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 0x684935c95ec5e3dae8a98d74d3ffbe3eca87f135b058d6d82311adc078ddc881. 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/a42adb0e-c9d4-40be-a840-15d54cd78e96.json and https://artists.proofprofile.net/proofs/artist/a42adb0e-c9d4-40be-a840-15d54cd78e96.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 0x97d0f7bb3d25d351321882a60e92fc3d5ae23b8271b15df51f513166ea5902bb. 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/LTA490000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b143fb59a567c983bc2d9e20aa77cefed32749126488c55f43d91e395033140. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/LTA490000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1367198ebc6b89445e4b3f450b5a2f1a65d7dcb668113dd5dbc392cf668ed72d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:55:22Z), 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/LTA490000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe487df2cd1811dccc594cba6f770ad291e5a315ffaa7962846ee57cee7af6a2. 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/LTA490000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a73f41b9aa64510a13fbb63bd5f16d22a31e347bd59cfd0cafb7b14470fab72. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:19:01Z), 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/LTA490000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810479ff1c81dba7a6352731fb3b18c1357fa82cb60711d9cc9fd998e62b1c2b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/LTA490000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ee722ebba12c4d082b7e50fb16a8a7e84fe2b3cf68a52e18ee683cc7702c9a. 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/LTA490100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08aaf83635893d122a44a23ccfe9373471f6fdfeccff961afeda82dac900731. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:20Z), 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/LTA490100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26563e8af0b1efafbbe6f5753ad7df8de80b411cee50e81b3dfc57a55c596e64. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/LTA490100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0112e9f843f24c8b53da1ce940122e5f50ccf7777141ffac82fa2aa236d7b30a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/LTA490200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b49c5be8667c86bfd54c803a66ca50a85b9db565976840b817f8a4cd468a4f9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/LTA490200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d3bff7bb8a38bb1101ed01cfbe1733806c567d0595ec3e97d8b112d494a861. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/LTA490300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4971e593eb2a16d1db9a113a8d9c904afacde02893b5d19f8dec70a64b399ec6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/LTA490300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5887042aff67fb8fd3ede90c1ba36ba7fddeac9db9fd40423f0500bf4cd017. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/LTA490400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9d52429593dfda77feff2b10522f5b2190d58c6d9fe387a3bddc61119d0b2f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/LTA490400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20a38cc1a406354c5dbfc1c1c13b4ea70c6d69e53fb8baa0ae645187dd891eb. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/LTA490400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c2ab5e9e54de5991c5510dcf120042d43276dbf4c10c5948fe20fcf2817530. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/LTB132000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927aa7d442c4aa490921fa34f341f435319f823f10debe45ffb1ca3e2c1191a1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/LTB132000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ac6c7d3296e5b6c8307c7ccb6b1562069a365c13d7d8934882f94105363c94. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/LTB132400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03abe8f065d844135ccf1459d4ac9099937e104ea5ae5f7dacb8552ae1450898. 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/LTB132400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff845520843ed0411f99a5b066ba02048670773e6db3615a9e866bdb62c4a85e. 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/QZES92261824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124e7469ce7ef5215211761c208c82bf04d0a5072c8b51759e6fbbdf3223b15d. 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/TCABW1405105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ec50174d7136f286d8dbad8dbcb01abd940b147bed0443f6acf46f7c85a66d. 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/LTE572000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ec50174d7136f286d8dbad8dbcb01abd940b147bed0443f6acf46f7c85a66d. 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/LTE572000005.