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 0x5bf13ca3437ceb6706d91ea8723e4334829772d141749d330021ff3f8184c2f1. 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/016daf27-aa82-4346-beaf-9ca5b63f0d8e.json and https://artists.proofprofile.net/proofs/artist/016daf27-aa82-4346-beaf-9ca5b63f0d8e.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 0x9ce82861bae568e37e6573161e8ccb09729e1af93fcc38f066e20660314e9eec. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BC0SX2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04559346b8cf36ddc5e348f0d1fca6300d491f8944eb3e2062dbd43cb8150821. 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/BC0SX2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f00a2188071ced49ab2e295becf675254cd3a0238bc08287906363bb64d1e4f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BC0SX2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc286852b9ba9cbb48078e811fffc9ac524423048c6d0ed9a9ffc9501020b28. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BC0SX2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb396bfc7594bbc806e5c4fcd6789a01284fb97468f18e15ece476c2630399f. 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/BC0SX2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ad391ee7249b72634d484efcd80634b4494375887c8a9500f1c87061c53f77. 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/BC0SX2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe863d3d388650f08de05a25940934fa16165a7a8e8eba487c1fce6a05f054517. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BC0SX2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1812c36feefb174d5c3c2a4800105feca23470283313ff6a8996c283cd49b409. 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/BC0SX2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8952b7810488955f782be4a6db6036d50e494443c0ffb20fe2dff4b4c428b88f. 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/BC0SX2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e193f9c1ca0fefaf0f3a66373a7e16df4349a3c3bb7fd0f3920cb67113f355d. 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/BC0SX2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd660b4aee5f6e3fd309eecf697555dd69bceda7a353ae843a7abd94264ac2b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BC0SX2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1417066d3cd5362f404b069e947f222c22dfa421aa52393bee372e69ed44db. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BC8TH2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2140f4016b8a93cc07abfd73eb4807e9dcdf01f69b233aded4c10f4556b190e8. 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/BC8TH2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ae5e2f5ef6b139d7e361d4692b29a728b5a3ca171bde4ff758a2fced9b73cb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BC8TH2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9d4e9e946aafa0d191ee70a64435adca1b2b233d753d8480f100f309c22a93. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMZ92420282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611e61db3b56839b9943db80df7d1b3afa457a59b21e504dda56017f826aebd1. 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/QZTVM2357439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1417066d3cd5362f404b069e947f222c22dfa421aa52393bee372e69ed44db. 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/BC8TH2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ab2dc0128875d395bc8ac2eda3b54c16c0d460628c8fffa41cdc9bc4ca39d8. 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/BKKBO2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9ab16d58f6425a930987c9b481357006c466183cf84d344cfc29825daa35f0. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BC8TH2300011.
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