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 0x1635bd51778d1959ded3798c35eeb9a808bbd987c14ce505fb3207028ae2dc01. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd526c7f-ed5e-4046-825d-0912c041fbf6.json and https://artists.proofprofile.net/proofs/artist/fd526c7f-ed5e-4046-825d-0912c041fbf6.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 0xbd34aebadb519df005d970b203eed622a6c7bc05ad7add1ac7207914084094e5. 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/US83Z2320755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c30dd2a91f86adb4ca4211681465182de54a84b4e94d902ad6ae787300f63e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US83Z2320756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8e2278f1dd08face6e5234e269f004385c57c60fdb445a49d11872bbb77e23. 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/US83Z2320758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0ea463439b40ca5c6b9422460da25f6ba12ae5009cebdd27f3ead9d39a90e7. 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/US83Z2320760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe84e5ad30ed2628c5febc3e1e3caea48e6a8e4cd803d1541304f6ec9951c784. 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/ES71G2151037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dae54fe6ab6b51dddef6956f29e25a5015af9ae1fc6b36d3f8f1c3deb7cbe64. 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/ES71G2151035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90091b61faf476956360e37a86a735462789e212a4b3e80cf217c61954bbd4d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES71G2151036.
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 0xcbf8e2d28be187750d861f2a6b55f2f4f1dd9343b73983d3bd61a126f54c13ad. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBRKQ2019668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75917a39e577b6b47274538cddd524781f9b2f4a4e064d6b486a244dd42c293b. 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/ES14I2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607cf1c203796ddb918b532f454c13be034e137edcf16542c428a8e5e7d60e96. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES14I2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa3122f430738a7d52821c3effd2da328d25fc97ec69e6c7e26e9f0d2ab43ef. 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/QZG2X2401942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c5037901d81cd6704e9c9e33593857efb44b697920a808f4146a52dae62e36. 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/US83Z2354659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb75e76357c110986d7015fe7c48b009508b34a4679be7d55d8c7f351523ab84. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/US83Z2354657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae8bc1a1c805459a0cd86593c4db03e8ed8b8d9ac16bbd061df22087ddcf5aa. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/US83Z2354658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1851f2ac88bb0d2a63124d002d4c7e6e3ada6b3d88cb39b1246db71798949f. 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/ES14I2300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bba275411cfb59aa816c50d6c8567050cafd7de9a58db81eed2fee1b2c507b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5FN2298565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d05a4213eb389ff0e0af9cdf56c7c36f235a0cc1af997aa577a0acd8caa2fd. 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/US83Z2428706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e8e90895dcfda9a92afce7df842cf4e5f7f72670379b744049de3bc28e0b00. Chain 2 (Bitcoin): anchored in block 957013 (2026-07-07T08:31:11Z), 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/US83Z2428709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2441efe097ed5af487f75aa4c8c6904729ba50fa850f264d4756df084a3eca. 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/US83Z2428699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e1de02d9dcd9eb8cd402f04ce0e8877b860a6b524c4e4a092c2ec4829927b4. 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/US83Z2428710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862854505b2274c85416d1bc8f9b6f2dd5243a7ba6048d96b7f3f8cb4b7d15c0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US83Z2428697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254554709e65d9c5009bf1245d309c64023a3d25205fd542730d8a28ad11c832. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ42216304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9232895fc55826cf72eaa4697b36cf2418993a7b1837740ac45903121fa7be. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US83Z2149546.