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 0x9f2cf202114ef8ad3812be2d3d3c7eeb889b49daefae8b4e061a19790c6d5a58. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a22daaa-dd7c-400e-9fe0-48c0120908d1.json and https://artists.proofprofile.net/proofs/artist/0a22daaa-dd7c-400e-9fe0-48c0120908d1.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 0x67b18edf26c68b5bd3fad0bef87486eff4e6a1a8360cf6e1d5c7e17db52af6fa. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:10Z), 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/QZHN92587410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47addad3592ce48d55f32fb12e358a25fe9d3dd6ec90d114e16b7ee07516f62b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN92587411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc56858bf797bacde23aae63c257442b1ed5caa3f43424fcd78dfbb1198400b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:01Z), 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/QZHN92587413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5ced33ffd3f2a03a1d1af13b9d9bb1203963c4bf555011b2dc681f0bf46d2e. 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/QZHN92587414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb288712d807571b3673710cea57b8faa6f55eb29e8074c6cdf92230d180f5097. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN92587415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7adf7d60ca015c6b80bca9482c5fe667f91e86007904661c50aefbcf0e8bea. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFL2325379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78e7f2434e9f2a2e9c87e1e14a44078440836a0c10cbd08e212c3633f3db5d7. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:02:57Z), 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/QZTAW2481377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d3615cf74b434d360fbdee3412a2877458299a54891e4eae05211281d7b2c7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:31:57Z), 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/QZNWY2588814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9797c60898666588ea1c155ea2b63ad4bbcebe60e96ae4cb549fc176b1cc93cb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAW2481379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433b1bdc3e62db58f2d2e6294fc3a436dd2c5a9e1f99dc816c7161af9ac56d93. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:33:43Z), 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/QZTAW2481380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f851e60090bcd2cd201d2f4de6f765eb241adbb83b7e8a00fe56b0f8cd8044. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QT3EY2561332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b12ffb5d69b192ab3e7ef830c923b2f654c15b7bcb0f7924be6a5d6b1d04e81. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3EY2561333.