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 0x82d8c294df5840094663c5b8a1e02c837e7079e829249ea0f2f7144aaec9e9e7. 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/fec7fa69-18eb-457b-8580-eee7f574a071.json and https://artists.proofprofile.net/proofs/artist/fec7fa69-18eb-457b-8580-eee7f574a071.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 0x9cd68485572582b9e9a486117d855e9c9318dcbf7905fc0b933b439b6a94c019. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:36:22Z), 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/FR9W11915648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec44172d4ca41b68fefbbeabf7cfa44c34912f71358a6fa49e93b47790d8403. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:00:42Z), 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/FR9W11915649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080a6d339ae08cc13c7904063267cff19033de34c168fa1fa4507c3f49032c1d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:31:06Z), 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/TCAGB2271804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab16ef12e5660bc01c735504f97589deef978efa41a3123da3ae485db2392a01. 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/TCAGT2389688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c94c70f7d812f30587962843bd8cc39adeae33b416a66d5764e576c147a39. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGT2389780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f248a1b85ba191981e3bfc67ca5010acecf148ade7a79d422d5efc4efc537b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAGT2389791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550578fcd88db75d245b9556b7d5a01629c8d6cbe567c0598535537d5e61ce12. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/TCAGT2389821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453484331e7e00724ed8c026322ad87b0e1b4b8d744a2fce58ebd4e91eaca0e2. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCAGT2389810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19bf7ea51dc0af08e9be8bffd75f23089ee58c4245dbc028dc9a25e17b1ad3d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGT2389924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fbe469a79b2cf11cfbce946d958ec969bea6a30bd420625bc8507f06d61b7a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAGT2389935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f35707b45fcfa2c63afc3b6dc9ac9a5404faf00365f674c68f7fa9bc5475c4. 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/TCAGT2389941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bc0907063d766360016a926a923570ae72a44a1a835966d9807f7e988ef86c. 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/TCAIN2417147.