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 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 0x95d864d6de941055bb52f3727ae04f107f07782a24ac39ab60fe6e16419bacfa. 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/3d1f3a28-c80a-4b52-a3b8-4280f4ad50fd.json and https://artists.proofprofile.net/proofs/artist/3d1f3a28-c80a-4b52-a3b8-4280f4ad50fd.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 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 0x42c4f47cb77a599856a835024e30bad070e6a0ed5b007305c0239e97c75a8331. 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/QZFZ42133553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb463a06403ae9b2d927c80590a395dc34d8263959e17ee8700ad06479ef014cb. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZMEN2195167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea0bb0fe0e131981a0fad14d8145c3eb182d4b58f8c59d90489a30e63c19a79. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNWV2104312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b53c7715b59b4b0c27482bc9c28d73e994b40433e5e06c1cec34052f343cda2. 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/QZNWX2143692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75319911b0e891fdfc300b64f3fe7428a997fe926ae91de25c95abc9362b3b7. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZNWZ2191383.
A Star Shines On The Hour Of Our Meeting
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea04adeb2b84c594011ea7738dd19ffb318862e0e25e1b1ec147fd16dbbadbe. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNWW2239321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fe0c246b1921b1af010275a116d1d3b5e300b133d0c3165b4b497988cdb995. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZFZ32391721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571c838eb97766f870c7f69cca8ebca49d76bdb5ef7f6709678629a7c3331d7f. 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/QZPLS2349736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb452b0864efba6210f2c6638cffb536a923114131853c2a62ca79660edffec. 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/QZTAU2376275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bf04cfef6d0363c4cdbb62cc4a9c9401c145841a0a8c89ee4d9d3647063ad2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB22366199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84921c151008e8cca5e848eadcdf5de4a1f62317acfd0ad5f5430bfd06f4db5a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZES52472049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1fb716f310acb3e238eb69ad1bd4d49756f7b88c5a4dde3d14afa34b030c36. 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/QZES52472050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf76f02a465bd4bb928dd33022ddc3cc2a100ab94b2ff2a31a9f2bb8e843c18. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZHN52411262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcce900df5cdc45e8603856cd4296293482a53b40661b9c93fbaba609828262. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6K2400362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aebffe40efa40db8b1616bac1fab2523a74982ae56a31fba0be60c52a031d2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB62492082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2411a6447c1c5060bf34b179aaf8666f5c1578ad397476ac9862e56ff0d62d9a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTBF2484235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a9b9f85967a60cb31fd29ab95d00cb3c24dd38fe9e45a4bfce79e47a732ff1. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/QZZ772443560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd798c685f99e87a94d43a3b6f470a85bd93a38a13927fb13baf4dcffedc35cd3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7U2409436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6471838356ffbf646432395a7ed1cb9a8cf7bb999d07d42b0cf77a5d268220e2. 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/QZFZ32506258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7316690210308ecebe1ccdbf8df2fb76731a6faf0e33a119df99bd71645d89c. 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/QZES62522556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13a33532bbd2b9f5a7e04c7cee7f269313e268dba2ed1566485e4288a869c58. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNWQ2536877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b787045edd46de4b9cd2028087d602a2d1b0dfcef508f6eca9405022d718a54. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZTAZ2579684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9e028146f3ed714a3c4899d0e088dfb6262b57bd7bdb1b005229b0128c7f36. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFF2539382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e1bf21a1b0421903b6dbdc05ac9506887233db1612be74a9079fd4f55e0970. 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/QZWFM2571739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89fe682aefdc2b9d41041d293c3e7b59d4105a263b5e3f0c148e5e145ccf8b5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ792545993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3186ceebfdfe10aebba34b23b67a4babc560ac3fb1db6f96ef2652bd9ccaa8ef. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3EY2562342.