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 0xef1e539c7d0350e89fee8b9f5b9aa0647aff7982b54d00caee9196ca6408dd0c. 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/a94c9eb5-c232-419f-8905-b8511dda5f10.json and https://artists.proofprofile.net/proofs/artist/a94c9eb5-c232-419f-8905-b8511dda5f10.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 0x11302d77ccd3509ebf457a0abaadb6da2656264bfea381cc7dfe8008200a3601. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLD111700085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c80e2133510e7284ddf47b6fde9f84b47f30845ad5f3496a98611e65bc993c1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLD111700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91267889677c34ef0823425d4507f9291d15eb4d61a1657c26c08146fff39fba. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLD111700089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e1a20bf28bdb90d780a464c45284807ba1dd6ff2baf2c476ae90d10e5482b8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLD111700094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbdaec95e8cd59f4cddc1dec4b1e61a217c6dbbf2f8b78298ee409ed575ad8b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLD111700096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a75c9ea69c397fdca77b3fa7d39e65974f3336a34d5896649237604dbb7080. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLD111700097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdf70928662945d9e57e638fccd821fe0fe5e9111e22380b7de5f3b3feef685. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLI367533160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0872c6369ab96491788437e2fd06e2eb55a02a5a8b74fbaf6f3459a60d8e129b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLE951500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe3e53204a1470b4f1c9c1ee74530ddbf1859afa5e77160727d35ecb61d45a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLF241300970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc1ec59dd280d606c491845eb4bc804c026d1f96de27e32513f9bd091547dcf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLF241300983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91263f46ed1d3d8a31e5e13c605358c11f8e632b5e92de3bf4ce1294b527b55a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLD111700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2978d5ebe18527e8fff3466ecf605e90dfe168a7f953c3124e348647e1e808c9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLD111700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc764083aa1a6891c0951fe04f1996fd1e5bfbf3f6b9e080ee65e5132a63933aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLA460501304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91263f46ed1d3d8a31e5e13c605358c11f8e632b5e92de3bf4ce1294b527b55a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLD111700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787aaba63a1c507e762925596d86abd3b496152137083418f664ba56206beb31. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:09:49Z), 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/PLD111100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916f7b4cd6366637d7716285b7a5b5070964b6592ad0fbe9559cbff0860aa500. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/PLI367533190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fee0e839681869460a8752c6cdf731a13946cdedb910bded04060fd6fcf24d9. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/PLD111700099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c18a477caa14f121913c4cd77765788982388dfe89c63afa7c40b2128feec7. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PLI362179020.