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 0x938668417c9c435a0dbab5853f9c1dec677003c2951771d41c05c5f734cf2bf4. 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/afee3a8d-e70c-4c1d-8a49-c94262017af4.json and https://artists.proofprofile.net/proofs/artist/afee3a8d-e70c-4c1d-8a49-c94262017af4.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 0x7b1218242035ec6a4b0c09a1b52c06967d01691c7cb2e7e0bbc0a4402263a7a6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ING642305639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86aa01142d434285cf80934c0f504e2b5e0b302568b739222c5971ce2972a7fb. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:50Z), 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/ING642305641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59485717cdeee3acfddda38b499c0b97191a0af97efc33c36b563a61e51de56f. 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/ING642305642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38462b581544cb9ca81b90a31f0294ca2fbcfd1eb01ec3f4c2e4acca1028ec3. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ING642305640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8506dcf582b2e96e76c15a2d01e6b4c0ee5621bfd09b85af2c110691a0ce14e. 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/ING642305637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb6bfc9b6228665efe5239332e0e7fbdaceb29321d330ddce2a9416229a5852. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ING642305638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e8c685d65a50a19bd07f2442b3b62d1df2e3038c0fb71e213d9a3af1ab3214. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USLZJ2440904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cb1a970b128303d5e3a0860a6e9e8eaaaec82e9103ccdeda124001628d04f1. 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/USLZJ2474862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd43a306f9562d86ec0c2f4acf317571ad749f85648fc8cd59d6d475bb4bdbd. 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/USLZJ2447476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd43a306f9562d86ec0c2f4acf317571ad749f85648fc8cd59d6d475bb4bdbd. 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/USLZJ2447476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008e1a04dfb798afc0aa5bada1a75e1bf3b79bc11a900a59e7a7b9a8c4e74730. 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/USLZJ2440909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e4ea1288aa358862864d89c84cf786cca59d37ce03730045df83105f13ed12. 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/USLZJ2447462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e8c685d65a50a19bd07f2442b3b62d1df2e3038c0fb71e213d9a3af1ab3214. 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/USLZJ2440904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9c96e271f0f593c8fe9c071ddff6642a23f227556e5b1c87c7f18e1d786dda. 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/USLZJ2474879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cb1a970b128303d5e3a0860a6e9e8eaaaec82e9103ccdeda124001628d04f1. 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/USLZJ2474862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1325cdad4f3bb35794cedb3544ff45e3665da5b1e6ca2f38022d8a46fad3ae26. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/UKZGC2407088.