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 0x96642587c362b34cc8861e791371f35841918408f30f2394e00b7a80e6cea0dc. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e06285da-fac4-46ee-ac14-ebbf8265858e.json and https://artists.proofprofile.net/proofs/artist/e06285da-fac4-46ee-ac14-ebbf8265858e.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 0xba39ac0b084f4126f9aeaee0ff1e9861211c644c3308c9985268513b98912e92. 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/TCAHL2337802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaafae3b9448900a69954ad32a5f5f2dd48ac236123f535c81b9911137c5bc5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHM2393010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75303bb115e4c9a0d97ce5108f7b1bd98f0d3e32c34fe4102ff17bf46b026530. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHR2325984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7aea4f64f91941fab94fed45bc5c8533ee364deaf7f2899b60e3e1ecd460ea. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:43:27Z), 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/TCAIK2432028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa060b70ca57e458b2ffd4726217f78238a8404088ddf49f5d6cdc6daa6ee51ab. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:45:18Z), 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/TCAIJ2470202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0c4fe4f4b571c779790ae87a6ada1ca19bcc67ae412174776dcff52d692907. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAIN2460270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac85e3aba466dc29e1f8bf5c9a319e127d806a5c91f359c420f66de7ae41bfd. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:09:42Z), 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/TCAIP2494937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ebfdf61b3aa48c150ace8e6ee255c4bbe8dce3bfd484fff4117df69498f146. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJL2510484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf599e05cf846a9c4e9348f147ae981d94769fba8bd17f51a9901ff6b8bdcdc7b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJN2572249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8247cb9216c39d7be173fbf197170840b4fe6dab944daad0ce67e63482f7ff7c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAJZ2510914.