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 0x48546b351fea9a142852844e59764ecf3044b9138dd27ff464bc1fc187262081. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/982f428b-61ee-4deb-851c-14bd9894afa5.json and https://artists.proofprofile.net/proofs/artist/982f428b-61ee-4deb-851c-14bd9894afa5.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 0xdde3ade79db133465faa76a453548cc38ea462ac1994d86acce3154ff34a850e. 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/TCADC1746960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053aa28e1475b65b077085be3fcf324fac868dae788e7a40cba905f636f94e15. 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/TCADC1747038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2e03402397516c2c21fb05aa573b3a4d358613e7044ddca9a10ef59edf546e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCADC1747039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b5e768ba6efbcf98f990b54fdba7bc4898fa98879943b749cdc9bcab15b477. 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/TCADC1747043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6b834db24bb26ce6c72b86cf824f3e1b9c89ee1da348dadf1c17d0fd6aaf9c. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/TCADC1747040.
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 0xed2f29f008e54b4d208c6915ec7df621de72eb6ffbcfdfee4a4686f5ef241f0d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:01:09Z), 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/TCAEC1906587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a4bd3d0e3607aabc4c8ec5e200950cad4d933c983831c0dd4375fbf75dbf78. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:34:53Z), 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/TCAEN1904517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1501e04460e4eef5c2d30fc48ed1dedd7c82ed2cc46b74ca8ba9ac2b95b97a00. 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/TCAEZ2073702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550e8dd072659103142271016fb48473ad8f829754beba26fc4c9497e5c3ff81. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:13Z), 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/TCAFS2198310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7d3d50928176bfe95f83f986e731ce4777d862dd42dba4f71ca0970a96b060. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAFR2128564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd657b9afcb70ee97875b14b84860c850429406f9ece5efcae7d59ad4878bb885. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAHT2458076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3556021872c84de9aa9cd9b7ca90829bacf657b3aa50b4e984a6fae1b94ab4ae. 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/TCAIA2430091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835413256dc711c22b2d66e069769f786decd4d865efc2c047fba5040227b0f4. 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/TCAJK2587090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835413256dc711c22b2d66e069769f786decd4d865efc2c047fba5040227b0f4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAJK2587090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18155cfab22e549ed886ce0cf96ad12edad0ac4b0206fa441939d6cf121c6e8e. 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/TCAJG2527289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3556021872c84de9aa9cd9b7ca90829bacf657b3aa50b4e984a6fae1b94ab4ae. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAIA2430091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd657b9afcb70ee97875b14b84860c850429406f9ece5efcae7d59ad4878bb885. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:46:06Z), 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/TCAHT2458076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aef2fe41764a49638820e4d79ca3c2b05fa3831e899f57adbbc7efeb650296. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAJV2573490.