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 0x5e269f758068a81222cd6ffb418f60918971d9a7dd03849e12e00d453b794796. 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/08a656bc-240c-42be-a714-9dd8ffe9c323.json and https://artists.proofprofile.net/proofs/artist/08a656bc-240c-42be-a714-9dd8ffe9c323.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 0x141399b09819a1456812e10ab7ac4751646da5ea444b33af6b46a6dd492c75ea. 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/ESA122461831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927244f05ad46fe14aff281b623b35f1ae01ba1e910309f49b11fdd8ddb90ff4. 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/ESA122461832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f67dda0672edc046360180559a4c828e8865e86c70511f3a953f0685af85ea. 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/ESA122461833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798877fdd2a04c01ac73f32a04ecced6314ae6a583ed3975d36772dbaf7279a0. 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/ESA122461834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154d4bf8499b82f7afb497a165f9c024db55c547c5be5b4643a71b101f061c4e. 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/ESA122461835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fef0b03ee8604a7d84b722939bb0a364313cbf5be74fcd48ca4681f79ce0fba. 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/ESA122461836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1843dd5827f58c35ff9103f4ffa3219ce3cbfc04c5be2425a7a5ad683e06b3eb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:59:15Z), 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/ESA122462117.
Fretboard Fantasies: Peaceful Guitar Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d2d74ec916faf86514aaeebe1ac2a045c75c6082b84cdd2a67dc31af9201b. 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/DE1JN2463619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a63c53f507cea4808bbb62481dc4eaf9b20720091763654fe6e65f8a4bc92ec. 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/DE1JN2463657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8f0c6e6e5e72b615189af133ed96c12706a3c9a586e6f8c6205e1ab89b7b3c. 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/DE1JN2463742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501bcb1b50f363033f4c8738561577c984e5028c378c0a47c1d1573d88f2bddc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBPS85655988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce71638c5ccea0d2bc3c69f25c2a659f1cf5caff4b8f1754f76ecb9be7edce3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:59:32Z), 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/US5UL1010739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787d01f8282af252e6d476de2710845253f35be91e968e6e237db05015473010. 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/ESA011838864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbd7276e50000cd4982b3a5d9aaecb8085e1cfe7811afeccef79f8df6f9217e. 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/ESA011838865.