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 0xc653fe842a6be9c29f012f483db4a8d5950cc0de423f913615778f4d849c2332. 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/917d5c79-bc47-46cf-aa20-2078ae3e1bc2.json and https://artists.proofprofile.net/proofs/artist/917d5c79-bc47-46cf-aa20-2078ae3e1bc2.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 0x8969ac9c0fae0f4bdd76b21ffb6e19bb32fbb2bc819d1a2ca6ddc1febf83b290. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZES52116143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f54027685be39fe34ff65f770a97e0d2cfdf360f8868e0a33ba77d44ad18cf6. 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/QZES52184102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda5a2cb35e6faae9a8a8b08b40197048477cea26131b318782b9f33db52e3f9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZES52186189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391d1692b5bab1e3bc50e95dbada9da075b193bb60bb5b374d82dac9ea9f58d1. 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/QZES52188173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b68db22fbbbf0bb2c591517a3815d2d92f2bfdb04aa05bf2a417537e695720a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZFZ32335391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ee256319f90ba87e724a4b900a5f66803251377335bbbde596994beaca5df2. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZES52188178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fbedcd3be8ce57711b6d6566675f62a8e33c03a082b15d722b93f5aa625b78. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES52186209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96fd2d54ce35a22606e2d5b66b4223e0fff27a66dc025dd4e1884d27e99b4e5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES52186212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272ead06056e85975d994deea9f3d200ef4cc296823987a9972022009b34fe1b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52186214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e36a2faa8f0d8ed70b80b9f305ce9a0b1e925945d6155004150fc4afffaa329. 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/QZES52188196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba7e117ea7bd7286095a3cf0ffe580e12583b095664804450d37707ddf3c348. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:34:47Z), 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/QZES52188198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61716d39d51ae57a477fb1a7ea30028149225fa75eac3c22ad7f91ddfb4e341. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES52186242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04291e7594f80c6a2b67643248315f83b3b4b00ee2cd9be6dccfeac02b1b89c6. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:01:44Z), 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/QZES52186264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf09ec6257ae43ef1b1f34ac251a98902bbc95a1847805a82a9b2928a2f9376. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZES52186265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3831d9ffe417c47503c6332eef502492b492e882dee2d8e9295f1671d45bd0f. 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/QZES52186273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378f9090caa047fa79b0543cd3be08cc3de9b48d82a4a432e64fe546d57e0b26. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES52186286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673518866d59378e2bbcf347430e959c9e47b9f61ed344671ac9c708c2bcd15b. 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/QZES52188229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eed180858f64384663e8c23b37f37eb18ed5dbf19001e53036bb8dbe8d732f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52190308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8651914fbbb4cf74d0f768f487d558cfbb535d3715526e60abe21c7a1bae9223. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZES52188270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3540a6f50745fb7a2d5f00f7234fa99f5a5f674d7064f2a7a5d958cb7884c3ba. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES52188299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fb15d8e9e2c9aba391adbacf45e1dca3744d01505428f1705442a916d1bc0c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWZ2071929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148da385c3579f7bfca3cd7b57b7c659e9221dc18c8366a0acd29fe0ddf41a44. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ52184610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6adcb569af670b1d28934796839fd48ac1732acefde89c7d240093ac79b2df3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES52190352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eef2cf26342858526005eff23f30894446f64fced6e26624937772fef9e2a9. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:23:11Z), 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/QZES52190359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea7d93fcaebc1a3bd134887b5d1095262fd4ad0cf344d74ac81e1d5248156f9. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:09:58Z), 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/QZNWX2048811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4038abf5fd3e794443ed8d287571a79e736826083674fcfb902a03c5ea984a59. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWZ2071934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c03068cd9bdc73ad00fafc5710aa96aa47d1685d2f0ac8950440a6ce49b28ab. 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/QZTB42274401.