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 0xb9e7856430202138a0c5e4866b9d3e35eef2156e6a7c042171057301be9349d9. 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/ca285302-4e5c-4e18-a55d-652b7c26b5d6.json and https://artists.proofprofile.net/proofs/artist/ca285302-4e5c-4e18-a55d-652b7c26b5d6.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 0xd4cc89ef59efdb0bcad550ed0f917ce142e2c8d7419627755f2a8dee0037a8da. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBKPL2028873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a3be0ad8a18cde64109dcd10cffc35e1508296bfffcc6dc9d7b3d1bb281f7f. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:00:50Z), 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/GBKPL2028875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0542916a9e48f73e0959da6039a9cd2b6f01d4fb4c4c9a1922a94aa9b01f05. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/GBKPL2028874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfc26ae2bf40c7d820a25a1e1bfdd4097a29ed4dbdf3e676d80404cdbe43716. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:57:34Z), 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/GX5J22100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf300e408cbc33b6412779b50fe92e1782e6a9093947e6484f199eae868c9f24e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX5J22100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e2edf5695f0b50185b78032438f98af3679a1015a8d832a1a82f5013209b7e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GX5J22100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3e27697ee19ae41e99f7e97eda4cd06e29944a84fedb1b80f9c69a21805146. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/GX5J22100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597f28931d47ad3e26b32341298d31d70fc4da2a2ebda2a2518dab8d59765caa. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GX5J22200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed96754ee9fa6bc4f5d3aee677da27020222c023a0629b91f8c7321a64462bf9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMDA62214497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dd35443f969356cc628fbffd4061914a99f77557e900f2e79b5fc6c543e5d5. 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/QMFME2241327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb24c17e3850566bfcae1c2550340b5ed71f17a8a45d003eb2fceee365e05ec. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QMFME2241330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4602425075ec0295346d8b3f2c31446744ef90fbd1c4296f5883b44c0d2b1c36. 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/QMFME2241332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92323d6d53172267928fcc5b5d65fac60ff97ddeba3d033bfc7eb0e4a6eaef4. 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/QMFME2313515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e5bdb7ce628d78c73493b6e575de0367459d6c8ab4ab5fb21153a8998e3dec. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QMFMF2313034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe7ab0a957c05017e6dcf217147e07162194f55dfd7dab06b4d026554d1068c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM6MZ2400432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92323d6d53172267928fcc5b5d65fac60ff97ddeba3d033bfc7eb0e4a6eaef4. 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/QMFME2313515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed277c171dd9026536aef93296a7e06abdf421eb3b69d9fbbca303a72b97f9f9. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QM4TW2476124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a9a97a307d123c134059642437177d7eb57ebe2b93352ec43d0c176f585ac6. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QM6N22448640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb09e972018aa59960c0e3fdc2aebd7d9fd4db8d4d5050485849892c597815c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QM6N22448659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3fa7858af1a9c8e471d230683c57ded66f2c2f28b87fd08c85fa3365ad16a1. 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/DGA052433037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4bfcd7407800a5c93b1561c23cb3c50b3fbaba7bd24ec0afdf4b0e72ba6a34. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DGA052433038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf300e408cbc33b6412779b50fe92e1782e6a9093947e6484f199eae868c9f24e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GX5J22100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e2edf5695f0b50185b78032438f98af3679a1015a8d832a1a82f5013209b7e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX5J22100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920781ef9550c3435f5d1d964e44d148e4c84bf9637f1a6238a50e8ba0f9ae6b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GX5J22100005.
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