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 0xc5e2e3356437b535c2fe3b56ff34cbc24ba145bea651f60fef2d06a0290095b4. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2696e326-940f-457a-b522-f70d4939dfc2.json and https://artists.proofprofile.net/proofs/artist/2696e326-940f-457a-b522-f70d4939dfc2.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 0x76f30105e61c7afa9f075d41ee27d0fc80221fede28edbcb1af37f66d2f67d20. 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/BR67K1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46627f5bf4442f5fe0687dc5dff26904b94aa12a62295347cb4ee7b731d6f91. 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/BR67K1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe04f160d93f6ec53902c158487e262609b1b7c02e9c81e539975beca0af7d6. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/BR67K1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ea0eed5b61222e2a61389502822e69bbd8673c76f808be229f034ff484f274. 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/BR67K1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3786e6e53d2817cfc50f3dd9a0c59f39c0a40a6776c46e7f9494605b232b489. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR67K1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2e8ca4b74075230f8c6035e845ebd318918cfdbef90681a816771370047146. 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/BR67K1800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbba8dca3a663cf07c30d0d718899cbd6f065aec0cc5863974d521beca6083e. 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/BR67K1800011.
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 0x786da67dc4fe487075650f2899faac038048efdab544c71133b6707e3878972b. 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/BR67K1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afcb868b95e174fefa282f64bcfefc1d7f9ee5703d72e6aa5157a1ec38cb409. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/BR67K1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c2fa916cce74203deed0ceb7958173603be404c06e083897fb8f43a6d1ef43. 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/BR67K1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc07e0abb7d2e4ae3b4fcf3a643a944051f62c20f0b8056365f9ab8dca437457. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BR67K1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e88831e35261863e5d9d6a789b7d3e4e480bebd37e18bf464bbf0a29fd677da. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BR67K1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d2cea69af5949b8a871a754bb228ad3fd7bddd281d2ee5d4d4f682a23104cb. 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/BR67K2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30810878ada031f5ad674e68894021a7f7749d105a2a430ac495364bd48c5c2. 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/BR67K2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b70cb58a2ef2f8cc2077982e8b7028b76431ee1c43cab17ff5d4d2f41c8c09. 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/BR67K2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2770fb86f52c62e43a4f3852dc5935c5214b598f177376fd6d1a4cb129cb78d. 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/BR67K2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7ef2ed4a3bb803263c29a3f17c4b0fca7359119c4cbe57b270b6d9628ce112. 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/BR67K2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d1c5395359faa190bbb76dc5d2dc909a9df67bc85868f53c412c2d3ac8a364. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR67K2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159a5619d6c48b5e3ce01732351b0eaa0bfdc514e57038ba2237cad335f8c250. 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/BR67K2500003.