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 0x5e1d14b6d6cae0c9103e5fe202289ac6e10499d472056f15770873dc921751d7. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4791cc39-be5b-466b-aef6-e6df328753e1.json and https://artists.proofprofile.net/proofs/artist/4791cc39-be5b-466b-aef6-e6df328753e1.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b21eb7e1d10f36ba4d5905aed45599bc2a350b2247b2619ba3df87201ea1073. 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/QM7281739450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eadacdf75783e00650d4783a2a1f5ddbf7d3074df44e88d1e1d9cd64e9f74d3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM7281739451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e95a988236dddb7e04e1dc9eaea038650f0544340850380835946fc14ec628b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM7281739457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1005a0177a2ac3977cc205c37db7283f8e4b07806eda93fd6f194611d67c405. 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/QM7281739453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56710e602f732d7aeb5619ed0b05e89b257d862d310de5d68ac1fe9ad1a7fa20. 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/QM7281739455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a1ec5d5fba2af22c78da29fdc1e4d02fcb30504888713271708e447e01eda9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM7281739456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f6a5acf355beb9ea200629c637c7db6aca438ff342bd52e45a9ae35098b7b5. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:32:27Z), 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/QM7281739454.
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 0x7b38cb06c2797305607d2595df6ed2bd1d84841454a9d00dda204bca1098043d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QM7281739403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb902c4da756ff541ac45500a307754a7c2055e58a6649d7056a0342ca2fba1f8. 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/QM7281708461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e3ad52c7afb9e49c1012523514c423d48160f7215d7691e66e0c5e2a43d245. 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/QM7281708462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf49492dbb7d0322b95562964b4f69223bce0b57e1169261dc42fc0e3235853b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM7281708463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327d78b87fe98a5fa6d45dd9646241750248131217f5fc31d18e748eccf3bba7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM7281708464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc101c56903a69104220fecd51a5b4c279ccac453f64b1bd6cb0d37ccf75119. 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/QM7281708467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc9e310049254479d15eed574ea6255cb9252cb2117f0e70e28924465b3014f. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QM7281708458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0900bc78cda1571308c70ec8e6633eafaed4e24212a72752152f67b674b8752. 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/QM7281708459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214fe5295fe5b7402af7860e97e4058a1fa40ceea8dc4f54400513dbe727380d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM7281708460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6278c3218548d5395f8963542ace5bb56208828c1ae0c26e48430a57fa108f7e. 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/QM7281708465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f72639bb3bef38c10c69e75228135adf3c2d5faf6069e0336760c99ba45e27a. 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/QM7281708466.
Como Arte (Canto a la Javi) - Músicos de España
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f91a8c7b5554e0a95914f945c60d1db0ecd1d412eeb355a4b5d57df76733ad3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G2029095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c53b556b9fe0024d81c685af3e80d84509e49a8b6680a03892ee43dba84905. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CLKT21902149.