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 0xac8dc7367c79f9e31c871821e895b4b08d871808667c003544014768c02bd621. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58d81a2d-7ba2-4516-b426-ce6c68ec4eed.json and https://artists.proofprofile.net/proofs/artist/58d81a2d-7ba2-4516-b426-ce6c68ec4eed.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 0xc9b834e57397da691ebe28fdd6af97d36334c85977e5e53830fa45ea18f888d2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:37:48Z), 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/NL4CP2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a5df758a45d1b441f471552ec55ca7b884ecd858e8ca5b6f15a17a019f6c17. 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/NL4CP2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b0ddb35c0adb6c4df553e38a2e08c54987a9b0c25d1bd8ed610cd855e67d67. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NL4CP2100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f19d4a81e7143a940c2515f6d86c42b02ebe9d5821d6aa627b01e081044a094. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKXN22174741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc10e168c7417fbbbc374ca738866896f75778f3cadcef9222dfbb10d4e2e89a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX3Q92047505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d6042842ecbe12bb2df830aed3bc16c805f62ee752192f13d81d1fe708bd66. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:05:11Z), 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/GX3Q92047515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8842d526fb9da45388403a77843995d06f462cfc099f36490ca73b4314199f32. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/UKXN22175834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed56e42d612d67563d44ce466e1ad533f5e119cfaf200cee8a362a4a66ef5ca. 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/NL4CP2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36858f9db82e34252f61b80c63c476b0b04b2ea5d5bf9d554a1a58d4de1a37c. 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/NL4CP2000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3b734f4bd780073cfb5e0cf6f2665fc6cbd3c912ab095a290e695ea83a2857. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NL4CP2100183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432990d736b227247dd8bc96b6e2ae80745c1b5f6ea545efb6f90d19964d0b9f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NL4CP2100122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf8208888c265e80f7f703bb7f5c576aef23fbb42e28ab8864159b970389d68. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNWZ2127602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba7d0d42fe8976113bd0bdf2bc7de2bee7233f3208c13efa7e435c7dcbcf7e0. 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/QZHN72485382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0b7985fe37158470f857a35b273a0ef335f4fff0b632be6c5de9fb402b1975. 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/QZNWQ2449947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecd51a95de2393ebeb998ee2434bed57e894ac281c0e9712de345784b65f859. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWX2468142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74b83655dc7d6d329e0df744ecad8480616666ddbcc3e65f1df2666bda129b6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFG2425511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7668b8c250199e25118eb42d47d372f2761031baebe7910b13c0c4bb7d05006b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFH2497901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378f671a3873198e0e7d156841de9ccd43e00a48f1efbe14a8706d584164953f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFK2372783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6dd4eade3c1eaca72b2a70a70fc19f1db7e32770cd33f035e5bc8179bbaafd. 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/QZTBF2321960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74b83655dc7d6d329e0df744ecad8480616666ddbcc3e65f1df2666bda129b6. 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/QZWFG2425511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0b7985fe37158470f857a35b273a0ef335f4fff0b632be6c5de9fb402b1975. 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/QZNWQ2449947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3417255044904a4f4d820df76a0e7da0b8209d22a1bf2a9ff738905943a3f703. 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/QZFZ62472483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecd51a95de2393ebeb998ee2434bed57e894ac281c0e9712de345784b65f859. 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/QZNWX2468142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2bdd6c057fa84e84d7e98b320f6c456aac795440be8f4c71fdc8202cd1e2e3. 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/QZZ7Q2401538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22779a86c22fb8dc54ae12c8642eec3859cb4b952cbc3434a2aef0201933b9dd. 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/QT3EX2483254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5713017be8f491905f4facb2ade1c2c25aa337e05e50702fd7199ca66362aef9. 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/QT3EY2421270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e521bb30f40f3084a7a0d26d80d4d4ba79bbe55e2f516f4696dc74bd9c0de58. 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/QZHN92573793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc02156d0e9f7b2900ca292aba5dda36081e8be77532b9e659aea88a81b6e5a. 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/QZNWQ2547385.