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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992ab063dc9dbce388bf8b1797092e0da9ce61bb18983a8a701b4ff3b2f3b031. 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/83d5fd32-c01d-4eb0-b5a4-512dfd5e70d6.json and https://artists.proofprofile.net/proofs/artist/83d5fd32-c01d-4eb0-b5a4-512dfd5e70d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
They Sold Their Homestead (De sålde sina hemman)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f0eaa6d6c47b68fa9be9eadec9eb79c5b356f731f24b613e3def49b6384392. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEPUD1900202.
The Reluctant Groom (Den motsträvige brudgummen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41dcbb3c3979c99cf4d5c5d7145029a2139d81dff70abadf823d17ec05863f0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEPUD1900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1f8ccd452d31ef768de0c446b50a377198f88431420f30d1cf1dd8dfd9aa0d. 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/SEPUD1900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be3c5e404605afa57614391e484fc8f4646f889bf9c2aefaab276584ee9aa0d. 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/SEPUD1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c006b993b49524b50fdea5d97157ffb83ec3b9ac5e3889778f8ff8ba56d214. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USBN28800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d77c615b8c76f49b3c6150b9edacfa5df6ae4506f1434209b907aa5cd729a4. 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/USBN28800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523f3179f19fe1972054134995130c1ce0c78265cc9be8d93223039201904964. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DE1D32316952.
a calm playlist for reading, studying or writing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c3bf5344303721d6e771c1cbb3fff6e122c9abaa92e8ad54dc4d6cdca35446. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USTE10436501.
My Funny Valentine - Digitally remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff74b4f8253adb9b6de0042fe46e99f762f4afa74e9e6771cc303997b19a5ca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES58A1800598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b0f3bc2f5c79792f4a3d79cb6b26304e013553001b71d3d6a258c8f0883fcd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES58A1800603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1fd5f7cddddc03afd37e6fb5ec9b9863ae4cb1430819560668ebcde9d4058a. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/DE1D32343495.
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 0xe5a0105a140a4135edd5641ba9f8a425edc77dbd591a99d7fa0159d4b785e473. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DE1D32365421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70522b0cbfcd4fcc63e93c9acc5dd56f221039b3eeaad1a7014beaad15b6168. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DE1D32354316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40371aa7ffc02accb014ee8c3249bead861ae6bc698cc088badb0f8d0580d7d. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DE1D32386258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec1cfe97b0bbae2fdfa7c04deb8a6715b4e023758d74bcfb927109612da3f2c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES58A1800599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bce406ad24f71626bf690658c7263b81735bc082dfe0c0c48e6e133956801e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DE1D32395794.