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 0xdbab4c3657755b47421ae058606195dffab4d203bd7603717f11e9e98afb522d. 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/ef5613d2-3e90-4b2b-898e-359c77700f7f.json and https://artists.proofprofile.net/proofs/artist/ef5613d2-3e90-4b2b-898e-359c77700f7f.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 0x5bd8f17f3092e4a8bf298eda881c8e47065aa74af1cfde0b155c6e890be50d7f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/AUMEV2312481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7610aca17ecbcc38ee057b8be99b4fe316cc96bebd91d839909442c692e95701. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/AUMEV2330515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811c569640efb5a1682684dbee4dfbaf7310ded98199eb6b2b6f75479f063b87. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/AUGBT2332601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbaf5be4afc7bb03a8c026192844f732b70e25351b7977f97267e2e1fb74565. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUGBT2360755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71a579999db26f611b9e1d415453d8bd17f1dce3d241368ba149ee575495e11. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AUGBT2360756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5401153e93072a24c0e77ee9dd27335b762f1b1cbef26c72259d4ba4b5fc9050. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUQ9D2403036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeabdb59bcc01c0f649aeab41fff47befc5f7982e1761cb5b5fe343176dabb36. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/AUMEV2542448.
Feel It All (Willow's Song) - Berlin Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e5019f2ba29386b0fb4f144114599d06e69099061689820a9700fa269fb94d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/AUMEV2598795.
Indie/Indie-Folk Compilation - Spring 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5704f39a00cc99fddb19e57451b512d9fd98a53e4d1885139ae55ad7f99f2608. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/AUMEV2301389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7b733f5ccb2890b56a7b81ad0cae9a4b7a8357d4423a56d3cd58c39d6aceaa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUMEV2472224.
Best Indie Folk of 2023, Vol. 1 (Indie Folk Central)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86708042e5f0e81a2c8f8d2e2e43574f5560168554d3fb82108db8988c84386. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZGLM2349003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbaf5be4afc7bb03a8c026192844f732b70e25351b7977f97267e2e1fb74565. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/AUGBT2360755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e3f2ca8e61dca02e5fbb5baeca71bf651e25f3f027e84484a0b948683da287. 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/US7VG2438258.
Indie/Indie-Folk Compilation - Summer 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62567e9ec82c796888c6f1184753150261218a8e1b0aef1661081ffd46b80262. 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/AUMEV2330446.
Indie / Pop / Folk Compilation: June 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefb7db21ffb20a22a65de1028987a2903b02ba56ceb2d579a9d9805b84759ca. 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/QZNJV2320021.
Best Indie Folk of 2024, Vol. 2 (Indie Folk Central)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7b733f5ccb2890b56a7b81ad0cae9a4b7a8357d4423a56d3cd58c39d6aceaa. 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/AUMEV2472224.