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 0xb297fe12a1be6314b9d12d7fc1b6d7e04ef8ab30580ca4bd118a99c533a0805a. 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/31c309f2-46e5-4832-9476-3b269388a9ce.json and https://artists.proofprofile.net/proofs/artist/31c309f2-46e5-4832-9476-3b269388a9ce.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 0x3db7f87b4352bca4382fdef0877db8a4dff7d02d0edb549f4b59a2185c18ca2f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ATH301402060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd6d6631b11fc4851f3de5750ba2dccffe239c2c767a014b8b0ff75b880bf56. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:03:56Z), 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/ATH301402050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16109678591e7aa2144aff068c770a0ad32bee453af06e42fd4e87ac90ddfe1. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/ATH301507020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8d0866040514218422e97241f691f8be89ae5277685cff48a3cd1d8b0e84b4. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ATH301602010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb4198f2c6b84c5a4c9ac2b3b975a1a7a16456f364676ff8624ce2e85512a7b. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/ATH301702030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748bf7ca850346d2706ef9bb866aa14d885cd5f4e828b37aa2440e8243871c43. 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/ATH301702050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47725c9817c98c8b9eb1eca2127020160639fc8c309bd143df8752c03746e44. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ATH301702060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945529ca6810a0331026c075ab0f7c9a3e8562da5a336080dc73dd9581d65f5c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ATH301702110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9046f704c7c9fb5d1c6e7e1e88bbeaed3010381c6a5c7b06268cc577e2c35d30. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ATGY62100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c787dfec8af0b079c52e97bd3b3dd725ef327a381a58a11b748b0b0489ad218. 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/ATGY62100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c07304d0c5a491eff12f4b18d9cf257799867cc870ece0d37d78b6fcc974094. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ATGY62100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cf037dfa5c410c8dbeb42a389bdd25c808b384575945668d7e06452843943c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:40:58Z), 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/ATGY62200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6e0415bca62431db78a6b355e24cae2c74910a3eb0efea7871ab301b45c733. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/ATGY62300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6e0415bca62431db78a6b355e24cae2c74910a3eb0efea7871ab301b45c733. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ATGY62300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539c35be8c7f7c9c07aee902b795704eed6211e84ca12bb161c863e0576ff7f9. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/ATGY62300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539c35be8c7f7c9c07aee902b795704eed6211e84ca12bb161c863e0576ff7f9. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:33:56Z), 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/ATGY62300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0440d1f4b5439c0f320be28f68d9fe17a7a6e13a3edebc40abc8bb832922ad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATGY62400201.