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 0x5d877528519ff439d0cd85dc73d8ab1874026c609e13f1a923529e244e9bc77e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bc66e85-171b-497e-9d1c-f30a2fd03ebf.json and https://artists.proofprofile.net/proofs/artist/9bc66e85-171b-497e-9d1c-f30a2fd03ebf.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 0x0dfb83a36d58be26c28af3c9e438ca0028bc92aed43b1022e4400666f9f63ac1. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/DEW250201116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58567fc937a22f098b3be33e3674ac0ddf97667a72f88dcc39c963f70a42500d. 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/DEW250201326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21442b337984a13cc19042949468afb49d8b995ee4a7f3afcecfb2b62782bdc4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEW250201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82eb2c0d3c470c324df2a29eb311381cf5f061e1214217d39e3e63942966fe61. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/DEW250201002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180111d3ec9c46334b4c60090699e787354f0c4c1f5c8eab40ab632883068eb4. 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/DEW250201004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8768453f5261dd14890d21bcf29de9aadbf28c2ef436a2b94f3abbd93803d01e. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:00:06Z), 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/DEW250201005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8ea941ebd4a8782b71e57a4f83076cf0c3d8566ae7935497c19c618f78ebf2. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:57Z), 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/DEW250201006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acf9cbc70b036dfd7edaeabc4054782da44c64a4889dda468cfa826520df2cf. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:07:59Z), 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/DEW250201038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f523e73d2f643af1b0eaeee2a620d05a196b354b0b9d2bba154801586b0bd9. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/DEW250201041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289d30719b64d5730d28aa35b49f462bc90f65739b92ff5efdf3d66caa92bd28. 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/DEW250201042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e2cce7f2978643dd208dd6f41908606957875f6f57dd7b00372252245cfecd. 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/DEW250201043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0b2cb43049866a43f916619eece7bc7978a4f8ca04cf52c022213d22e8b5f2. 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/DEW250201045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059e46b5ce2909f37a6890f008727063a7e282814339a14d02c7574ed4e988c8. 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/DEW250201104.