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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43b91189b1f69c39fe84df75148561ae7d4600b1f7ccbf66ed413bbd69b34b2. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c14bc5e-844f-4b0c-b0bd-fcc29d4419c9.json and https://artists.proofprofile.net/proofs/artist/8c14bc5e-844f-4b0c-b0bd-fcc29d4419c9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefe7de921ec059a19488a4c407d5617af814c88078a6cd1333caa801b3be90f. 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/CA5KR1847716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cce222ddb64b6339be3df70ef0aef1a3809a40c613cccbf8d648a7345903046. 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/CA5KR1904139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e023395ce604a83f480bb3e5065d27f6d2863ec595e868557209e518d03314. 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/CA5KR1926540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78039f54e7c40b8b487e6d29eef18cc2c5591f78b6661b431f01c157b89a7dc. 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/CA5KR1840281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefe7de921ec059a19488a4c407d5617af814c88078a6cd1333caa801b3be90f. 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/CA5KR1847716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822e6ba7adca1da3c2d6089b153504af08def5d6a57a7b1411d5972f96b40566. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR1843369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21982461ac7d3fc97b5d603c7e77e05da0928153d39684e5d9973abebd979326. 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/CA5KR1838152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78039f54e7c40b8b487e6d29eef18cc2c5591f78b6661b431f01c157b89a7dc. 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/CA5KR1840281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3db5f6945b5a11c57d84538649d1a4f53b1b1553efa14c9d60458e90b1dae10. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR1901370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebefe46fe142a61425a7c63ae9110da28d9e03f83eb42a21a23caf36a71b99d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR1912266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577b6c370dbf5d6dc818f1df77611df03013f4ff82be7b9fb0cafa3da238a1af. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CA5KR1839451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09233e55170f8071d1102a4513973be5cc9ac77019a77321c24f2ff1e343a1a3. 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/CA5KR1932914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb443334e9ae79a8694bc0d6379b18f4f40c3d3e03a336f8bcff1d5d5afc2f122. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR1832558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190444feb4f237865957a36e5de9e6002569cbef4579f7ea0af3ca1f3ecfd692. 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/CA5KR1840445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e023395ce604a83f480bb3e5065d27f6d2863ec595e868557209e518d03314. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR1926540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f92c2802ee457bacc196499f4fdb211bda66e6746513421ec18c318bf0546b4. 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/CA5KR1931449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26516fd3db3b728297cbf2c2c0a5afe3d9bcc8945e8b9d9407ec69e613b808ad. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR1833038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdd92ac308be21e84f76102b7081d7cd73bfdd6fe26f84f1cb4a3f5b1462142. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR1820693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26516fd3db3b728297cbf2c2c0a5afe3d9bcc8945e8b9d9407ec69e613b808ad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR1833038.