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 0xc0945b1766d904be32d7b7ee0f5a63ff4db1376cefea67aca55266f9f61f1198. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdd3307a-ad9a-46e8-816f-bd57657ee1c2.json and https://artists.proofprofile.net/proofs/artist/cdd3307a-ad9a-46e8-816f-bd57657ee1c2.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 0xe8a87ae8aa05930f8ecbf3679d4daaca609044f70a3b138fa5108bb822bf6283. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ42098265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3c011b1170bd26fff2dedef3de25708b98381d3a19c0e96d7dc7f87bb9a201. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:34:45Z), 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/QZFZ52046573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852882ab4e5563fb6ab193d441d7d75f3ccf7f3244bcfdd5eaab694d96176b25. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN92049182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259ff303b10cea252408454e8473a907654ed0d1b60f6d957128918b7f53e553. 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/QZHNB2031564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bc7cca4ac127d8edbacf33d25bce5796e48cb33bf0837d8af32e58ea0ab5d5. 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/QZNWQ2091299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f624e4fd77f6ad72e5e346d5d10d337ddd437239fe8e119a7772e02aea702b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZFZ62101821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9825eee112c79f95a4935c09968dc60c84d2de786801bd99d50f635585264a7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA42134014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02f010f8b1026580c432e8067e4f6eb423c92fa391b9ab3980e3c55098b09a1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES52160264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e891e0fa5b537130743f10545341ccafd59d4c18ac1e4b3102244517f66613. 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/QZHN72146459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10120b6eda5cc011889384718177c7776500bae3bcd364d021c3166db40cb389. 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/QZMEN2181386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b79d575f00c40f2a6a4780ddd3dc04e66656384de41c118f631f5b2e2011b83. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNWX2199578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf903cd701cfb1a58242172be59f7fbbc0292030b230c2b503c752f36303f52. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZFYZ2275738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722cb9e876589f6663165bc1c9738d9bffd71f030db42551f50f5f610d0e669c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM4TX2213000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc717aa84ee0583f4b6ba733fb552a226e05c4c7f48afdb4845c52e16440a0a64. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHN62209037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493ef0ac767af816854e106153cc93ef23f7d23d57a73f02b31035bbf44ccd0a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6MZ2221260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d6b5e954e5dfbff3f12491df51b0d35bc45be5fdd1e60a61e3eb4c42e059d0. 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/QZHNB2204058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a6788abc39fa9786759a7b1619034cfdab94cec42aa3e6b1e0948c236935bb. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:03:35Z), 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/QZK6G2270504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67a0fe805376fa9c2990c527e220f5ad858c24eb9c9048252729342a3b71758. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QM6N22293806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b34b0dfe6ecdecac494ae07d319687bd0fa5a2ef7f8e2f1d7941c149d670b1. 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/QZNWQ2222533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa692424bf1e4a7770fd1032eee11a31070223668242fe22ae5ae6fbd7e19a871. 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/QZRP52235717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289239ac0cf4d361ab4e02097d07de58fcf80472529da15a0eb9e6c543944c91. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB42222777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ed59b7df4ad57817ead7c742311ac0ea48e2e6c52bfd18bad4cf70d6054395. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ22361490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08b5ca2447aceeb7d4dfcc075867d8a2e277969adceed3e37d1b355fa804464. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDA82309428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84cc452f77cb635a74644369e9907f985aa4856a90184c756fda74d7041c20b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:15:55Z), 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/QZES72325904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24541bd31c22705b065486abe8774f9ce3b206a7efa8b59ec1cac50d2dcd087. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZK6K2347993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc581a8819f19d787285da9e2dcb7377a35523159829d1b5edecfed91831cd9a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:37:01Z), 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/QZK6G2397621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93da2c3172ffba84549bb4cebeffa68bbcfb5eff6eb3e8dfd57e5ebaccdf355e. 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/QZMEN2325617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063871ea557be0b4d14f9efc3698f3ba44e4e9b2d1144c2350edbb9c32f0c761. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/UKZGC2305682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dfdc0a38d8b169ebc5974475b89059ad82a3be1f261ed453de01df09d72b9c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/UKZGC2306482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fa956ab755a1e2b0bcf3e1eb62f7275ebed88cc718f1f670e80e985086d1ca. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:57Z), 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/QZZ662429793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf697d69f36532e234578419c146a0930462fa78bc8db57c395ed852e05ee6e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPEW2424588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9fc4fb7515874fce59ee9f98e696cca7b3802b4c06563aea49d87636a832b6. 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/QT2VB2427166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdd220edbe255bbd4afd330992628c10732362ff37b4e647b37be3b0cf2fb3c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWV32571996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3623c8fa797205e0a5e77d22b0fba9acaa925bd0010de592d127a2eaa860be. 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/UKZGC2308184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6dff0b082db342c2f104c4211655e7a5162989845b879a0c7b01aa2b5dd6d5. 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/QZVEM2324226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba3b7177e9b3b1585930b3f5fb9963599120588c8e26e2176f7031c79e46534. 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/QZPEW2415579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c7b2c98d2a05266d96377403d121cafb68d89420a9d8fe074ccb2a835234e4. 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/QZTAY2264205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49ee12772ef014e1d222d152e58e823ac159b214f80dd50af060d62699bdbc7. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNMW2408482.