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 0x30a653ae0f697377a51fbc5b32f5fba9d787c3dc43e010b3efdda2006b889c12. 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/b2a1b306-d821-4723-8e06-caff5a22ffa0.json and https://artists.proofprofile.net/proofs/artist/b2a1b306-d821-4723-8e06-caff5a22ffa0.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 0x1b189806301683b9d6b7595efcad2bccd49a04d4175410695c4031364eb151b0. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZHNB2167044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070891756df0ce3a39912583d4ed80eeaadf1d626a90efee6ca5f1f5adb978e4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6K2192971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08e022ecc09c342516e9181db351c880bdcd18403bcf5d61ed35f5b8249a852. 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/QZTAU2186705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8fa115c10f41b19b61f64fd3e8cb0057a0f523afad739e5d48b727f85dc5cd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6J2211851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc721ade0a4e4bf53c58f270b701cbe7724fe9c5940d7d287d255d2ec00602f. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZNWS2264998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e31da325d39969c05681cb3cc608f8ac61e68a7bcc73132b567636027bbf214. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTAS2264207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8fa115c10f41b19b61f64fd3e8cb0057a0f523afad739e5d48b727f85dc5cd. 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/QZK6J2211851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc123843693fde0aa9fdffc9271e2bdc802910bb50270fc546e22b7daff7527. 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/QZFYX2329025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71984309822e163a0eb992a1857c3714f8ad8ab4ad6cbecd04cdadfb32776d3. 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/QZFYX2329026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e31da325d39969c05681cb3cc608f8ac61e68a7bcc73132b567636027bbf214. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTAS2264207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc721ade0a4e4bf53c58f270b701cbe7724fe9c5940d7d287d255d2ec00602f. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZNWS2264998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2101e1a399cdcbca8e19488c0c23fd241b440c9a388b7d9e11ff4ee216abddc. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFYX2329028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd896841025c2acd96bfbcd11a7874e5050a523d3a0ecd77d046b25da36682773. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZFYX2329029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc42efdf9cec605809d9a2121b694b000dc523e21043cb84309c3bfb8ecae19a. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZFYX2329030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f3c0d534095174ce168673dadb678438ea9359d449faf2ff955de16ad91b7a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTAX2370014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ccdb4d1904e2a8d130c71bcf560cf3bf194b7d3338467e708cb1c24ef58075. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTB52370894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ccdb4d1904e2a8d130c71bcf560cf3bf194b7d3338467e708cb1c24ef58075. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB52370894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f3c0d534095174ce168673dadb678438ea9359d449faf2ff955de16ad91b7a. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/QZTAX2370014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df0a8ba19a57029b6e592bea3c02265f89515562cc57103e71c5b10ef98749a. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/QZTB52370897.
The Funeral of Who I Refuse to Be: Ch. 1
The Funeral of Who I Refuse to Be: Ch. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05f88c96f95bbe0040ea3260e91207354b324781da4637d2f2a593562a8225d. 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/QZTBD2549845.
The Funeral of Who I Refuse to Be: Ch. 3