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 0x86f7af2f3cd644164baae9be931fbc51a26ab5c777b49adb36098c53c5a725ba. 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/f20ce91d-84cc-4a60-984c-0b8fedc6fb7d.json and https://artists.proofprofile.net/proofs/artist/f20ce91d-84cc-4a60-984c-0b8fedc6fb7d.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 0xd9da65e4c95e8f6b0ee982ba65038d5afac4c9ae3886ac0e9dc51c581ad45c4f. 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/USSM11507907.
Jul Med Håkan Hagegård. Svensk Advents-och Julmusik.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccbb2871bbfe61e672afe8736bd48291a50a7f94848c693f7cc617d5a3cd480. 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/FR10S1600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7fa438d5abb54a7f37a98925cab35478151def6643818a9d269393e9ba7096. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR10S1600071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba74234ff5192c3b7c86b056cd50232b104e83ebf61fe66fc8f608a21d27cea. 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/SEBGE1500901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59410ebfaeeefc74c74a9a1919fe2b5b646b8b7fd26808a88bdf334d1c0ef28. 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/SEBGE1500902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817b92deefa8151171d425154887f9a25a34276cd6522453102d8179442129dc. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/SEBGE1500903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c94d442d0a1d9d2f306b563588db9f28dcd01e132fe0987aecf3051f66c89c4. 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/SEBGE1500904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0a0bb12489da89d72e8ed08284c3fc4eb5a25df497e259eb40ccdd5571b68d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:45:25Z), 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/SEBGE1500905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223efa32072feef366df735a7f8c1bcda1ad5753a7403cc74e9c86d0f8a2b234. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:58:29Z), 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/SEBGE1500908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c9496533ec539cc59efcb0c4b4074f5b3f762b83ab1d644872c8fa5ff2acb1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR10S1600047.
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 0xc101aebc15eb6571f914b3728a182b4680d4afbf6b7ead27a2c2a07364f4bf00. 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/FR10S1600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d79fc1651bf04d71561e62402df832c1a0dd6b40ba666e4203b2493b1def45. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/SEBGE1500906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6019f165e1a917be8d65d7ff087e3cc99bb30d57d05a94b30041a9ae158bc080. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/SEBGE1500907.