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 0x3af8816b0ac533a01eced209aa6874ac5dc3acd449fc9ddc13d056062e9baaa9. 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/26e9989a-f07a-40fd-aea8-8df9e98be9c5.json and https://artists.proofprofile.net/proofs/artist/26e9989a-f07a-40fd-aea8-8df9e98be9c5.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 0x79f7cc932cd18256a1e0cffbf22081b06c9fced1c3d2faf8b554ea94dc764b60. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES61970611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d68017d43ce66ea3ad16e5462f4d85788d735262809bcf40c6e8a51cef6c23. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:28:55Z), 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/QZHN32179742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f073bb0daa0af5609787140b2806417c0e16b964be9ddfda35a5607bb5ca0c. 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/QZK6K2130103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6790a78cf07dde59dc8f7c84030a01172fb76fef808df221e69492779bc5667. 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/QZK6K2131318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc28c23f4d6a21d52de9c21c137e9ce115ca37454b1aa1df8bd55752f23e5ae0. 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/QZK6K2132683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6a4770607fa36890593e5dea0ecc54b88eddec3996634d38951a73b11bb4e1. 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/QZNWX2171055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760b01eeae8f85c4eb380da4a0a8c8d9a3c477f8f20300cfbe7fe29987fd144c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:55Z), 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/QZDA42234965.
Come Thou Fount/Amazing Grace Piano Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a069909d8c95f831f7098c34eea4c0f180b3a757ba5a632d335f8e29fd783fd. 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/QZK6F2288803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ad51ff187f25eedd705a33ed7cc19de2d9c29fff928bd5f5e30fd8a2fc0e26. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAT2377448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd1118ace0ef18b6bc1aa7dfe0fef4173fb6efda3ea01eafba49cdee0b000f7. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZDA82425902.
A Poor Wayfaring Man of Grief-All Verses