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 0xf473168d2698fa2697841f15c93c7c58cd35718a07748f6cbe98c7e57fda5c05. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1802ef39-8259-4e8a-9020-1d7d0dad29f8.json and https://artists.proofprofile.net/proofs/artist/1802ef39-8259-4e8a-9020-1d7d0dad29f8.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 0x4d2db5f0901dc44ec70ebf384cc59d2251ac32da40ede14552ddec8de1b047a8. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZGLS1997770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748ed6721086d22f099a2cd13ae50b28eaffc0d63002a61c06c8a85fe34ce1fe. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:38Z), 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/QZGLS1997774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2db5f0901dc44ec70ebf384cc59d2251ac32da40ede14552ddec8de1b047a8. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZGLS1997770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5691f2702f07579bb3d809affe284e97639b1ade03fb1dec6c2ac924ef80a7a2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGLS1997773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b85f38c0afdb6e86b625dbf1ee7bdf787fda913160d24f0c6c190136f194b18. 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/QZHZ52262461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4bc82537bd261e5db049f7ddf141cadd59ca1e5b0da1c8d0bf11a9be8981dc. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZGLS1997800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cd768b4d90908e463807ef6aa7b3c5017050315c6858cfe147542d6da85676. 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/ARIXB2302333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cd768b4d90908e463807ef6aa7b3c5017050315c6858cfe147542d6da85676. 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/ARIXB2302333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13643cb5b01bbdb08e1283f9ea6ca17b6052f43eecffc8c7022aebb23e090461. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARIXB2313242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417ffc7eb503908a7134463f51c9250da3d7cacf79858e1862b002b15d7ae86b. 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/ARIXB2400495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925a0a7d88096d2513ad54d54a92ffd8eef7aeecc8c4b4a84ce6ecc0f8fdecce. 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/ARIXB2500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925a0a7d88096d2513ad54d54a92ffd8eef7aeecc8c4b4a84ce6ecc0f8fdecce. 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/ARIXB2500103.