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 0xb3524fd39e555d88f8ed0a972f69226b6ce04e4ac7a9dc2a162bb09ab4bda069. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5be8d280-069e-4d99-8496-fbb8f448d2c7.json and https://artists.proofprofile.net/proofs/artist/5be8d280-069e-4d99-8496-fbb8f448d2c7.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 0xa611f599623ca5e2db003354cc2d1bb5349d58d595aa600db18b705b438bc0c9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZDA42270471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc87ad7e952e05e3424411ab47c7104b043400cd4e71ccb6e83a311d8f89d136. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:51Z), 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/QZES72289227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8711f53b2370df7c3f571d05f18d392dcc673bcc364840f454e380d22d1d631e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZHN92276602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d94845d03856cfda35af0928cec9ffc3a817c6dc92c94a0314f1c1927bfe67. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN92276599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca46dbf9219a9164bb74de78cb5498e83ec20f564766462a1f1bf75fc47bcd2f. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZK6M2262554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e994a4b2129c61542114eed01cda954273b3255e8cea7e3efb154ccef2a81fb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTAZ2247422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1053f2d4d5e4a46d80a63acd98e78c938296e4a4a4dda8bfc9ed9176d0d60f. 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/QZTB42244823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c7a63698f5fe230535a17a1f884eb1eb277b9232ff64d04b5de59be910e058. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:28:55Z), 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/QZWFH2319854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e072938baf4e91351dd4b30a9a5081d100fc982f0645154f1b1b5a8062edf8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:37:08Z), 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/QZHN32459492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa066bdec0ea0a37f27bb73aa6f1a6cb04fca290c41dcfd925c78903e08741385. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN92415773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29e0b03bdc1afdbd613fc6b90c4ba347c27c4ae6c4c0137e55026b1568f9d98. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZK6F2479109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd23c6ffeb101a3d469487bf36c878cfa79614d29e397a435b66569e769094d1. 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/QZMEM2490155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206d66e981c3ac953455373dd0fc4b465521701d323a854f87bd1ca180a22dd4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTAY2472580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc089663ae7210bdccede6b1262f6db15afbfe58646c502b4b19774d8ffa488. 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/QZWFF2444286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299b404af938a082f23c7603103376e8720310cf953de93d13c9d21d58c3d627. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFF2444287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b2f48c7b005bef94c1976154412cc48b868e360e0b3e079fc39cba2d84973c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7U2406086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d509e197bc09579dc7859fb5890f710b240a170d535eb6e73186e02ef00dcb. 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/QT3EZ2438593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93596c0754c899439aaeb93fb5aa54f16a821261811a79a1ea5b40aa76a4392. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:00:37Z), 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/QZES82559625.