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 0x2719c8d902600b01c3b19e634ab976957d35756d8d9e9e15b741495b5470d267. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43be549d-a783-4f4f-bbf7-135dbaea9e96.json and https://artists.proofprofile.net/proofs/artist/43be549d-a783-4f4f-bbf7-135dbaea9e96.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 0x5f5871aa7ef18a848e5e829d78350760194cfd981c00a5863cd3147be7d3b8f0. 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/TCAEN1990606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5393d97a08fee4a797c7f3bf3152099f8c8653153d2963bb894c369ee54ec79c. 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/TCAEN1990628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8df80eec1fffd70c6717223574dd7943cf83e73ee8ea6041a2c07b0c6d2bf9f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAEN1990578.
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 0xbed958e49dfd736fc186f629873d3189a886915ae4013cfa0815ae011e02fdb1. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCAEN1990633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e24f6fbc5eb6ed04ce878ab25316d33d776288b1c8b6787c0ca1a12d1c7a9a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCAEN1990645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530935ebebf26480b4c0dc2cffbe549a3a6fd898c0a8345d0b48ae9fd000e656. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCAEN1990678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0a76d83ec0b329863e25656d547960be28cf396e36ffc74af20d2419c82ef6. 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/TCAEN1990666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7468d68882b9f14f6f1b89d426a615381b1a1c3b47597e1edea22186a502cfd. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/TCAEN1990624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b61c94639a422cb6cf57aca3a4263c51ecdb8542a29f63b6762558be42033a8. 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/TCACY1711800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92391e1cbcddef12be7b3e649675c69c895e20ab4c6cc7fe53595f0c3c7a24d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACY1711654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0705519c123974652ae877e3b8e50f336ab0a977934bb69143dd3c836cefcc3f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TCACY1711811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00faeabb04ea49ace4f35aa1c741a5704eb7d458cfe47300ec5b8624c16ee2d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCACY1711652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3acc215260cc5d00dd87b61f00892f5dea8b5e300f1523d65dd734abcce5d3. 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/TCAGF2220449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65cb5cb9bae0585c7821e7790bb48d6f45a4be041c573ec10431a39fa4e9d66. 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/TCAEJ1975071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceff4d4a97204f07606adcf97129ccea0d3da399d39627c55c937254a3e6c05d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHNB1964517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e65a6c752c75c25c63cf43336180b309ce10d50a0b3a1dc489f80da9abe0161. 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/QZHNB1964518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94afd6f4ff51178058e8a47c765dac3968cbe274b2a23308bc2ce013f66432e3. 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/QZHNB1964521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ebe1c567b14cd85d1bce3b14f9844478207f495a738070644cd4c4bb3bb5c0. 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/QZHNB1964520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5446d1f0f27ee36b8c4a4adf62dcfd8f86fb07d0a447d3521478af269a25748. 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/QZ99L2131905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a6fcaa4186a14702413c864e34db0b4c699730a741fd0fdc4d1e9a138ad57e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZ99L2131904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe970f30cb77e7b570598cce998f534327a9b8b277052cf055fe0c0402b63190. 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/QZTB42347927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b7b662634f046082e7b90a60a002aee0e9489cb8da3efcdfd54bf289372abd. 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/QZHN82238670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51cce9bab0f3c9223a7bee1c8a862a8bbcca9dd1dfcd62983a26bf9eae98ffa. 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/QZ99L2131703.