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 0xdd2315c3a943c1ad05753c8ef880394cc142a3c6b96e0405be214744bb6047c0. 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/80852308-df3c-4704-a5af-8206f72fc3da.json and https://artists.proofprofile.net/proofs/artist/80852308-df3c-4704-a5af-8206f72fc3da.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 0x04815b115e019b253a08d34ebf67605240a763a742cbfa400f161d176eb352b8. 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/USB4U0400769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfc7b4ff79c8641bbae45f7352b53a14d49ed964fdfbd5008d065f2a782c4e2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USB4U0400770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ed4bab224cc5f12dd940ec5d81712f901e61ed9cda9568655dc46ca9105c17. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USB4U0400771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4b50091a626b4f4b5c582456b3b7dfac76ea7b0bdf3b537f59b5885cb382a7. 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/USB4U0400772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03237ced8acf6865167b5cb9d6abc035ddf492457fb514b4f19fe98dcf4eaf6e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USB4U0400773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d7dba87a464020f324a04071fd46f328649bd58eff4273354195255fcd0183. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USB4U0401033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ba9f695d2293fbb734ff8f24a2fe3bcfa5af823d22ced41d9c6c07e4de390c. 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/USB4U0401038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3070aa9d173f7dd764b7e484db9f9bbc744cf3b12ff1a3cbf4ae8a986b9e96. 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/USB4U0401039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5e1f50b6ce5f6ac85f04f033ad7f8e8d58e07d45e9312dc364fc4c9e1b0cf4. 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/USB4U0401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1e10afa23993619517c051ee5a82168069d47addf0fedd592109379403f800. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/USB4U0401041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943f24600e5cddc42c2829ac4eb986304e520811c806646221fc63d2a4bb585b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USB4U0401042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73822e176066832c56d92b49ef268eefdb5f66b9bc881e79be6663750ac0bc82. 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/USB4U0401043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ee970b75ae4898dd68ae96a82794095bc7d00799adfb1ce630f163b4130ab8. 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/USB4U0401044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6f21c3c85bf84cd6934c8cc1e23759e4e089038f2a0c8a0523939779fb100a. 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/USB4U0401255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8afec16f9fe29ba1336ab7e3845e0002d9ae8b9b43fd0884b86be3efa69b7d. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USB4U0401256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872245a779f21a413ab49bb30695d3a3018485b1c9c6b69337bb3c38ccf145bc. 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/USB4U0400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3a679d91e9c0a7a16f0fb961004e2687185db6ddbe892ad96fbd12a6b21c98. 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/USB4U0400775.
Sweet Deal! Initial & Eulogy Label Sampler
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a17ff13b4c03121e12f963aeaf5acb52cf1af5ba0b962a67bba9826340adde. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US75J0910253.