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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c839d87c95852bc0352890b8adad89e63fe10ff4a3b8d2f2b4be48b00b0abf. 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/4e236d41-0faf-475d-852a-c7153ce5672e.json and https://artists.proofprofile.net/proofs/artist/4e236d41-0faf-475d-852a-c7153ce5672e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c93c2dcb83b19f0979c4bb0f861d5bd4edb4b13d30346192af8d4d424d16c0b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GBLFP2408470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d90c42841766201161426119547e67b9ed1630bdf5e2fabb8f137aa0fa256f. 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/GBLFP2408496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad303b6a8c840eada186c918bf71a1ad1157b3f90dc8e5b9013c003a21dd8cf2. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/GBLFP2408577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba725a3f3385a6d51596bd8083d24a514c7a3a43ebe42bc40781368f75ad147. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBLFP2408409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4c1a54114f3e73f7ad4620933aab4eb61539c800ca9966115f1e9265aeb0f2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBLFP2408578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3422b3fb28d655aa498710dc1eb6f08e563a1043fcff6f223f928dbbf3be621. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GBLFP2491283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d0d064849ea6257fafc902aa3144786fdad52f31d2f5b1f1a386eab38169c5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBLFP2491284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5f789ac0f2d125026c7d0a7fd555bd311fcc537caacd5ad95811fcf401bd41. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBLFP2491285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae9f35f122a2b4986e9ef35d644e3754c9c59d249a866142729eb8f56ca4f8e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBLFP2491286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3726aff5b264e9c7853d9ca88937676522f4c4908ea27e2998bfa00c9f7e8111. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBLFP2491287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f976428c3585ba335ae7d4f8900b00fa3efbabc5db5f7f1dfac0265dd22374. 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/GBLFP2491288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9866d3cc324cb7d52bd2db5e5a75fdbc2c29e74c4e0e908c6f73af552083e690. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZPEW2510194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92522d6f324eddd036c3a4c3100a3a5e68dd16fe80cb925e129753d62c88ef1a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPEW2510195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad3d9bca7926ff3405573dcbd0a0e40aa5d6eead175f53e5c7891bda2e3fb8a. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZPEW2510196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd91d3e7c7c212a242e3b321493ab2a0f2f29987b1a22dbd0eabb2acddc66a40. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPEW2510197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e128040ffbf9cd2c8d20ecb6e6f7823a19cbab6baaf2ca53751108cfcae6268. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPEW2510198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750334ff70612e672f37390b8f14ad7471baeeff9284bc433b2d481856a76a5e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZPEW2510199.