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 0x7a2e5a48520c77a3ac6e0805fe699cb6bab466143177a1d06eded8a5f88efa84. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cb3e5cb-b069-423e-99d3-c6df147507fa.json and https://artists.proofprofile.net/proofs/artist/0cb3e5cb-b069-423e-99d3-c6df147507fa.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 0xc0ea03e8f0aba79dab48367e9499f59c4516e9132511b86ecd2d9cdcf076d586. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/TCAFJ2124945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe304638cf3e0dc9c4dd61fa3b424a060f4764b88c71619cc368d9fb919a82078. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFJ2124977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cd42f47419b8650a57187f006fd1cac51e6337699626a52c3fcc9333bb3eaa. 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/TCAFJ2119950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bed6218dc5845bc2eac6d3f8febd8c90fa5e6d28ee13515037203e3d507b363. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:07:22Z), 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/TCAFJ2119977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84251f665fe610faffa2f1d6372364d9ceb23eaac9db4f1ee88215a4e261984. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:33:45Z), 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/TCAFJ2119986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332533921d46130210d04482deb6d16f12f280b9e675c3a2cd608b76238f3b3e. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/TCAFJ2119997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0225bb275f4d9afb3d7c058d913b07316e715f9459e56daee26a4b8d98ae31c9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAFJ2120003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606ff5812e95160a9d2905c0fe1d8672fd97bebde7f8f606dd4681eb6842ba20. 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/TCAII2404843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7021876f7106a04034308d5461ec9b6b1a636167962b4d8cbd63cdaa5a9f9f7b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAII2404848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa394bce60e3761c57647e6fe80b60f23caca79870b09b59b015db00d24bbd0d5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAII2404870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c191305f5ea07c07370ebd987e84304553a02245ae92bfb12a9ec7dfcad5af7. 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/TCAII2404873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d73852ec01ab59836f1554a7d6dba67ec1266232e30ca4edfbcf225c249b143. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAII2404902.