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 0xa7d60bb0c4cf9cfe916b64b1ed45dc467c071fc0fc466022e71b45a8b8b05d59. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34a1d19b-bba9-4a94-a7d8-7ce3f5eebb16.json and https://artists.proofprofile.net/proofs/artist/34a1d19b-bba9-4a94-a7d8-7ce3f5eebb16.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 0x0734f2f69e29b30b11c324b5bfa143935a9287d11878f8f4c731eb8150eef87a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ATP570394010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75af57b2565f98919260b65467ef49961ef86089eeea230fc86aa4601014fbe5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ATP570394020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c4e7bb27704279ea1976968f6cfb13e68ebc27f4f55058e1aade68d691b2db. 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/ATP570394030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50db11a009959790c7f2e1afa2484837c7c7639bb5ed9b9b94ae94e255e9eeee. 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/ATP570394040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2664ef312a089f3696824a047b8f77542c20ae85711e080a1b5398bf9d88e3. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ATP570394050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad733205cfa3cd6aff29a6205a2b91ab23ba3ce09ff242c724e3e96f6b58df1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ATP570394060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9099d0b385c1912f7c1f82eaa3bfd2f92014811e84c655a4a81dbad49dafb539. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ATP570394070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c5e7f6827172924c847ef3b1772e805925585309e90a77bb58a9a7bee8c802. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ATP570394080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7889ae23be6f58260ea4f89ad52be17b63a5342d150c06a649ad6cb7eadd4815. 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/ATP570394090.
Hymn of the Highlands: III. Strathcarron - Sword Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31eda15ac828c2fe329c2eee9c7840a5137f05d4632b38f32a7fa3cb529b861a. 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/ATP570394100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1065e5f89fbb32c22b307c0ffe4b69cf6ee20dac4daeda7a8772541b53b05ea. 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/ATP570394110.
Hymn of the Highlands: V. Dundonnell - Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5937ac3ac2d5eb67597dd8cd9eec356fa74be979341f4bbfd916a064fa57c892. 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/ATP570394120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46acc2b284c578a858f59c23363505c23d6a68196db0c9a93bb1f75ec1688503. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ATP570394130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e3fa374841f508c78ef3f61de08a2b0aab05fdf668ef7685cab15b0e8c62c4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ATP570394140.