973a3c38ac54249b77d0e95f91a. 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/BRSKY0401524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd435ae34ccee76bc81281a61d1c85dac0f7e464c7a36034e78d2aa20cf27443b. 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/BRSKY0401525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cea74013c1569a99b0ae983d74309eaf70d3320fd8eb9636020898fbcf98ab1. 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/BRSKY0401526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5964e0051549bf09f7846039de298efafe8855ff3fae9f32fb331aa3fc64c9e0. 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/BRSKY0401527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e8d21d382c24d27482dbf54060d45ca3eb0025233f48afddfaab637cf5cd83. 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/BRSKY0401528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54357b6218ceda274f1404d77d377d091fce117dd10491ab57089dda8f9513ab. 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/BRSKY0401529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6681aabfca09dfd7d7adbcf1bb5f6081d6681ae4b94567c8cf0c247dd55c1a10. 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/BRSKY0401530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3810f2c98c0fbc002ad2eafb7a23f5aa6fc5c5329346246efaadb647441b40a9. 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/BRSKY0401531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9585c8173e7976fcf383bb09aa97e1e9bc02c230f4b201b812983666ed269575. 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/BRSKY0401532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddc31b03cc7c107f4e5f098fd6389c8c0d4f881f191f99fb4da779bc0ab756c. 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/BRSKY0401533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9e2fb8b8477ff66a290fefd4233569f3de32cbe4963ff6109c5e3eeb92a10e. 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/BRSKY0600460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9211dd28c36c2502f049a78224d652dd1fac50c8cfa8e5c1456e846cd34f5d. 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/BRSKY0501601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb847ece20bcdc298a2c31453f2f04f82f6acbbcb8180cc89cf23684308006b2a. 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/BRSKY0401400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7483de0a778cdc6bf34bdd3fde20f8487564278b1f7a7dc16a83f2bc1cb9f501. 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/BRENF0500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039baf372c6ce17961e910d653830046c507b39d673f01face152e396cf4001e. 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/BRSKY0501598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ed84e4797e3fc4969c15773e631330e5473588ffb0ebd4e4a7ac887bcc10cd. 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/BRSKY0500675.