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 0xcdbcf9ea77af4e95d6b13e8772e672f8e22dd91174b9518db6a8af5a9a2e0c82. 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/0bc079b0-ce93-4ec2-a16c-f8bb1e217fc1.json and https://artists.proofprofile.net/proofs/artist/0bc079b0-ce93-4ec2-a16c-f8bb1e217fc1.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 0x2eafbaf4358e4ebdbc0520a4fb4697c4eb87bc23631d613725d7b99195f6856f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USDY41550451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cf1d936b65b28c6a3dc7f733d2b980a910cd530fdb82d6ebb5553c261b25a8. 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/USCGH1637285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a85c1fc741a6127866855c639ce8aab8963f562ea330ba977da4d8d235b0093. 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/USCGH1637291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc569bb84f9aeb46b41efd89802f8e08e43a57e913bc1c22397bb56b0007488f. 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/USCGH1497565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0075650a3cd05a11944be85a1c639167d43bfb7b2d50670c699e738ab7d995. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:19Z), 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/USCGH1497567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86b15e03716ab30ddc8d665fa18b7197d46e458a82ed880dcbf0146ab62f3ca. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:37Z), 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/USCGH1497568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a0694b191163a988d576b68df60b569d75cac89b464ae5c6464bf611653185. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDY41652772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331a78dd5bec482f4447b37debfba4569d99cf3ad8d5774941436196caebd2a4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:14:04Z), 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/USDY41652775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e04cd15e0056c69df5772399df7cf0307c96b074336bf2d32eeb5a558920fb. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USHM81707089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb900087935d866aa1bca8f6f1c24398d046646629b6d22849fc3f670014326ad. 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/USHM81707092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace54f69d02d9e72031b595cd532199072c210c48eb5dbe738dc24f27f59104b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USHM81707093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6aebfd9a794f00fa547ec1b023600aa2544bd8c7eeb1a942562d13274e747fa. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USL4R2062662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9b3fbff35254d3ba041f73097899a1b1cbecde1cce88a33b7757a3ed9c0e1d. 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/USA2P1557241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722b2c7289bdf9f6dd9d093bca8265f371cb00cde0855ff62e27e9cd5c908a46. 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/QZW9L2258348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9af32120c76cc99502d1a1795e327fe9e1176900e7fae3590f8a00ade3ad67. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USQY51158042.
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 0x94d9bc5f64c3cd6f739adec0aa4e7cffefb7dc5421bf4ac520322f07fe7487f8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDY41782939.