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 0x604e8a7ecfbcfc61af103ef2a87a23b895f214fccc88a6f1388307126f9f8c32. 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/24946df7-9fa1-45e6-81bf-ad72d7de1892.json and https://artists.proofprofile.net/proofs/artist/24946df7-9fa1-45e6-81bf-ad72d7de1892.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 0x01acfd4f82d292d9e21c8bc5cb461a0045823f8dcccacc9f5359cacdb75f9cae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM42K1926881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d003ee11f0bec5a62ae9058a5c2c348a0eec1aff4f7a6a098dc1de0ff9c6fe4. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/QM42K1953133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a2a532bc2540b2bfe4eb928ef2c0504a5ea66d47f81027f9d3909446338ad5. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QM42K1913506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc400193e7996ca75b95e3d41b92dab8808bab4222fc9689172ab252128ba7f. 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/QM42K1938567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991af74a7fd3fcfd95da4f8c7c9b13b9854f57937ca0f269dd4338872fd5b1f1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM42K1910127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c0f470e271e9166e2c75de444e5d23b5b9f21a62cfc8815a7216557a7f31d6. 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/QM42K1919887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034fb52be1974535611fefb3b74193af11047fd1414ee50cb75133a529120465. 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/QM42K1908567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528ec7f2eaefde80a05bc4ce0eaff1f1794fecb1473375d28fd451e6ee8e750f. 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/QM42K1916678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f3d2d9510367d1b5cb95395acd09beafcb48800e49999bcf5de81fa490fe98. 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/QM42K1959089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6089b4f4ff650c4cb13f2265d43d0806d7d48a60514af54d150ccc4581b6400c. 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/QM42K1935001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860d419b603c0b9d8e4ca637c0ac23d12f371b77f7ac0f5962b56680947c2b1b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM42K1982791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141011f488765a15211b473591353b88419732d8faf35c953b45f669f3970c9f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM42K1977341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f5bb8da5d70b6087ff88043d018a96b32297d290e5e069e5eda067005444f1. 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/TCADU1885531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc76230be8acb12fd5915849c9fb3055ce40b31e972c9b97ed30242a8d57ecfb. 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/TCADU1885533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ca52972eafa15a94d21b597badad6692c14ebdad005a0d391e52cda818e0dc. 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/TCADU1885536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8631c89362c74470cefd7f08966d06085e928cee34fdd279277421b5339cea2e. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/TCADU1885545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb6ca7bc4c12d134d99a7ba2bf65cc3c9612717b7b2ae045a0f223ee6501c41. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TCADU1885548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb557b29748dcb36956e104f28ced5183ae813d674f902667bead0a4274f59dd8. 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/TCADU1885566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ca023de90786b9af81be3374e588faac72efd4800abf77eb0b41ecbbc5869b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCADU1886253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1945604e80bcead4c0cc8ff05ea1e5ddca41161cfaed9194ac989a0471964f. 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/GBKQU1916709.