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 0xc9b8c32e31c9a485f79a5c3b45e9e8f79ee2e345df32c10351d7f50e5761c3c7. 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/3c873b0c-0801-4e31-94bb-e7159b856e07.json and https://artists.proofprofile.net/proofs/artist/3c873b0c-0801-4e31-94bb-e7159b856e07.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 0x7fff9ba60c5d96f5908dde53cf7cd52ba0997cc5b77507194e74584920b7e862. 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/QZNWT2457179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ce9865b6dc866a1e8859bf20c36281fc193af26f78afe692083130d9c0cda6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWT2457183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cac0fe0845178f59e3a5da6097f227858e516d166ec20cbd2dcb0516aacb06. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZMEN2452208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c7c8f120f3e7db7beab0f18168043fb604495a9d1d5c835631e1abbb6e1e5e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWT2457188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021c174f636e43456afe7d5cd502aa4398918a428a34d6647c0c54d688bc6671. 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/QZTB32454377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3b84cd7264d53447064feb460c4845e28abd36dbe7c18a856bde178d4886e1. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:40:48Z), 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/QZTB32496953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e899bfeca845a85eeeaaa6b2bbf372956248dd280cd256d8798fc877b6d65d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB82450291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb912481e6f425ced43d0cf4969b900e68946dfc87c587d4036a1972290c66fbc. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:15:14Z), 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/QZWFH2439984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c15a09dd28641620789028b5f41b3e0114d6af2443c8a9587141d052bb2fa2. 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/QZWFG2447996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af6a6764b1b5739328cfd3e29089df382a92040c9c44ea50ce8568be92686c7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFH2439985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec8cd5da638d57ef4538f5adac79db7a7e3bb027ca55bff23f0a69cb2be0bff. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZZ7X2483093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8566db913ead73904885afb7049666c2aa7652b0eb6df56937be81bdf5714c4e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ42545401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0c4c20f26463acc310ef02db592406d731c05b7c9c409dff6c73608a71e10b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA62562526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b98e69f0f51178e05555b3cc98c3da2f364a0e588e29001788ec0fd72479fe. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBC2544586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2d815ef2efac10d6259f67a84089a594e9301d97e85cf84c3ef5d8a51862c4. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ7P2559274.