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 0x8f9975ad6351008055306a75de78a4ec41245024100ca09edaa332e54075cd89. 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/c0e1ede2-afb8-484f-bb66-e10361f5c023.json and https://artists.proofprofile.net/proofs/artist/c0e1ede2-afb8-484f-bb66-e10361f5c023.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 0xb796fb8bcaebe27cd2435ac07ccc61f6b94d950f1c72cb6fdd39285a8a5e097e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCJPO2152903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2831fde1df6f23c29ec83115b297610ab9c6c0875e2b87de9ce4bfc0264570b7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPB671000931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46534845c1445651d6c38ef57caf1ca3e0ca14b7f508b627a97c17895b72bafd. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/JPB671000932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393ce17a8dd5a68c70ab8c1c9ceface27ab2d358f8a56204ccf6be0ce5e95105. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/JPB671000935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4207dffd3217c21eeb7d2bc136e62398a96246657fdcf05abff20e613f94ac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAAU1187085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835f5994a96b818d0a28c03391c0dba42ecbb4293a1f11bb15e586c519821f5b. 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/JPB671602679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4981250051212950303b5a5a9cc5ef57be7662c47b679c0fa172b8c2d8b3dc3f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/JPH591903101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f4958aa0ddfd0107f1acd1af274a0a3e9aaebd87a7b5941b22675d20b56907. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPH591903105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee7413a6994247eb1d71c3ce7c7c3c6b15e3014aebb060f83cdc7a51f860f1f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/JPH591970310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bab4bf38c39e116dfd6d0680a8cbb01d73ab6fa6da442bd43ba6017e717f088. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPH591903111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d04dd931195ceb95158dfaea3e37fb582655eb15de20ff7a40acb255756d56. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPH591903112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c9e798ddb9f2df99e5e6267bd4d57266383ed9077c1dbf5c868e5b2ec59e46. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPB671903667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7562f75149110fde54305e437d772f20d838e8fbdf22e4d43eec8c815e6d5f07. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPB671903668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adf2555083cf350ae44c5cd518684795933f8eb10d82ace8c860fa594749b89. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPB671903670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f17d89bc7b342b8019f5115dab59d06d8ac37cf5d8fd69a97a0e3c0ab7fee4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPB671903671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e3dd544fe6486944c5c3883962c3ffd617ad6ce7ff759099c6a0ad2ebafdd0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPB671903672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77374627609f0751c1008c12d09ab7d0223d3472b295118a620e6039a68955c0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPT2260805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9040093fb7f98d7fab3d02da5fd29556e233f307c76075dfd1543f79fc68a959. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCJPT2260807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082de3e2adef17a0e1560ee94df7404883fa86b4aed398d6091fb25dd652afd6. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCJPT2260808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76823a2b95c565b90a34547b6d25608dc1bf9fbbaf57e4ed5246d058cbb286d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FR2X42361290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ff09fecc9142f6592a3c5037ce47792861d6c4678e61aaf282680e5bdb8133. 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/FR2X42361291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76823a2b95c565b90a34547b6d25608dc1bf9fbbaf57e4ed5246d058cbb286d. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/FR2X42361290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1991a12150df48c34118b383db1d5a558fd94e6fdc0d15ae2a71fcb3b3d2a50c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR2X42361294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc628269a47aabe9085b1e1aa9a6f1bf2ae32f689141b5a35ece03d9ec6a14f2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/TCJPV2389486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2f6f508c9383607d9d95142bdf321b20306fd794577096238c8b1719abe338. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPZ2434352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe827263362432a1edfa3e50eeb547918dd6e399653caf0558fe94479f2e469. 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/TCJPZ2434355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5ffe67f1c43105bc3fd775f5b387249fa29e1441476a4f40857510121e34e2. 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/TCJPZ2434356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5487638d91dead44a95dec14f1a1c8380d2d008b00855972f405752c161107b3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPZ2434357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20970d4b3ba7b8844624155a4d11c03e1627f1fb630fd80be8a2ebbdc7bc2c5c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPZ2434358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c9df3b04cf46fb383a9b562b60112f0f520fc3643c481c0c035ffc2f14e33f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCJPZ2434359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ff5206dfae9fe3c1166b956273cab6d3bb78df071c4922320fe1455518676c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCJPD2434450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfb83dc1e4f9afae38ff26c56ba01d50453178e69441cbba30183f7c88f6a3c. 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/TCJPD2434451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ff5206dfae9fe3c1166b956273cab6d3bb78df071c4922320fe1455518676c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCJPD2434450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfb83dc1e4f9afae38ff26c56ba01d50453178e69441cbba30183f7c88f6a3c. 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/TCJPD2434451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa191ccb6108173009d188921a75ec646f7f2c56e56eba87c8e29989299cdaf2b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPD2434452.