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 0x4979d980d910a2d5c5356e0ba685b21d7d6fffa6081003038a581b5a1c11a81e. 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/25e59583-95ee-496a-8dbf-55f33710dfe3.json and https://artists.proofprofile.net/proofs/artist/25e59583-95ee-496a-8dbf-55f33710dfe3.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 0x133862911f4f42dec3732d9a47924b561c78b7da1c931b0fe4e4d9833be56b51. 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/ES7311900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf786bf34bf168c4e3f172418f0468f789e68aef1c9b185f32d7285b3b329bc8e. 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/ES55G2000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa715f310c5b1e734716e73e605f14e497defdd8f7e18c1e95d2854da552644. 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/ES55G2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf471501bdf65307c7cd9d05e02ae67e28a48be4fbe80a1649f4198a28f483025. 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/ES55G2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68e2893ad57636ace948b2bdaf581f36b3c3edb06388e3c91bc5a43a6c8dada. 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/ES55G2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1e92dd84f643cf02d177c7eba4f720f62d1bf0752905fe00c0119c49d3ad02. 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/ES55G2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f441810bcc6352694b7af6dfd2006c85427fc0636605ea4297f6901e387974. 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/ES55G2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096f770aa2a87bd0ee6d360db8771cbbe2c2c38bcbcb21512fc3583abae877fd. 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/ES55G2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371add2fe83a04b92949b4477735fdbbc93bb245fbbc98e257514dd278f11b83. 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/ES55G2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72c3924e593cc6fc177cd8a7654b210fd43bf879191a7ed7256232b2f4893ed. 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/ES55G2000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82b7d65c471ab759734d8079a6e5a96fc99311d510e25d475e1e7ab315e50aa. 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/ES55G2000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928c4da9a6ce64a7319d1196cbb21286cb41f6584cb0657952196e50b368a314. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES55G2000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d65ac210a340affeaaa2af29df51d6e69fc7a4681c1925460c8fcb74986ccf. 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/ES55G1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633ded73b43084ecc87cc9dd711c4516a75ee85de5cd5da12b254c7dcb83eef8. 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/ES55G1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2372832b14c62ebeace3eaed57fe912a5fec01999a4cb0bcebf312d8031f9900. 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/ES55G1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a5cb1fd734836b5a5c95d76cfa07de5a0d7c326861d98b363aa67fc0881f29. 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/ES55G1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47d64f2afd86fa8c6f457299920065a6d3cb869fd33922e4aa871536b506e25. 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/ES55G1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aa8942b2b367fb056bd9ead8382e3aa8fcae07082c7b06589005b1d9324e5a. 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/ES55G1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc7fca076fb25006e824b05560cc3f05d9232a342c7ff315893b2fa753f3022. 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/ES55G1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c27981bae34fc54dbd7589558ea904ee96e7a09341a143ebb1553d4a348db4. 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/ES55G1700006.