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 0xeebc3ad7a96186a7f6a718555e5fdd0d431476f9867a13da2c5fa4bd5a1d9664. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ccb23e7-22d7-44ab-be80-73142fa3918d.json and https://artists.proofprofile.net/proofs/artist/7ccb23e7-22d7-44ab-be80-73142fa3918d.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 0x64bd4a610d7beb0adea7f8708eb6d4052fa8e63daf4585219b07a962e1a9e8d2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG662300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8defdac7fc17d27079a4d33a481d6aeb375bbde192b47707344570013bd545d9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG662300471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bd4a610d7beb0adea7f8708eb6d4052fa8e63daf4585219b07a962e1a9e8d2. 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/NLG662300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16343741685c786420d05b8ed144a5edfff7a77946da221244cf4e921aa6c6fc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG662300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8defdac7fc17d27079a4d33a481d6aeb375bbde192b47707344570013bd545d9. 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/NLG662300471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bd4a610d7beb0adea7f8708eb6d4052fa8e63daf4585219b07a962e1a9e8d2. 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/NLG662300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bd4a610d7beb0adea7f8708eb6d4052fa8e63daf4585219b07a962e1a9e8d2. 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/NLG662300437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8defdac7fc17d27079a4d33a481d6aeb375bbde192b47707344570013bd545d9. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/NLG662300471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16343741685c786420d05b8ed144a5edfff7a77946da221244cf4e921aa6c6fc. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NLG662300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f7f7da766a3420f0b490e16281db90c5767a4a3f189861b91a6384cc930661. 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/NLG662300506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e56e2f5f85bd943d4aa6bb85214eaf7122e9f818c2ae053ca977e3b274aeb9. 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/NLG662300527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8d06183d0033b806cd41f2d1891025a854a04d0675dd77d3c1176cf45fb78b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLG662300528.