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 0x150f3bf49738e63feb397030900261a569937023e4f95c7d6a3f59fe96c1befb. 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/6af8f8be-f712-4535-884a-c29462cd79fd.json and https://artists.proofprofile.net/proofs/artist/6af8f8be-f712-4535-884a-c29462cd79fd.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 0x72aef608d7a350bc8e1277a60d403d457747f63340c854e54c7b79c846b77345. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DELJ81816052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05381258eba3e7de3ed09bf6abdfd6f0528e4f2f3653904b414906e30c1f96e5. 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/DEUM71906208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08899f76e2fae27277a831d88494f6a0088721a59d932933a69f2daf004b3c52. 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/DEUM71906823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6373eb1343c9aeefbe8bd3c4f489ba5022d633c1a4c40dcbe5c65e7dae39d9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEUM71906817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552838180ee95436957e3895c34031d359be67071d344adc0f005c060b8be7e4. 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/DEUM71902987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3917a63aaed823fa372a27ca078e577ed4a8d7aea2539e1d1d4e15ab58af92. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEUM71906818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb442a0278160590a096c7d0d28c5c6c6783fb1999b4d24c212cfe8c752c4e666. 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/DEUM71906819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d44e0184f7f22e58008ff1172e8ade782dade2a7f1d37ed89324a6ea0df7e80. 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/DEUM71901774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08899f76e2fae27277a831d88494f6a0088721a59d932933a69f2daf004b3c52. 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/DEUM71906823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb969088d4233968c75634b5e2af6ccdee38993d80f945b5b98b3671108dacb47. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUM71904718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8865029e275eee3d390efd893710e63e9097960ebce79b46e9d9e942ee4b0bc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUM71906820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb9d94dc9ffa4853a4fa68fef1d161c644221add3e05146c1342c3f5758de73. 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/DEUM71906821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9d9bac042ded9908e803971152f844379353b26025cfd68be139716c65dee1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEUM71903553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05381258eba3e7de3ed09bf6abdfd6f0528e4f2f3653904b414906e30c1f96e5. 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/DEUM71906208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ebdc942e38c1ca4351145750c95c50948ef0d15c46480bede1a07c74246bbd. 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/DEUM72004246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176f4c1bb1e0816301cd60382506fb11627211618f12215259842f625c177f4b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEUM72004343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea50efa64b9ebdf46fd32b898aafa9683487bd4af92bb59582266a0314f6bf6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEUM72005900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecf1d72f12db5ed9d122c8a198fa785459d83b2ed27283bb0e584660b07a1b0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DECE72102853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c4442b63b6e29a182002d92c1aa3ff23cf4b917e77051f2a75f96d7926848b. 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/CH7812345851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1bbdd2be9516f83c9c370a37d252923741e8c8855b0a0ff3211f7338c0f4bd. 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/CH7812350408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59ebfe929934fe80f5e580c1298829d4601b4ce490383883614f96a1cc22abc. 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/CH7812416964.