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 0x70eaa44e59037ec489b89fd9972144d0525b76a7d1c4775067e39e436500bdd0. 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/b1412296-2c64-4319-9850-358f9857f56d.json and https://artists.proofprofile.net/proofs/artist/b1412296-2c64-4319-9850-358f9857f56d.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 0x9e10f4debe37e43c1dedd0a752847f3a5f41cdcdc21133f3552466935791b089. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82442405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f2f9a6cb44a2666832b7d3333f13dc09fa4149968bcc65416acea434beced3. 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/DEPI82442404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1ba6500ccb81559bb8d93665e3b651aef1b05fdb94daa6b67865e815c73bf7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEPI82442402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0a3ef49d573d3486949342ba53a97b43b687bfd4a22de80756507d8ed696ec. 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/DEPI82442406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a8e224028e29e33ebf292c6c562a66ce8e14aef4f513b7d634f5e0e440df06. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82445728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c38e1c570c015c305f34b2bf2fa89caf7085ea3a3cf5639db8dd97693eda62. 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/DEPI82445727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808eb38b4002b9492bb44854a813eb8f36583ec6a86fbeeec9f4420f9a4671ce. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEPI82445721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a02abd347ec261e2f9d94dbe4bf1904874f3a78e1f07750f7572ff55f5c73f7. 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/DEPI82445726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa112bd2834fd1a4db6616700907be4a5e5b938b4b7ed80992720ce4f674a9f3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEPI82445724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453847eebb333d4c859ecd75b804eb02520dd9769fc9b3ef8ab06dacab5ea765. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82445751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24436cf82e052ac92faecbb75438692f9b3097d9f1ab0801c9420da6429634c4. 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/DEPI82445730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa859143eb0ee96d8c1f1574f7461cce8b0415d03c194dec4cb682ba51e17a0a9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEPI82445736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1985dbcbf92ee431cec2c8fb3fdf5b8b4ff06b84d239286ffdb79416c40107. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEPI82445729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f76c25351df5decc53120815723d9fbdf4bcd7922cc66879b18d9e6a6cfe0d. 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/DEPI82445768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d18df3383e13ab7220ad50a02d6085ec3cfb0a4fbba6dd67b2c835f82a01165. 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/DEPI82445767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6228db5a96a173c8bcf32c529168d42c251cf68c817fb4d19477433163026b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEPI82445764.