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 0xfe07bbca3a987a6299b5c9335134f0036ff72f7f29694176cc78414d0d87bc98. 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/bdf07d9c-eb0e-4f80-b27a-9c25528fffa6.json and https://artists.proofprofile.net/proofs/artist/bdf07d9c-eb0e-4f80-b27a-9c25528fffa6.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 0xfbf2be41e68eec128f677facaf2a01c26436264285fd7bcd696bdf15bdd8c546. 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/FRZ041800555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3c8b2d45e34e12d03b03db7bf1252b2ed42c68547660627ee2b6cdbc88992d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRZ041900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40125243f91edfd4d508fc5ff91462d5b1cb702fa2d812c0d43441585eea1bb2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FRZ042000390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3c8b2d45e34e12d03b03db7bf1252b2ed42c68547660627ee2b6cdbc88992d. 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/FRZ041900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99fd50712c0d07efb1e9fb582e3125fb02ee873b46296b4d1e66f1b6994321c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:37:08Z), 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/FRZ042000384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c5ff032c5ab8d9826497c285df89c221745e6222597d8feed22c8480551e2b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR8FB2408800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8babab6bfb51ecbbd851f9c0b58ef4273e00cdfb764fe71f75c495d2d7cc1075. 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/FR4Y92300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72791b67179b1e988620e504ac265cdc75d055ad1eed9fcb10ca1e22b24899ff. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR4Y92300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2587ad33dd06d04190984803dc4d27bbfb51419ee32613ef4ffdc02ebe97b70. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR4Y92300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c5ff032c5ab8d9826497c285df89c221745e6222597d8feed22c8480551e2b. 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/FR8FB2408800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde10cc4d0d2ba758bffbecf511fb6667d5aa1ebd8f5eae985293310203ab1b1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:17:55Z), 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/FR8FB2512300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4d342be47d9f0fd958af73eb0a1a9965ad994c62b828a51c1d79f31e23d170. 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/FR8FB2516800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68ac938cda77083252a8a9a9d59bd1232e9603d07173b0e792f06b1e2400fcb. 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/FR4Y91600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4cdc8ed6357f34af21f30b1b49ec2f40c65394b656b8faddaa09ed4ff6a26d. 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/FR4Y91600026.
The Meetup (feat. Tessa B & Beat Assailant)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7c154a3bffd0b91727b394b8949f40a6e403949a86eee396f3989f99cc53e7. 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/FRZ041800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4cdc8ed6357f34af21f30b1b49ec2f40c65394b656b8faddaa09ed4ff6a26d. 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/FR4Y91600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf47030391b3b5696adc748a378cde56372b657cfe816f319bb78512691e9c3. 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/CAF661900842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dbd22a10680569a307052617bec66abee8fe279ac13683562f7d3bab9b2611. 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/FRUM71700146.