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 0x70b842531f44a7868389ceec2ac8f83a9b2f0d954327ec13efd503e979c5031a. 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/af6fe4b7-1d33-4e42-baf9-b6165657ba63.json and https://artists.proofprofile.net/proofs/artist/af6fe4b7-1d33-4e42-baf9-b6165657ba63.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 0x16538dd482fb474d83b5ab72eaf15fdfbc4a9f2cf7a1560bac4cddce1cac3f2f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEE592022023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b76e05e823433fce766796ab2691609b4cbb4b32d23a1e5be3f8913d2f027a. 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/DEE592022005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3214bb7c4270ccaa462cc313d5ae125ac74b1da4008fc134404585c4c9d6da6. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZMEP2396302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ab8feb8edd63549431a2be4efa222a8edc9614080bf2426b2d1793900d814c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZMEQ2468348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6b5e053d2c75a5a3342c6b7bb022758b086fb2ed11822e09d14b047a6f1849. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:29:14Z), 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/QZPLS2436538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8177cf595333ca3e10f852658310140ffdeae8c25dfe2d9d9b37e6c72aad16. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWFM2466589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9454ae7266ad88936b3a1634e62d69cf209b6288cc240cf77a2fc996e5734cc3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFX2545779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b7b57106c0b8483519163f48d2dc1a24bb60aac78d4bc4afa7db2a4c69c282. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3F72527804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384cf6d9411672e6f89ef5f22be58cb932d170608c79d607029548b64e09bbac. 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/QZDA62432796.