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 0x4d0046e472159c4849b590161b32ba7c1f5ee0f9ae4e374e2e1ea10a4f2e3563. 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/0f085901-4b4a-4750-9d0a-3f1fb96a6746.json and https://artists.proofprofile.net/proofs/artist/0f085901-4b4a-4750-9d0a-3f1fb96a6746.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 0x6881c0bfd1d95357f4085462309fb13acd5788c32ee28fc115d6a76f4e7dde7e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWV32456004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f97a76474a530677a2ab52b55f1fc81f7fbf4a0d765c9ba902186038791f1d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWV32456019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f7c50835cb0b5e2987ec4bfabcdec5b5aed1ad0c91c73aefa25024d0e9d120. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZWV32456013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5424550f9a905e5d26117a0510461b76224313a11d318dc860d87edf7629b39e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWV32455953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684e72091d376ef43529f298d8afc6002b29e1aa2371d8329f235f8a172c13ce. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWV32455961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1308a525a2cf6a36edc80f0aedcdb00e735ca07cb0064efa135d087d0f1b61fd. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:51:11Z), 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/QZWV32455967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581837221665d7f52b0dcbf93aa8abd1aa430e1ad383ff9bb72c5e17a811aa94. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWV32456022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cd9d685d790a9851aa9a57355b807cec354ea52ec56e94cbe45e03a9413ba9. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZWV32455891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57a980e044aa0dbfee507810f5510beb7671e99497d756bbb04fe0eb4809bfd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWV32455989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edbfe165b20b08b51564bcb32191f8d5ef33555e51fcb746ba6a80c89833f48. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZWV32455999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7b7164d7abefbeedd73724d004c21add62b8b65b4c4f2ae79fe7be7da633e3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWV32455998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cdb64d2c498cf22e22ed5cb62e441fc6368a9287735d615b8354507d05624f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWV32455919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298cbe5a4825cdd0f61f7ac2a2bd14d1826f917001c520325a3eeee9183d4975. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWV32456011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc206d4c16634850f1c62c2f5b8ec311c1b57b13a15acd4a62906f50b8ae42f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWV32455870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd90f514942ca058795275f4a35d5da27f96f1ba168ad7481ec6af3dc6eb059. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:23:20Z), 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/QZWV32455941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a51f8307a1a253d3f8dd0d9d773481999ab5d94dfac51470860b4464c02d523. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWV32455944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661dfc66262e449fc1fe8e10506dea6aa12a2f6a9d8b603500996423ed6fc657. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWV32455905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eec015ed1ee77a3d1fa254eac64fb34627acac14ad4854b3505cbc858a4995. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZWV32455938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351aa0a7ee8ff8bd10e901daaf7403c1135333b5b57a70887af6ecb33175cd1b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWV32455973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd09c03e205b092d85c44d94800b9c686deac14e61bd828abfa1dff36fbac5e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:50Z), 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/QZWV32455924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7834f799257a7813bd0a27edb477b39997f5ec4e951a0d265723aaa2563fffa7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZWV32455920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8611ce1c5257bec1fa87b66781bfb0238056606c61b49995eb1055fe3afe3f. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZWV32456008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c23bd280f3b9ad7c3e2d9d556b38acac80815610dd107ee04d5290ff97fc1a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWV32455945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1326303621987081adff7c823d03fc2b1cdd18f11dd66e38079b0409be3084b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWV32455993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45844412f6d25c32ef12c5a7d4740c7ee6e5b58d6ae1f4b5d19803b1a60edf02. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZWV32455946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5d8795407667d41b92138ce965dfd2945c2911b3e12f7928ad7f3a4dfcec2d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWV32455922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3159476d93d010e9c6d2e44727bdafaf0bccde8143857173354c82aa5967daab. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWV32456025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5947eba59882121b4b8018cd0b036afa58b8610bcfddb7815c03cc9af1da454. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWV32455952.