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 0x06f4a1ea61d5998aae09c4ca11f42dc430d206166be97aa910ad899bf774a65d. 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/092877b3-107f-417c-acb6-44f3316a2535.json and https://artists.proofprofile.net/proofs/artist/092877b3-107f-417c-acb6-44f3316a2535.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 0x199c190e3924c3cdb46559c27bacae69a950d2c364c5b26391e572cba1aa4b5c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZS662148451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5525e5fbacb67400a01affc7c91fb1d8160df22c5bda639eed26ad886d606a1e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:53Z), 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/QZS652193315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0406bc0ed6ea79a1e8fd15a350199e801b7eedb8c902c5e74efe56b9cce4b9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM42K2255726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e33d2f67b189ff40d4219b9a95f21bc00c5769b99f625679ee1bc67ebb630d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZS652285853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c710308ffeb5ed1d83c6269e882dd6848cafea009970d67ae381cb3e1e1299. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMBZ92294284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d3d592d0b0a41205b16e5e1e1fc79e5f299dcdfe2aac2b14f311d8dc5114e5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QMDA72212591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2988113d39be35cbb8df09f687e4f36b979b55dec850c26b4904a575942dc02. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QMFME2250561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20d614ff0c8cf818e22379ca1090e3bd399f7e866efbfbeff0a7c4ba069af9e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM4TW2309329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0cc10c8ce07a747310c8475a35cef6a8e61df718ca20ab266289b8eab080a6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TX2388199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b5c7bf4703f43b4f087884133b98f38f10b486ec45f7188ce1bcf428543fea. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QM6N22328555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc4b9345f99eb487c54d1e6cdae1895841cfd20fca42c2211ac028dee862e64. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM6N22358055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558dc7937144c6fc9e1e2f2193095019e51a6de8c56884d1627d284f36160dcb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM7282340104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc377a3c9934bbf1dadbb5f8a2a197f1679e86c14a11df0883eb856cbe0df0a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:33:33Z), 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/QMFME2330101.