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 0x76851bea871e01b3475cbc09cd914b76c0da0d1b5b3ce5d4c7bfbae3c4694ed4. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b80f54f-913a-43f9-8a75-76ec8c837a51.json and https://artists.proofprofile.net/proofs/artist/6b80f54f-913a-43f9-8a75-76ec8c837a51.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 0x08c1a6e442d4cc1f7a583b4ad527cc38c6645c6cc63cfb3cb91a6d87859705fd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USDHM1511351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36ad35e50a857db4f3b375f8fa68f1e492698f9d7d80b03765b2adbe2733ece. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USDHM1521501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462eb0d9412448d4889d0c02efaecf40299454873ae6c5345e2f058ed56fc347. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:23:40Z), 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/USDHM1521503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d037b9b1a3497891df7bb78c0ad809131699c4de390decb2b3b2c0f001fa14. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USDHM1521509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddb1b910c2746aa2af71a8c92741cab735230135ab02a64a76c15cfc982ea02. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USDHM1521519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386d0adadbcd6c23d4319e8fcef5896cdddc1ebadd20ee1ac9ccd58160f20cef. 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/USDHM1521523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0cfcdeb545bad8e522cdec51c7aa42706fc2ca798634c445c5fc8c1eef3fc3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:45:52Z), 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/USDHM1523654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a28ffcae302f7e3bb9633d3ec91e2f0255a36c7d17441d56ca148a919a907c6. 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/USDHM1523662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa590e70ca851e96da8098276444a3a101571b82ec6fb4c5141247e21c55a5632. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:16:46Z), 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/USDHM1523666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2cae465850f78fcfd60633b16b0978d61b2affd890d10f4576499068703c1d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USDHM1609617.