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 0x83d4f1f3ca5d66a78dc7c05d8a157ea08184269af0d18b6b72bad3b9881c4d98. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6a5ef60-355a-46f4-85ff-22ef47abca4a.json and https://artists.proofprofile.net/proofs/artist/e6a5ef60-355a-46f4-85ff-22ef47abca4a.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 0xd3b2d7f75dfee45a9b91ca7269ce2d60fa9e7f41139796df522cd46961b7a0b6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ4JJ1952916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8031a901a6c49f5ec095e067d7b607e1bb85e3f016e3cd51a26481d6558ab259. 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/NOO6E2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04fe87c9cf38851c051dba9a738d9220b3300d6bc0727707c6c6933d8d70363. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOO6E2202015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4d451033238feb7ad680d90721ce1f734570bde870dd979a5bcbeb5c4633d4. 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/NOO6E2202016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0debb104dfb3c5297630f274746f80b6359c2d3d239aef23d47c22ccbf40b505. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NOO6E2202012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafc4c899d34f0eb796b088baf1e64f7c6808cd934c950ddabf97402a858f1d2. 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/NOO6E2202014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f263c74e2d0d0073f8b5a4e02043c348cafc07326a8546f4cf56d4001e980. 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/NOO6E2102011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13848ef474471e519744e085443c20ea811ab03402f6e5f843cc6c61b6e263de. 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/USA2P2122714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ffe660bbdc1f9cd3eef63a690ea6bee799387a0364eb50bc6fad4964c87c2d. 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/NOO6E2001011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d062a7b37f817ae7e5d4c65d760ced1289f15aebeb0497247566d3115f02c3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES51800508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae12521dbe005b710c6e02188d7a2591a0a23f27521171bd49e04544fd5e9948. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ9JZ1788135.