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 0x518a8daba69565fa0d2f1eed03f5690129b1216dddbb1ef8a6bce860bffbbc73. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ac49c36-c87e-42ed-b440-072def12de85.json and https://artists.proofprofile.net/proofs/artist/5ac49c36-c87e-42ed-b440-072def12de85.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 0xd8a8b6cda79a8aff20e7484d176c33fbdecd3cc729282af9142cb54d34430395. 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/QMCE71301519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bce2010a14a4e2843cd636022e538ffdff2641fe46eb8fa53419f76fc764c6. 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/QMCE71301520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54104380ad23172b879952f53ee0c40bc8c971a5656e8ca47f270ed66f30ba3b. 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/QMCE71301521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2da9ac01f9c10372f3b48f3f475af62201f7da1988b7a24c1cac0582328afdf. 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/QMCE71301522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cd6190f42e48461e5fd9ba50674c55bba5787afe9857081b8fc8e28b4669d1. 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/QMCE71301523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65530effaacdd089667c7738acbd8d5b1b5454ebc426f31638e920e51d7ea9c1. 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/QMCE71301524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dc4832632c9eadafdf132fbae7fd1c26f9409b1aed32396943b25aa5db0afd. 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/QMCE71301525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba35a5d3e166dfdb70eee233b4e020475943e451a852b02be871d4ac78e0ecb7. 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/QMCE71301527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1812f06c0f991a070e6fa86851f94763f9be9cc897a8d493b8f161d00e1ae96. 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/QMCE71301528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a4bccd50659f4ecdb73e19f2a0edd8523b3507dd8b2795dfd25686628386d7. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QMCE71301526.
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 0x69a1d5ec9056534093424fd65934cae42598f62af8765647f8e7ffd506fdaeb8. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QMCE71301529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60142d446042e44c6afebb1d9170fdfc22bea45b6b8ff66747ca3f8d5e8a8af. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QMCE71301530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371279d6d3d5fdbd6b23db9bf46993894883679d2c57bfc206beb5e27f1e78bf. 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/USB4U1516101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182b9e2e6aa5d33adb377394e85f6423dbece8c6dc1357e39af35d1a3f79b03b. 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/USB4U1516102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa56354de862670692d0eb68fcef71928fcf831361b5f0687c0c6f23ded5a3a6. 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/USB4U1516103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9413677472518c63eb578846d7c78f5bf876edb346f3db7e53abfbb7f269b5. 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/USB4U1516112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79f7d45a45d58538d64a2a6cdade88ce350c9b4cdc812b3d67d653c1e3dca8b. 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/USB4U1516114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd728290ae9506cc3508bc7b72e75b452b6c27c4c8c8d8e12b9cf4f5b8b525a. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:23:26Z), 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/USB4U1516107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9ea8e95d2cdd93d9580b4b0d746642bda0a5964df56f5c86758958872e2159. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USB4U1516104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3967960e13896f98b1b80213c33818e44ed1437778f40b2b85cd49c30cae1aab. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USB4U1516105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5494368f199669405cd5ee23e0553a42a3e3a5bac9dd886d888f13e32b6f38a1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USB4U1516108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0eebab70c99b820fc70aab4dd20f56c73bb31ab86e026bea42bb33a17924d1e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USB4U1516109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a04c8cc09d7bfb5796145d8e3df6df14dcebcc7aa429ed8be5701b1d7b4ad39. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USB4U1516110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01cb26d4dcff387dfb2772db387aa1daae97776f4717f131203a214ecf9b77b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USB4U1516111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4223d40f784572103cbb23a5188fbe07757a954a3f128ec8f9250e682b3309c0. 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/USB4U1516113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc229acf4763c544553caa6e093593b1fb5344ad7a47dec2a85942e755250d40. 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/USQY51487818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21990c512e3e102b4ff9ab639e7a31f69ecbee0da2e283eaab580f61834f6bea. 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/USQY51487819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53d2c67011bb47867d90d93fea82181728d024adc1e9fb4501838c69b1f9173. 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/USQY51487820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83615d2c25fb42845937ff42002a2c8db6899fa02ddbfd9a4b32bd1fb01064a2. 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/USQY51487821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff4283666a91c637b7f5d93f7551c8bedfdb969e117ce80f4ee13c33ce9457e. 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/USQY51487822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd5a9f2c60283d6019e1e4e34f297ec01c25a8dbef8c1f5fa45bbf9f760ea4a. 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/USQY51487824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254f477709283b68d82f154b7a31d2bcea76b5d0fb1fe1957ed90144d60cd3a1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USQY51487823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f0c9d86097b6bfd2df743ab9c112da560de87c1b8a50424ac233c17829a078. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USQY51487825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa09dbb0dadf03d2c8be26c991ea798c3c7a88e00c2e331fb3360deea41acc9a. 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/USB4U1415601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17604cba7e4662bf75a38a8ef65795788ceb22c1e381c64bcb574b15378259b. 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/USB4U1415602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e28e8508edc3dfa7d17a4aa440ed6773acc308356d436d574bb8fab5da383b. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USB4U1415603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba0d1e9ad2412f63cbf5e42961167f3fda66758a4490ae20c0b6f15ca47b634. 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/USB4U1415604.