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 0x4be1aa95d2815485d787d00940ed7e1ece1ecb545f4a4108bb84c1595c339341. 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/e69fa8e2-2f7d-4f48-97ce-aae94db92ea5.json and https://artists.proofprofile.net/proofs/artist/e69fa8e2-2f7d-4f48-97ce-aae94db92ea5.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 0xa877f2263b44bb0b0ddbf8cf11b3192673ffb0048ba4330603a867fbdc346c95. 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/QZWFM2402955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87e4c11d5b623665453c10ed105e40804d72a65faec64e4a7947e5ab55def7b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:07Z), 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/QZWFM2468370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc930b3a74d0f1c659ba44bad9dd669032638076da0160c49ed365aa49994d2b4. 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/QZWFM2466487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fa9d478b52ea5c4b3c061ab1b03e7a1c90212dc50ff61f2c7057b29b4eca72. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFS2453260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e840f151c705bc95cfeed3ee9d864c6f7244b660c58e7d7fe9de36f64634bb. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:15Z), 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/QZWFX2487095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5ad663c1b91fcb5600a61f73b841fa6c9f60cd62f23525c69fdc2e31e7d816. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZZ782443098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4c3878692a64e03813e5300bc29de315b818c861bae5d409ada039b7e96dce. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ782444433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0190907801b28dff2eb7e0a217885514830a885dc3fcd5b5c750653e586096bc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ762427362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b48ad147a66345aac96b686c68e04f802590f37322e902407d789a0a5a2d624. 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/QZWFV2460368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7e95583f3e5f36a2715fb6c541ea74edd31170b7439e0ea5faaf3bea5f703b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:02:30Z), 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/QZZ7U2490392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143e5f1ffc0cbbaf2df7c5da8694f368c28351854ad6581d0fea5657e1deb542. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7U2490391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cab4d20ccb8ce26c67e6edf12289937ac01c9530f24b8e37e705f7f9580d99. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:43:37Z), 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/QZZ7U2490396.