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 0x6300fd48bd24a66c6bd2d9576f362eb87367031028ff25f9c2722ebbad313bb3. 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/cc97180a-853b-4982-911f-7886029ea402.json and https://artists.proofprofile.net/proofs/artist/cc97180a-853b-4982-911f-7886029ea402.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 0x44fb28e4bebc293fb756a6c68b77f0f799c001427c16d001d1f01210aebf81f9. 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/TWDL72500285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea4dd73e45f49a9e82eeb41304f7dc20ba14e3b544d74952c5179791db12c85. 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/TWDL72500286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755dd7e9aedeaae689f2d62a643085a0dffdac96b6fea1f2dfec93f292846d3b. 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/KJTZE8453685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676aa5b897b895aca1c868eb41cd00bcf6f723664984da97c47510110634ee86. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KJM1C4723822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddeb4cd3f96a7fd430d40810402e81bc452d9d77ca823230e5948e1892eddc4a. 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/HKG732503139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c58f2700147205faca6c853aaa4cd428bbfe238056eedca3c24b1c1f51d7ae2. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/HKG732503140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0af32e9b59e7b700f0b36176bcd206dba66ab440b3bb043e33637fece816d8. 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/KJI2E2338530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a09636f5aa3ff8e8a1c7b283f2e0b00df6324cd990769cb1fcae40f879eabe1. 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/KJDLD4419696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d1b8a60a772f290fcc16b97fe136f77a8fcf12225483b72dbde13f9682a048. 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/FR10S2523859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00753ab4dfe77e007b9dc6324131eff28a58d70167b78ff6c7f00d36379a60bc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR10S2523860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd627cbd38f3591f00ceeb79c9e817cfebffee4b7ef7330509a988f47a75dafd2. 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/HKD012373588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e5a4f90dfc1e8f707f93fd9b6c21c836294f9bca6eb82e4dcdc28c772559b4. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HKD012373575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9959fbd34ac1724dcbdc24b34495fc98eec98318a4f1f794b50195d27fb9cdfc. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/HKD012374836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c23283a92270ae4f7880fdc2eabd26a281ad9d276ac6cffea272826c79eb60e. 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/HKD012374480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad544d94a3a7d4f0c419109350567e1a7f0372da18e15c46d15582afdadafe80. 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/KJBCY6265776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31809317ebfd098482b3d3892e49ffd07463b5b0dff8262645c424c11fcff1ce. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/HKD012370447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10531e325d2dfd6924b0ed74aa01ee92a8c38ac7583e4e14b028aa6b81f4e02. 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/HKC992724127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458bed7b1b263085eddfd789f5750f2cd10de7ee86ca3e7bf4de3885418b29a2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DGA0T2447034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab90e92066dec708621afd3d29ed44a2ea067b2859dd6c776e252f08f67ad2d4. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DGA0S2427153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d80d5360a1da19660e04a18884c9e460fe0da7bb17293149019b2c7b6683d74. 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/QNSM12400746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b14ae7e6af8ead80e84f57dcd5170971102b0446066c6f1075a79cac8861ee. 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/HKG732486284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c611f33a3960385f50be48ce6a953093432856aa897765917be60bed8f24dbe. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DGA0S2437716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afd4e31c9fda045d71894fd0bd71e418a82ce7c79dd44af6de775f1ff1c9ae7. 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/QNSM12400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac15955a8bce7bd2db6ec240b16d4fc7be68e372465316fdff43a9eb35d4bf1. 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/QT3T42423521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceba838e72c22d456c9f3d3eba7ed4ba870a268a5aeb9711d8980b8090a4f0c2. 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/HKC992625041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27982fca831170e60eea05747db15fca3ab25570aedb1c9c97cc48bda59ca49f. 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/DGA0R2422184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d23f36ef897777bf72d88c733828a64053c6fd32dbb79da30cf3fb2a3c02ff. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0Q2436221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007bd8b896dd2701be556a1160aa4442bfa4ec3ec64eae3064c34e68d2cb1fa0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QT3T42423478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff5bf65c3c36e9726ff7cede74a7608401252465b70d8402d282fb944645f28. 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/DGA0R2422361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05b844cca2c0aec0964825cfc819a88bab59449009f23fc3f603a8589e99bbc. 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/DGA0Q2414383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ef69b0d36c7d39ed9419ea11a465c9f773279bd342e7c6fde8399cce78316a. 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/DGA0Q2407751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafdbabedb34c9cef3482d5072b826782986bc5dfd6520a70656c853eab2509e. 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/DGA0Q2407753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20ec29cb1c4e128a24a257822d76844bc73777074b6a433f2591c94cf5c78da. 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/HKC992624623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273f9912b4ef4fcaf74198817cb780858c201fe4a0b3d8236b73f43c45aa1319. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/HKG732481387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156107f55c3068511c04664f799cb359ca61af6c8155461857bf63a09a7feb06. 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/HKC992624044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cd57b1c21332006947d591b0fa9d84d7fc3b1a18c4d9e95fa622cc15c4331e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/KJJC53276091.