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 0x3bd2af7a933109c8e29d774ab4d92dfb6e5242953d12853612a4b7c060aae19b. 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/b03ae608-feb9-4f7f-bfad-8af84ea6a252.json and https://artists.proofprofile.net/proofs/artist/b03ae608-feb9-4f7f-bfad-8af84ea6a252.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 0x047d3b8f3351d81b48d2b8bf0af575cbc05faac5e1a16bbb2ea12a932668ef84. 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/PLA552400455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309d5b1f9695a465ade96d012ecf696976881bbdfc5efc3e452b9f9208cc1563. 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/PLC062378005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8d26fc9cd2edde6501d0476fe284785450a96dd05b60646b092e6e04a39225. 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/PLC062230831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c4902c6336d606f1309f49933deef51845f8f38b616b58e287ce8ea31f5c77. 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/PLC062373930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005922cabc0870be0661844de8a36e2da2104fd6b50869caef9fb9d5cee9e374. 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/PLC062370821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76aa9be66abc8a5700eadb98b752398ac11bbffd66d0e31aacf9f48a5694225. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/PLA552300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76aa9be66abc8a5700eadb98b752398ac11bbffd66d0e31aacf9f48a5694225. 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/PLA552300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030f8aedacfa3fe4fa5e92ac9db58d1880853b914435df36a9a3db4a855dde14. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLA552400534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b98b2dc4110de8bc840d4bf21d675ae1c3abfa7904b8da72d949a146024906. 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/PL2DY2302481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3065af48dff457c6ff2b622bfcc8f722140016f2fdce0c6d49ed84afa5bbb97e. 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/PLA552301122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa012f83335d7852ed3805f7574991d5ae6cac68f026064c31ef1cc38e5b5342e. 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/PLA552300824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26276351cbb5f662954463f7e6d3a7ec7ae83d4543b17b49029eeee785f82a2f. 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/PLC062366618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf247ef8da5b3f083a37907601f44f9db9b55cfb2ab19ecc010a652690c054f6e. 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/PLC062392805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edc4785c5c847221e99fb1d545d2b7d1ebaee083b7ceb4b7dd7ce1eed1d89eb. 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/PLC062439435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658a8243fd895e360da6af29d7875050dcb66366ec1c6e70acda628c9c2626a4. 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/PLR902300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531c4ec9e749df3fdd047da3f9cf9e72fb91460aa489a33eb2a6a7075049ea34. 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/PLR902300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca3d1d969ff1f4d2bfc4fdbff6267e3a8f57d975ad10e8b5c575ba1d8e70671. 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/PLR902300010.