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 0x4d41c21b453c4f4240ebcf81e1a70d83a79e3537c23603141012cfc26e762a5b. 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/a9bb7b02-8407-4e7e-b814-f0e787b7ff3f.json and https://artists.proofprofile.net/proofs/artist/a9bb7b02-8407-4e7e-b814-f0e787b7ff3f.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 0x5b812836e8a772a8d6f1efd2b140c3b8c8af9c204f4f1a1c434422ef635ce17b. 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/IT1071700295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e2277042778c7552e8e93e910069b1e4cb39339208a21ee1c0e792d13c73af. 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/IT1071700296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405c853d17563497c05b2cdd43642808dc2a7956cb893402f1a1d12bb94d96b4. 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/IT1071700297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a4231d53f4efc34d7f4da487a455ce431574e81a98faee822adcef50abb331. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IT1071700298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17754efa5b0106db6d32c859aebaf5968fee4afa0f0d9365609bb5c0423fe797. 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/IT1071700299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d00aa799b50c43f6b825073fbc99130b09fc8ef73fccdec2e280a80d2146e5c. 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/IT1071700300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf800ab12171c2d6b790c31a33a32767f301d3399c19266bce0901ae529095dd8. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:00:08Z), 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/IT1071700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f407c0d7f49a50718c1cf22ef5d12ec34290e31b86129025a5443d1e22ce67. 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/IT1071700302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3c55014ad8c14f6e430fd44b5d95336bd93dc8d9e9ce55182ca59ef69f6c73. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IT1071700303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a09f7713ec0048712a1768a626936b027917b342246198364d835d3319d6fa. 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/IT1071700305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cace054c2a3359cdbd8abf2186ffb561a975e54d2df9f9c24247fd3b0e7708. 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/IT1071700306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933f60bf420624c7c753cfcb18d184207bf862af85b9d2d63536e044228b5854. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IT1071700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38130987707e7dfa1d624a301f5095a8e95b1233a7ecad459c0dc05788da6c34. 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/IT1071700309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df6620589dd402a5d39514aea1b26d218f19d6bfc1293bc803853d480b2a975. 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/IT1071700304.
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 0x2fbd3565e01b0e4731ae77eb3e26f5b9cc584cb8173608a78eb3533707225d8c. 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/IT1071700307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf048e51f0a55b2129372b4e257b94ba0dec62a4efbe3c120b2ee32e923887147. 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/ITRSE1600488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad77cfc119f2ddc48cb94b1d3881afb87e6233d0f6509fe21b9438218bae43a. 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/IT1O71700354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77f9c18eb5d66dc0c251a92701c9d5e9a6389ddb85fa77defa6e2f95a55ca2f. 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/IT1O71700356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128932a41c6f352a2a6192ad9486ebd1c9f9ec8fd5788c0a70dd5b30a5991a61. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/IT1O71700355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629b434ea8a4e314935cbe23631a718065853d7128b8421e43a395341b293a64. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/IT1O71700357.