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 0x24de23d76da4207037db2ac39fb7ea19fa77656ee05f55ff637769375f0e9fc2. 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/85db4079-18cd-4d0e-8073-aabbb5afc74a.json and https://artists.proofprofile.net/proofs/artist/85db4079-18cd-4d0e-8073-aabbb5afc74a.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 0x6664acde26d79a092c754316d1155261fcc5d0794794cbf3d3669c86f860d858. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR1834868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f1048de788950ace0a7e76256c253cf59e8fb73c94de6139e70ef25e2303ee. 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/CA5KR1835886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748408d7fb69448dc4421274bfd1597b0f364206fbb514774d2f1113ea05a63f. 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/CA5KR1835887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc086814319ee2192e4ece5ccadfa8fb4b44d8da7933159eed5e342b7da49cf1. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:22:36Z), 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/CA5KR1835890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8539584b18b1d450a5c39fe6bece93b269ade6b6eed459f9c141090e24343cb6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR1835894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2add27db1cdd8919705eaf198bfc3019ded62d1d0cb3a1b0096a9a1aa41054. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR1835895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2951ce4dbfd2dca84781fd314fceddb0d347ffaa3f5cd270a58e2a4b9382ae. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CA5KR1835897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ac6b37c57a7a5a4f77ec5e06835037d00d59e786f0c52e011bae43bd896b57. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:24:17Z), 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/CA5KR1835898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ceefa0eea4ca3c358c5a9450bd883ce496666ab58cedfd933f9fc6f1cb29c68. 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/CA5KR1835900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0a857a6191d5bddf3002b491bf623fbc5f55f8a2d39b10e23041d85e89e181. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/CA5KR1835904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0f0857dad3de21ed29e746c0098a80bf95a6a61f54dfe78b80e1fb086a457f. 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/CA5KR1835905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8744ac52cf5515f2fd3920eaa35495eab2e10ad36b0d3ffd924f33b7c08bc1ff. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:57:52Z), 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/US3DF1840683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f2be15f74425c859d216f440c2d8f30ef092a4e20531709b057306eaec4454. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA5KR2225945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348924ab21c30889447b571297151c7decccd5d6a59c14e7f9c17d3781212130. 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/CA5KR2021102.
Los Grandes Cantan Con Fidencio Villanueva
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108523e419849c3bc8ffc1e993626f1b295c9b3ae379c2fd228a6208a4ad4e26. 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/CA5KR0015571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4397484122f0cc3e37a87b473cc7d3b51d6bbd265a70ca9cbb6a8ae8cf936364. 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/USANG2030762.
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