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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726cd17f0b6e4480c48ff01377f85c0144f487cc9009d03577f08493944b36f5. 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/2c485dc4-ffbd-4ebe-bd7d-4e9430507e2b.json and https://artists.proofprofile.net/proofs/artist/2c485dc4-ffbd-4ebe-bd7d-4e9430507e2b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebce78ea6173e496afa168116c699fc7c822f196fed17dd7e4567ed28ebe0880. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA072132898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128fe6db9c9071c449f43ebff7b4a587fb8170f851276a9cc129f1917e3da192. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHNB2105518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf272104db510abd9782c9dc955c02c3e11094fd4890ecf8e06ffd9cc9fb78518. 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/FR2X42122434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1b08c3aa05ab880d164744278cebe189b65f7dc00bf4f496e8ca2400e43259. 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/FR2X42122435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a8130cafa3c6afd158110b0a598c8246b19aa23aad990e2ba090578494716d. 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/FR2X42122437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea09968c59bc0cb32bc5aa43879d47d6bb9e79a4c8c4bee59e480536ff5eb83. 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/FR2X42122438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbf1ee367aae686c1bfc365d8917bae009eb764b04626ebed93b847bbcc3fd9. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/FR10S2128272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf4bce1dac94565bd51411b49e2f6d6b42515746d26ae2335d41d4c49edbde2. 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/FR2X42122441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebce78ea6173e496afa168116c699fc7c822f196fed17dd7e4567ed28ebe0880. 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/DGA072132898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8569cee14bed0d81fc134927f31fbbb97d35839aac76c2007b4b21180aeb74. 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/DGA072181969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebde64137869309fdc9360011bba2dea2312e7b5e06d87e3e8a54936184ed8a9. 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/QZK6N2172427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191bd2cd85204ee5dac57361d0a1a8f5a8f64067e9027c235ea9b3cdc26aad08. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZHNB2105522.
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 0x1d4e29d9008cd06785740e235483e9ed82221c1e7bde8b67dece473a4324df31. 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/FR2X42122433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8e47e466efe7a5f9bd59acfdb6b31073ae4d19e8643c4ebea573211af8f9fd. 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/FR2X42122436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae461d16ab8d5ad6d0ece8a0756b9c90c98a8cc77e11ca56b7a7140330a4a1b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FR2X42122439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd1b40cabe567571ddfe2596d1b75513ef118df6b4de0f9d411daae775fcbc6. 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/FR2X42122440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa7d542a541512f9d48724ca0ff0b9b311101316c4e83c762e4552c639a7699. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR2X42122442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cfed2ee9210e63549cc55c8c58079d959be1fc3d5f3582270a563e34425a75. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FR2X42122443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5017bcbaf37becaa97b7c82af1e1a1b89b1df110a3cd24a9128e7182fbe9caba. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FR2X42122444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e09bb1986d4618a51a537ffdc717d9b3a03959d28d0c6ac2288933292491184. 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/FR2X42122445.