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 0x8fd128085c4e66019aa1a78c34628b1f069698944df445a5b96ab4758731dea4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16c12e8a-8d36-4f4f-ba15-2ef39d05be16.json and https://artists.proofprofile.net/proofs/artist/16c12e8a-8d36-4f4f-ba15-2ef39d05be16.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 0x46bd6d503614aacee3465bebf61dbcca6f3596549eaf709697e1093753340d3b. 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/FR59R2241112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2845265f461d4beae45c2d1ec5017b157c9068e10514f0cb859b9aa9679318. 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/FR96X2232412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ed64780150e79fe5aa3e2ce6f244340ebe5b6a30fa15845992070b9e5623ce. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR96X2268436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4810d560ac9090351a8edca47439ef14a90979d410fc67d97bf2429efcd75962. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/FR96X2268439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ef96ad476d9b1adf19427320ab5f8c9a5459a071f260c68d80dbaf62ac39d7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHN62020055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954027222bfeca0644aa9ce7cb451cd61f6b07d9e4b7bc99165552124344b0ba. 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/FRX282240531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4531220f5635669ad59174567b705321efd787b1adc056052e144b975481e3b9. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:48Z), 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/FR10S2309311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e8a935cb18f690911805fa2c5eb511c5a4157ec7f982bad39986dfb6dac8dd. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:24:14Z), 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/FR59R2311113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb9d8525546d95d692fd2b8efa9c6778a1229a0ab709861b8ef456dbcf909a5. 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/DGA052373766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ce8410bc593436511308ad31b4e44d048a50ca1f92d91003d63ad9cf9f6fb6. 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/FRX762422910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4600157a8deca7a169e41b65724dbe0643fb1a932f252b90b65170742dfc03. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:42Z), 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/DGA072420897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15148217ca7b8160021fc82ecf62be677ccfa7bd4ba1a8599e3a4d433dc8aa9e. 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/DGA0R2419116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb26b23564bc5582a3e577cdf8275c51cc0f91fd3f03744f971fd433ec52a2a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FR10S2554037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92799f61f84b95f6b0f581aa2bc1f2988dfde4a93b30ce1b777343c31cf8e8f5. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/FRX872579039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b01c3c7c2bd4e4123565c70e7e8e2d05448cdc4b340651ec453a7b4816fd929. 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/FR59R2449899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a65fbb3a4461284b304a5c95d8c82866bb198ebe4cb95871e75d823021e5f0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR96X2430016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b01c3c7c2bd4e4123565c70e7e8e2d05448cdc4b340651ec453a7b4816fd929. 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/FR59R2449899.