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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261450aa4c4b15e2f488ff5ddc63e26925f4af744252d0d2c513999178ed1933. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e81d285-efdb-4290-aecc-e498bdde64cd.json and https://artists.proofprofile.net/proofs/artist/7e81d285-efdb-4290-aecc-e498bdde64cd.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e0cfa7dc11a3474ac52bb26ec6c6bb1179e5b7032f16e400608858eb69f67. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/ES94B1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee0187d6e793f7862ade471acfed6c9feec48b6969f1600ef87592366055c38. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES94B2000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e2e03e1e02fc89b5aa1da3ba321fd1e8f8eeb0972be563b00f61cf3810d76d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM6P42073506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf452a00ab1eae09710d1eb940c38f303d0443c3fab34b6fba8767af7a9f0e64. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6N22037901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf451d09a62bf0425d92e4f92762b820b2105961687363d519e9514e837642e. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QM4TW2105151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e526b8b368395cd5f5e71e93d5c5f0bed48a0f0db70a97078d4a89e48330b49. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6MZ2163563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e0c86a0518ec7eefaf619fda842ea2da104e87dd0329fa38efade31f4ae5ed. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMBZ92181697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f323462b138cc427671abf64aa44919951193beabcd8ff82e24ba2c467adad6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW2280527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3b34db321f8800445cfe813ca73a660900c2680e6c18796624b729448e6661. 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/FR96X2315890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c78978235f99bbea0af81607948d6c31d86acc26a5360cf575a073002fb308. 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/FRX202210198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2bb18338ec4f0c4b47711a9ec2b986a6709b8b695f81963c7d1805aab4ce59. 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/DGA062221472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae620e53d4a22b84074559971fa83ba54dae4dd3f92793759cac1f95dfb02e83. 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/FR96X2315901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18a994e1060353e7181c3a7ed5eb62450e20230bc1b55bcd693e3adc5e00052. 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/FR96X2315906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2312db2639b2993a713321a74695a19f1cd36172566976deaefcffeede5f87. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZTPX2321193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25337acbb2e63180c6e3916207634058447983be3062ad974d212b5c19dd5e61. 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/US7VG2480996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0ba3bac6749238710e4351fccead7c9de059f2fc002655ac7751c046364e2f. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZGLM2470219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2f31e6361390050514273fd52ca5afac7173891b49ee4e2f37fd961def30d8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNJW2435443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da0be4ef93de366fb2ae40a5f85b6a83cb6c85e2e540015951d13989c30ec3f. 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/QZNJW2461041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3653f9d9afc4bcd52ddb4b5effc2955fe070f3f9c87fd6cb520adbadea6298e1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZW9K2409563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39682d1049a07592c28af42f09fe21f6343e10dbfa376149b730fee5a073e636. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNJV2553124.