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 0x651abb9e9f08fde4be3480714593231ab2909bb84ed26d7b50ea2a38981b5207. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/975c7312-5fca-4b82-9e6e-4af7d58cbb3a.json and https://artists.proofprofile.net/proofs/artist/975c7312-5fca-4b82-9e6e-4af7d58cbb3a.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 0xd78eec75e10553532af1ad1d815f0af218e5212cbaa5bf5f2635563a0a67806e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GX3Q92341882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51981ba77baba504dc83eb980eebb1de4c48b3e33adaac1f8f8d3d20b80a14a2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ESA012006461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1909000ebe2fbd23e50459ca3923d2d7578fe836a635495e1cdf36990bfeb8c. 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/ESA012006462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17866199eae3386f953dbd8a2a731ce45a04a3d973c93730130c3f149a0042f1. 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/ESA012006463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b84ca7c744c7378d2ef0e69163d08e0424e4d4dbb87d758acbe35d88007bc9. 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/ESA012006464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa69373eaf6931ff18e62f0e764dc30436dd3b87a5d4aa4c5158c3b71cfc01b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ESA012006465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6071eefe37ab5706c6c8c0e161b277ec15b6bf712a6406dae340c7b4c2c41b38. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ESA012006466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60574bd081d1d289aff740cc2479049322caa999eafa4cd47d2b22dc2cf672e8. 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/ESA012006467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1de31e3effe0980ca1934ef7dc9d6179937a6a36774ebc89b3f9eddfcba72e5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ESA011919058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45e647939bf27fd274412c52a8c1aa39e4cc8f2c7668ee8d97fc542c99781c3. 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/ESA011919059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ba7f5e6f0f6754523e93a324df74265c417537c5d6a52ab552b003acfd3e98. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ESA011919060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf951250905fbdf0512253d396ab82546cfb774b124611398940a03547a212317. 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/ESA011919061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747daaad8af352c9d3520dee5f124c12228cc7ce77c75cb14eed5abaa59539ac. 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/ESA011919062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5170dcbeb49b7eb11a6dfbea886e305132e8c0af0a9ca6069a39c076ece1087. 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/ESA011919064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1106edf50d80e0b0635d1e655b50ff73eb7a183ba5060a72599673bd27ab0bd6. 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/ESA011919065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cdfc4e4e311b1c4358ce1f2502f962309f096fcde6c776ce850de7f5895ca8. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ESA011919066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa041d038756e5a4681b95eb982da618eb33a54abb7456322fdd100025ddfe45f. 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/ESA011919067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187805f558d99b373ecc78dd7ccf463250cfa4ae7791332b084cfa779d2ad669. 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/ESA011919068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085ad15537c7c8a47f1673b0a7ebd9abd3ed8d7b96c407ca59e223e47400c23b. 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/ESA011919069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe583f35cf1763d3cfba58040d77822284fbdeb764dde712b62c848a7e10b6d04. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/ESA011919070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ead5bb3f992a6100043c4b8d0a0d844eab2dd66e607789a046a29f932582d61. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ESA011919071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb445370733a08bc4e2fb9a4435ee4399f1af4329d8c2d215099b8e9be28de29. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ESA011919072.
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