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 0x43c1bcb0f044d6f9b93561c629a3b1e8c192e48becc9dce0ed7eb37f1a123f9e. 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/b78da190-a55e-4fa6-bdf6-246402eca8b1.json and https://artists.proofprofile.net/proofs/artist/b78da190-a55e-4fa6-bdf6-246402eca8b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Amsterdam Sessions (Electronic Music Compilation)
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 0xc8d97a7c74614dcd3b0124632f6f10424bce3402d50cf3d3029c9730e73378bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTBB2349334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfb0f2a22cf3e9a615c6afd96e147ec689a543868a5be98a09e23473bd856d1. 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/QZDA62421035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d1cd0d7a6e2bb7261b670ed81e647b63a21a168d4a0b837974bb6852ddeec4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ7T2473119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d97a7c74614dcd3b0124632f6f10424bce3402d50cf3d3029c9730e73378bc. 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/QZTBB2349334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe95fbe796d63f46f5fa712b2016f338cb4f30e3d8da6367150ce781df164407. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ7M2428667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5568c4f514e0636c4411562d40eaf78545350bdefde2011640928bd25116ee. 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/QZWFJ2484818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfb0f2a22cf3e9a615c6afd96e147ec689a543868a5be98a09e23473bd856d1. 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/QZDA62421035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe658a4c2cc3e242eb545f46ab5fffe5fd8eca7b3a9b36caf021771cfb1dad57d. 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/QZZ7M2428668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6abb8bf0d4e4342a1d6fa40a4e14a0ab9164e58ee5117784ae21f99ab3c193e. 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/QZZ7M2428669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5568c4f514e0636c4411562d40eaf78545350bdefde2011640928bd25116ee. 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/QZWFJ2484818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328d48a000bca0919c95e3f399f7869a4b6a0bb1d14f2403b15961e18a33e520. 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/QZDA62479735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ce3b381c61adcd81a46479fcedaf425e5b57b19d0319bd0af2c370611d6644. 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/QZNWR2549483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f91819bbbe4c8ba3992d1f2162dd8a1e8c6673e6f17f5578aae02e500ea02d3. 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/QZNWR2549484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a2451e4128314ec72a9fab6cc8b46c453fd1531c67a97f8391c0c796f97291. 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/QZK6P2532692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7061d998a635cebdadf757c9088b986b3ae5b8958c8795067e41e2b4d5767c66. 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/QZNWR2549485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c53478d2fe8c7e51253626ddabbd102f88800d638e0e4a9638ba2efafdf118. 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/QZFZ62513853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6aebee2a457e0ba173c684b34de90faf0bdf5f806ead31c4a12d2abecb23ce. 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/QZNWR2549486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411188cd01c10fd8a823768011230cea6c7ac560ccb48b43cb3d8b7112ddd514. 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/UK6BP1700163.
A Little Taste (feat. Jessica Jolia) (feat. Jessica Jolia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67e1c9e60957805363584d1d48d03d8b7e33c40712a9b570cd1ff6fa4fb85a9. 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/USUS12100513.