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 0x64741cd413e6886b8912022dbfec3b871ef01cef615c512c73729610b59f3614. 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/1abc5422-e918-43cf-a3b3-69cff5f7385d.json and https://artists.proofprofile.net/proofs/artist/1abc5422-e918-43cf-a3b3-69cff5f7385d.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 0x769cc6cc6d8033c089e526f36eefb64ca068c61975196b93bdc2fd171cc923e0. 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/NOFGG9628010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6105160e33a0adc40c1fbb7e843be77c2435c0ac9358bd18c386d9390d62fb. 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/NOHMA9705010.
Min Første Lydbok, Kjente Eventyr Og Fabler for De Minste (Kjente Eventyr Og Fabler for de Minste)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054a7cc18e9d0cc679dab694617e95b81737aa4fe812da39e1d3035489a15054. 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/NOHMA0610020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cdf3bdd247adf98aabf495e5285226232ce2f411e976e2448b78c0b0ddfa37. 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/NOHMA0610030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf38d038dbcc23e6da844e03d6e8028391360845f24679fff0821149242c5f0. 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/NOHMA0610040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0602f92c8a83d40feabaa2775478e9e4d18bb7265b9f4e7f8453879baa025743. 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/NOHMA0610050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8bc39a52af0027bed01e7b4c31f14f41ee6bf05f46ce35d9213cd1994bef6b. 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/NOHMA0610060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa249728eecaa42c655ce45efa8d55dff33878c709f7bf2865fe162fec6bb51f3. 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/NOHMA0610070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a769dff24bb5ae0a88f760fc79276f6ce25e80d8fc73270b9ca2e6f5c5ce931. 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/NOHMA0610080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91291429447da3cbe1db4d973068127875ed575abd2464025810024576d8dcd4. 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/NOHMA0610090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f391cd782cb3508b048e76c58ae92a6877c33eaaaf73266d4c0d110e9608b6c. 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/NOHMA0610100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1baa1bb81a442a5d9bd2e003b607cfd65c78dbdb8eb1bb92e3ae8aeeee8e75. 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/NOX9X3162110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6479a7287e17221f63552a294f4b6856c7daef60eb83c09082297ae7774f94. 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/NOHMA0465020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fb9ee944b565e22ea59f9999d0ccea5a6d44078333ae85708e5a371414caf2. 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/NOHMA0465060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf694dea7cb11f388e6cd195d68d431798b22ae864f47b55cd61600333c0c1b06. 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/NOHMA0465090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10343e8108c40c1a0ce08b5904e56103ebf8b8137db2fbb285fb31f682d40cc8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NOHMA0465130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530798520dc08f996ce2db97e6a4348f556507eda38a5fc029f5995c2a03603c. 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/NOHMA0465160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd877abbc95a1227b27232d752d273186bfe815660d9d4e29d23c448c936b39d. 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/NOHMA0466070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7e916f0386835e0dda8d3fa031b3acb4af20f2c746e6d639cecfdf59c18feb. 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/NOHMA0466120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6213759cecabc0bc776adbe0ef1e73365ce43bc70d4618f04e3639ce86a7a16a. 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/NOHMA0467030.