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 0x3d341ac47946e18858a265379bebf32a7c144b8726bcd9ac796dc022ca2f3738. 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/253b2a45-3d56-45a4-b89f-1ec76b5ed410.json and https://artists.proofprofile.net/proofs/artist/253b2a45-3d56-45a4-b89f-1ec76b5ed410.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 0xd0e2cc97c9d3a65bc5da668aa07f43353253b6b156e9bf9a70f42a74ef6ab93a. 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/USHM21865535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee57d8676ee8803bd37b50ee0b62e08475c033f3fc119c8e09ccb7e91f6f7b3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM91858595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d513905e28633bfbdbc42df5f660db7e524f73584969b15c6b31889d7a8280. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:29:39Z), 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/USHM91858597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8932fbef4495eff32aaee124705b666bb7384387ff915d4f9a77c932a727fbe. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USHM91858598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38f48b16617a626640f87c5b9ded9efb0fb0b12824e79400d931a910a472169. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:05:48Z), 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/USCGJ1943147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b67bd60775f7d3ab5dba0f55bfc826ef40d31b0d094b2fe5df8e97f9160620. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGJ1942964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3b4114a433d05f51eba97bdc68f83d77b3cc2116907a4b1e3bb7d1efd514c1. 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/QM24S1923474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252adc8976ee7d20ed3b1d88c312866988ec19ce7d73b08c66150db7ab921f5f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QM24S1926356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb198459c500c35d36f897be585824f6e2c7731f1d4b4f0f3942f9c8e9c6ed708. 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/QM24S2102421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe601570b195d344cab80b3597c57958137bcf10c044c631899601fa0bd85adfc. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM24S2103170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fe5229118b7de1f46b0b31270717bd76866dc9e1a6aec7092cf64a982ba1af. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:04:09Z), 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/QM24S2105839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe3be38246cabd08bba89454bd5a6f6ec23418313c9f67047b5b19b220fc6c8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM24S2201393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1428a909c30837c6b8c4eec7aac0c3be81666edb73e181fd19d73034735b03. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QM24S2201390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a3f82276c720cc1bd963f1983e3690c9a3650b4084264b4941a61d2e033603. 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/QM24S2201389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32399dc4bb723d430bbf50dde34e9f8687a799613f888d2020fe894b65114fa. 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/QM24S2201387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c03b669ba6bf6716a1607f1dfa14c080c70f873411b583d5732eb663a881322. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QM24S2201386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef91ad1c2437be7a2314000b7201b8b94ecee79aaa4c9464bc51c1e9e5fca689. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM24S2201385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06744a8071cb3625dcd1265212d64f54bb3d7d0ca305b1dff559d889ad4e3d8e. 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/QM24S2201384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77141203990d658fb7d7c783b466f7236960379c48f0c00ed5e752cd334fb963. 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/QM24S2406788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf44f7f99d7a1b8fa3142e16dd6f579dfa7d49be39dbb35cc264eb09993c782. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:05:34Z), 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/QM24S2406787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad79f453ec2aa609bf43ce413d9e23e5890af47fba4532b7ff66a894aaa7d54. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM24S2406786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1963cb4a3c5ca90289fe6055ef194b129a28417f2e7a70ee4da03a7e897b717. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QM24S2406785.