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 0xabc1b178761a348d5369999895262f2309bb2ddfa0b206df9353dd8cfb0af134. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55178c35-17b3-45f8-88e8-aa422f68af3c.json and https://artists.proofprofile.net/proofs/artist/55178c35-17b3-45f8-88e8-aa422f68af3c.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 0xc8005a357081ae88ac2ec7bfce4365a612d63f9f7aec52cff9a62c55eea189c2. 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/ATP570532160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8a7852c7e58823b75702d382259d0bbef3c4cd20bb1f06132dcfe0494d6321. 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/ATP571444010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c91c52453d23ffc415044cdb35f80714fa7d33a3c2f544e56e5f8c0ff0b1bb4. 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/ATP570269070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e714e29ce2ca0340a7b283d74fe1bdfaa095ea8021d7c58c2d8a1080854424b. 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/ATP570871030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a74f709319af7a8a9b2e2f672fcb8b670b30b0cc4a928b215ecb254aca6092. 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/ATP570871140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2c15449ce223d6a6dad6e74b00b834f2624298d11a2706ffbb3344afa85c05. 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/ATP571096010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114ad13c385bdb85cbf1892fc3c1f2889b78b6fff5815db65816dd7acb377f09. 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/ATP571096070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34bfce0d0db846c19bc20304151dbdf5c47538291f07b99cdb9a15ffec816e9. 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/ATP571096080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd25bc63053f7c6f0b546d5d9e2e86beabe8de32ffe1b548d35108e9548fc145. 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/ATP571096120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2815f90cf3966c8d3ea0a519f112e3d00cc45333c2ff33a1059e4f35420dfb2a. 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/ATP571096130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e13f6adc3cd752ba4022d524e6f2f7cd232859b05b1bd1664adec184cb48f03. 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/ATP571096140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7fc52d22ed8327cdb0f4c0f3f3176776cc35edeb272f2f8f734cb66d4b6c1a. 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/ATP571096150.
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 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 0x59e3fa374841f508c78ef3f61de08a2b0aab05fdf668ef7685cab15b0e8c62c4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:51:18Z), 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/ATP570394140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3599bea287a92c26fbcde200047a5644192a011e757e402d0b0eebf281193d. 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/ATP570143060.