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 0xe776be41d10091631a650cbc1b5f278fe5c9e77c7dc1a7f419ba65ea176e7926. 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/305c78a2-7d6b-42c9-8cfe-13fc06f708ed.json and https://artists.proofprofile.net/proofs/artist/305c78a2-7d6b-42c9-8cfe-13fc06f708ed.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 0x9f4ef237391d853e8a7a53da121d3a7b6bdd8cdede81582d484ad70c83cacf19. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4Q2029146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43ae71017ecd5d1fdcedebcb3e04cce985ba574388298b41f53704765649d5b. 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/QZHN41989495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226f22d7c40ffb9dc7322080fef084e945b11e283555b9227e4daff5bba7d257. 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/QZHN41989496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6093d0f79a64b9712d21a3fca5a060073c488477b6dffa114678583f5d7bd1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ4JJ1937787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363ede1f163499e1f1ed975010e28ae1ad31ac480a979caba3451dbe26fe0c24. 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/QZ4JJ1937788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25bee6b9072d7dda95835a0b47cbdffe93e619884418dfcdddc00236545c724. 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/QZ4JJ1937789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c7cf7f40e2c21c1333c793e71193e4d1e9059c4158ae6fbba9ad12b6d48aa2. 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/QZ4JJ1937790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff3840fab6bc16e4c732438c8c70aa8dcd70bd26f72e61924a245c13e8c5d31. 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/QZ4JJ1937791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89006fcd6c6a9e134ed5d7ed62224f54617512931e493f58e683c65d6a32a6a. 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/QZ4JJ1937792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92d06510a7cfef84a7fe064e0367d59f46a98ffc06dcb91e095c9d24a58acb9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEYOK1719175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03bfc8eae3a466eba26c07dce195f1c45d4c67d4f1ec46e8b1a2e08f672eb48. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEYOK1638276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e590bd01a5c3bf9b05bd58d6637e3e03b9f83827ce8637aa7f7e37447de7f94. 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/SEYOK1638277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049d62b56029d2f02dc2b49bdfcc711736112e73599f8b83e3f74b2539ba566a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEYOK1638278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d974b3b2d04145fc0038bf07e5bfe8f2dee33955fc38020b1fe957c2a18470. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES92511323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750461b8386325fa14cb5676e0def2a941d038bf9e694d2d378fa1c848d6edf0. 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/QZES92511324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bb98808ea24c5face84738453644c7b3f81dc06b19cf5a079ab4912ed680c2. 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/QZES92511325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf152627be3bd0316579696385f441964471461f63e59a00d25b2656c19db250. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES92511326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5f754f460dd222c6ae7d34fc94f2953c1715de63d3956462674e1cd4ef4a0f. 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/QZES92511327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7ed6aeb83082c3f0da54c0a02bd1fc7255ce735e7affb7ea0527421e8f5d23. 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/QZES92511328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f5ea95bb0723b65a5ff399ad279203e49a2ab992f9a4ce17d06bdcb22ecbdc. 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/QZES92511329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff5a63de8925566fa7931d1e611c2c9006b43183de6b33c72968356a7dd8635. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES92511330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4390c5cd1111144b23f08c340dbceb72032be23d7c9c04466ee93827cf6eb1e. 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/QZES92511331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605294a365b52be9327c58920f15eb08c66f8c3b38f2cd7f2f946affe07bb21e. 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/QZES92511332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3f9a7ec5bb0f5a4a744cced43d4a08634f2f210793b75857bf31fa6491107f. 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/QZES92511333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd17ff9ea258b3ad149dba0dfadbbb119b570a799912d024d94dde8f7cc2c73f. 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/QZES92511334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55aa6bafc2c33af3dee2fc6f4cdc123c8291d1a390b1a8f7c6711fd083083b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES92511335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b17020c6b42015a3f0079f65dbfa949d29a481df9b8e023d7d2b5f063d065b. 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/QZES92511336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb468080f151f145262b461648ca10c5e2ad92a2787825995caf9b9af880de39d. 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/QZES92511337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481872f827588d0445f1cfbd584825fa63a160c8699f3574cd82e935fb612107. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES92511338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f293614609e98b8032724db2483b3de4cc5324111a1e2b4b6b0278f029301ca. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES92511339.