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 0x187f7db8c57571aeaabd678d53334725a84870ca5414faed6414f6411ae049b3. 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/43172c51-6696-488f-8279-6046e743fa0f.json and https://artists.proofprofile.net/proofs/artist/43172c51-6696-488f-8279-6046e743fa0f.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 0xe35a7dee2d9e3393598d0733debb14e3d49dbf94bd92a891cdbf08918f047416. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFG2483330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc71a11aaf4f7e231446c7d002b1b30f06d5ae8602a2d467ed576784bbd0a94c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFR2404510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d60c18059bc1f95ad9bc4dcc92b2933b7e73add20653a41dd5afb848a32ddf. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZWFU2486970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5905cc3bac901ba00ac7625f24ecb08904186bcbc7e419f8782e70e5fa8f14e7. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:52:18Z), 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/QZZ782417445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cfa867a7b16ede6bfba441c173090db16788700636c14e7cf5962ff2feb2be. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3EZ2450746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9853a05c8e47792042ead1011ea87783deaa7fab075f21c7ccad42df35e3e2bf. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZDA72520909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadda7c0d55b49d7db3517a1c28c7acca23210101b7e2dc9dd7fe9077b84d6ee. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAS2596248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eac29b9da4d167d16d5e4b6addd738dab51809dc003e3915644374e69e9bda. 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/QZTAS2596253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379623e65d09a94d6f05c6f05a99967fa416c08e78909048f3be1b4b2f1d271e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:04Z), 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/QZWFL2591866.