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 0xeac3ab2ac18d938471df713334f0e960b25348c5e3b02ad58f149c2fb6a6487e. 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/06bfe717-ad66-4bfd-889c-d74a8e1c8b00.json and https://artists.proofprofile.net/proofs/artist/06bfe717-ad66-4bfd-889c-d74a8e1c8b00.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 0x126fb6afb9334ea8fc00324082f4e65c86e8cbf46f19860530954054d5f5757a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTB52370664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6ea2a7dd5ebd66685fa781b3e70c2153721350e1eda08043d83d309a781184. Chain 2 (Bitcoin): anchored in block 957640 (2026-07-12T02:27:45Z), 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/QZWFQ2365501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55569ed12c1e6d7dab0792d7a8dcb0e22af5d6623d60ddb0695182bb0a29c8a9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFYY2447674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00819afeae30ce5973aec0c2f44d7b684f68f3437e0ab36feb0c61a35c922fc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN72498633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff12315ffa8f458836cf3d3f6e172cc2654cf36f927da144fb0059ba70f42d44. 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/QZK6N2446184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf61f56e145219d9c1893ef81329082d076c86620f1b3db09c91a82d42fe5005. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:32:03Z), 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/QZWFU2438403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b7e5fb33e00d0f31502b6f9b276401192fc4240d761aa8ed0002d3485ffc2f. 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/QM4TW2576178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985cb6bf19133d59a2e6e4fb620c3658ec9f037dc0dabef43baf206564a52553. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZWFT2515008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf61f56e145219d9c1893ef81329082d076c86620f1b3db09c91a82d42fe5005. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:51:51Z), 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/QZWFU2438403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60265c84abbdce3c0ecc24b1866176fabcf3010e1735f6511064e318649be759. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:30:19Z), 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/QZWFW2524048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59997583f936ed97a2c3eeb3171fc466837e640596d57f8941e20c644e913240. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:50Z), 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/QZWFW2524049.