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 0x977126e3501a3863e5c7eb3805d2797caebb8b6af388c183ef45eb986e847c7f. 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/8cc1ca7a-8cfb-48e3-b9ae-a5a435cb7c80.json and https://artists.proofprofile.net/proofs/artist/8cc1ca7a-8cfb-48e3-b9ae-a5a435cb7c80.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 0xdea85e9316c6a6d9623d84a6b617384b228cb004679a4a3c5530976123078ed5. 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/TCACI1518089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b5c691c3c26eb1dd4490cc378c29cf08fbf0dfeafd993beba0f2c00fe44def. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZN882147632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b5c691c3c26eb1dd4490cc378c29cf08fbf0dfeafd993beba0f2c00fe44def. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZN882147632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a231aded927374404e3d09df3dbedc625c4c6e53072f4fe2e15caf8430433a7. 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/TCACN1647369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ace6d876498b13fa8f973a0d9a150bc9c5b9bcc6fef78d640591f6fe3e8dba1. 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/TCADI1794358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5cf9f45a1ba22bfc442cc306e3ebec99d663107a961a7f5e1fff631be82dd4. 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/TCAEG1991980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bea01247e9c789f09e8e32854d7c4fd20607571435729a9956d42a6becf76b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:17:14Z), 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/TCAEN1946378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dd86308b5d1f4760ed628b1598fd070925db8911e0e611db47677702c7a61d. 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/TCAFX2129379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a02bb99c34bf75c1b0fd1737760899741dcd2e9ba986ec0a7658d08be028cbc. 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/TCAFX2129492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd754c00c7a95cb32284d22c5465500e470fda4747112f586c5ebc0fb2f38822. 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/TCAFX2129504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38626fc1b996fdeef28c337463f9df4a2cb3f1e92c2502c256e2bede668d2d3. 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/TCAFX2129508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d5b2b1fd19f44a7d7780173da4bab04b0d1bf0f9780d078e424c5b7a3fedd9. 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/TCAFX2129511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb509c20f614a6c93cdc9ba058170c276946e6f88b84661177eb7a07a5554d72f. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/TCAGI2258122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c68ae2cb1d1e69eac52865556d9756c0ded075857aafb809fa5f2612c8ca15. 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/SKE532000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909b7f541826a2758bd4c71f1a0310ecda476227176678858d159d884554c36c. 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/QZN882074774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf2f963c6e585e21260a009ff7f927291a1a1133b741688a92f9c9074856228. 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/TCADZ1834576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f2b145c767ce3f6417f58cd13f6c0adea5be21b08826a22737b746c96ed87b. 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/QZWDW2215195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb8d69c136bfbec730cbe80a9d1316d84eda229aa958a2ce44f633c9277161f. 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/QZN882202516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d3c6be28b120920695cd0b0f23f61c52b5cfc356238bcab3227ea2f3024abb. 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/CZA232500121.