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 0x057f4ea35eba4aeda9790bacab7857e85d5526429595f76d5346ea0e2a5135eb. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ff6aaa9-7b9f-45df-aa68-bfcb8fc1c9d8.json and https://artists.proofprofile.net/proofs/artist/6ff6aaa9-7b9f-45df-aa68-bfcb8fc1c9d8.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 0xba28a91c3e3410054f775f5c56faac706f84f4ec408526619f3b7f95a24f3d87. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB22255211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8072027de0c568b0b97565e75a28823dd77d5633f6c16f3c9d3395c21ef693. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTB22255212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2576e954a28c27af735b2089614b353c9434b1a64361722bb960572eb77184e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB22255213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe887b0dd52e1d2a26aad9bf095e8d71f0dc9ba8dce0087a8071214d6ec2e6a22. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTAT2296783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbbca509b32a6eaae8eedb2ac749e4848b5aa7ea918118aa69d9c54b3a91516. 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/QZTB22255217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f141599c8558dd128460de6455613466c166879eefc314dff6b895c17a8504. 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/QZTB22255218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1750ac7adaa582b195cecad17fcb72736b8bb08b94cc327bed92fb4538b8cdf. 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/QZTB22255220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496571afbe0710222d1629616dc646a8551573986d2c0b76820d7c43f78a6fd9. 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/QZTB22255223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba360d64208dd318b313bd88e8566054dcc173fa45a9936a8ee75d5068ec4988. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB22255224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a1e8faf6ff67c88e73aa79e2c2f9d1f272c689b2505b33f6032a0f599f8160. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB22255225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe887b0dd52e1d2a26aad9bf095e8d71f0dc9ba8dce0087a8071214d6ec2e6a22. 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/QZTAT2296783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c925ab705c5ec51532baa680ca434de6cfa23bb6e3f7a5eba8a0226ffaa2e2. 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/QZZ7N2495012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac6b1b46bd9c40c95510bec19abf8a152aeb457b2731905b9a1ab56fd501333. 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/QZNWZ2399211.