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 0x6df84bfa519ad149210bb5297555c8789eec893d74b89cd8b936d6c7f56e13d9. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52a5f775-17e5-4079-97d6-dd1497425d3a.json and https://artists.proofprofile.net/proofs/artist/52a5f775-17e5-4079-97d6-dd1497425d3a.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 0x3b32dec1b84fde0998af4ea08c93d71d5e159499714a1945f02f1b86b514f7b0. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USKC62001208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1b761f22c4b7474e28c9d97a54c85637082edf6a4a3e5909a94cf095e6606e. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USKC62326704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43b2c79c4aa41fb37cef6cb0a7faae00e5f587ffe184f91ff20f4ca055594bd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USKC61721303.
Prologus (with Steindór Andersen, Hilmar Örn Hilmarsson and María Huld Markan Sigfúsdóttir)
Odin's Raven Magic (with Steindór Andersen, Hilmar Örn Hilmarsson and María Huld Markan Sigfúsdóttir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac679199c18bb0d6f37e95b0105098e75e9a29478b954224f0fe1c7bc654132. 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/GBKEE1900131.
Alföður orkar (with Steindór Andersen, Hilmar Örn Hilmarsson and María Huld Markan Sigfúsdóttir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231facdc69edceeac2b3783f598c0dd9e9aa003784b8758b529494abfcef3626. 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/GBKEE1900132.
Dvergmál (with Steindór Andersen, Hilmar Örn Hilmarsson and María Huld Markan Sigfúsdóttir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0947b32d7e2cdf14f67ccefc8678f21b66d13c8ee1548dfb67b1bd71b01bfdec. 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/GBKEE1900133.
Stendur æva (with Steindór Andersen, Hilmar Örn Hilmarsson and María Huld Markan Sigfúsdóttir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594aeec7d663d10e382324a49f33a2d90d4a39443eaba7e729052bba07a37099. 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/GBKEE1900134.
Áss hinn hvíti (with Steindór Andersen, Hilmar Örn Hilmarsson and María Huld Markan Sigfúsdóttir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3682ff1a31f4ffcbd40c407c9d1891af5407efe8e4740438a4979e334f1ef7f3. 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/GBKEE1900135.
Hvert stefnir (with Steindór Andersen, Hilmar Örn Hilmarsson and María Huld Markan Sigfúsdóttir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fad4ece14b80b94373a81b4938b4d32163fe9b6db4f9e6eee5de9e87df77e70. 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/GBKEE1900136.
Spár eða spakmál (with Steindór Andersen, Hilmar Örn Hilmarsson and María Huld Markan Sigfúsdóttir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e200e5582be633ebe41f23f3d8994e9100b38d452fbb23e3f7fe693f5631e91. 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/GBKEE1900137.
Dagrenning (with Steindór Andersen, Hilmar Örn Hilmarsson and María Huld Markan Sigfúsdóttir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222ccdc213dde4ccee8b7e99d99d77c6c86d98f2ebbcfd6a9457337edb8ffaf8. 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/GBKEE1900138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594aeec7d663d10e382324a49f33a2d90d4a39443eaba7e729052bba07a37099. 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/GBKEE1900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0947b32d7e2cdf14f67ccefc8678f21b66d13c8ee1548dfb67b1bd71b01bfdec. 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/GBKEE1900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0947b32d7e2cdf14f67ccefc8678f21b66d13c8ee1548dfb67b1bd71b01bfdec. 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/GBKEE1900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e0ef4513e6749ef5cc74b908f2953c5639a848567cb2d0988c252f693d9dc2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USKC61923703.
Aequora (Version for Piano, Violin & Electronics)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a701e9263650dff0ff39a5690f0e730e0824e6dc6e2007362a9ee26296ce70. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USKC62528201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7913541229f56ced71639718032aaf268d984d6af2aec466f1773201a04f2480. 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/USKC62528206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6812780a6e0aa4a695c8080fd51f100f26dc3f42deeb80ebb52645639e8819. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USKC62528207.