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 0xe09914746a69b8e05670703e5ef87ceb2e575c07d2ed2421d5e02502905cff60. 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/a38c8e34-cc2b-4a6b-bf4b-208b34ac4aa8.json and https://artists.proofprofile.net/proofs/artist/a38c8e34-cc2b-4a6b-bf4b-208b34ac4aa8.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 0x65d4cb8351f98f2cb886e71a6af4c622e3165c5bd3ea4784ce7f89ec920c5c6d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBJCN2432201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912192bf1c85f99ba40c9e0064c73106132c1d5673d01c15452580fbae172d71. 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/GBJCN2226701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff9af6e8e1d6cea1c018bce3275585d6832e74088b2bc627c7ede7317d89a64. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBJCN2432203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a8a1b02dbd9efe2399a04f3e496460b751e13b0d1717acb849a22eeac674d2. 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/GBJCN2329701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8778bc9be1dafc5926684b2a0f494625ee5ed839ad24522fb17e511f5ed634. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBJCN2432205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371b443f67b0fc0cdbc0408b3277f77fbf590aeb0f0472f65697ed469a323417. 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/GBJCN2123101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe186935d201acbe7ed3912920f86b95a0186b78777b9c241955d92802a92ac17. 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/GBJCN2432207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc92ea8509511755da14b7e51e90dc88bcbd8c415359e87535c0bbddeb793c3. 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/GBJCN2123501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8e0f741c6d7c7d821dc145496b87419fac9ee72c881612842536b266df8149. 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/GBJCN2225501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519d085fc1f102a450d2ad4d69aa1300101fb2ae6ebf1383bf48a55544e12bed. 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/GBJCN2432210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bbb389a4e7eafbbfb854a8e0d18749d6b2f391303b484cfd8bac5ec150c989. 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/GBJCN2329501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe532b0a75c40a42709055bec3dbb79a5e580ca98124cb723d87315390782403a. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FR8Z11410642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2298fb085d9421ed9e3bd6318737bbfaf4f90368e0d1147fb070f09ee004fa. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBJCN2122001.
Electro Swing Party Vol. 4 by Bart & Baker : The Cover Session
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abae6efc583b2389465335fe233532de513f404b911a70b4d6b2553a6491410. 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/GBJCN2019914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c71877380467ae7e8c1fd6eb38007add9518682cde67b666f135252c1e4664. 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/UKW3Z2102265.