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 0x41a7295383bb20876000c8ec50760e45d54b8ddbf2f84e568ffc857b9b11c16e. 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/857db6d7-b89d-4439-aa76-a543e3451af7.json and https://artists.proofprofile.net/proofs/artist/857db6d7-b89d-4439-aa76-a543e3451af7.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 0xd17b1a507637e121f6a4c4714176ea5dfe98077b6e9f4d1d15a4f8759045d17d. 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/TCAIQ2439523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894306e66a44c71f26ef6594566c7c7abb57bbb600ee276fb47ca4077bbe2712. 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/TCAIP2476967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19d6922230d22d1fd306bc23d192b461b69b67d545f10949e0299a81a2fb371. 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/TCAIO2476453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039eff6599ba81a7fd2bf6c4543c668f20043f2931353d5afcc3f1712b2a9eb1. 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/TCAIP2452618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd672304d340955329c4a1d6a5b22d8d4397879bb7d982861cc597fae8e188f9. 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/TCAIO2429877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72989be9916b43aa5d80e50441e70b547c2be0b9a9051eb2062d789bab86c0fd. 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/TCAIO2479595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f35650f3d8f08091ddd8a632474147611911a3125aa02098cdb4713c04c3aa8. 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/TCAIN2479467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa475bfbdc17278b2e2d010a3bea8a3e0b252626d5517f6d0b9ed5f136defd45a. 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/TCAIJ2401899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ab230535c9fdc24ac2607df000feafa8210881ceb840c75c0b9697f96f819c. 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/TCAIB2440958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef865487f154e4f15d80f00b90100d68c70bdb8374950e0dfc5536c0beee8de3. 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/TCAIC2441169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95b59395b04b7544a250202bb5afe8fc48344ca5b0da7541d9f2e976febfe7b. 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/TCAIB2441112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098f892acdd3fd1a5a0c1f6c4e48ca50645b6b1c412c4327192aea885475b15a. 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/TCAIB2441018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847ace14d73ad8196e3d51283e0cd35762823badd32f60c281b7d48f97b2b72a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAIB2440969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7336fec6ce5e0c0a940b2456e356cc86bc2dd578bb7596e922907006052ec0b0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAIB2441136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22c566914fe34e3a1f1dd80d5830dc8006c390688647f3393827af3747af204. 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/TCAIB2441218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba2ec46661ccf84f40f585fc80e52333b73355cb2621b31a4472a3ced48203a. 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/TCAIB2441086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a97880e3bb7e68f279cbafb60ae4dd704d31836bad29c7487fab6e77cbc3fc5. 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/TCAIB2441193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6694d57fca22697a16dfc3412ec3c943b67b1c4a396ae62a884b725df64ed6. 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/TCAHW2466395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c428e4f7c44e24abd297e948b09ec3c35b23352aa46ab5c41367e4789eab615. 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/TCAHW2466443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6465f05df042ae4fed6930bc00118aceaeaa889ab910c126f13b96d5a5bd944f. 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/TCAHW2466512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab46c866bb4964c4441bc0f73d45658bfafc51b02f741b652c23a009b19bbb7. 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/TCAHW2466549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9d155899a8fa6c8e76950c390d878b227b3586c8eb1b90975d37101240ce6f. 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/TCAHW2466278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d542f1f0d7667c4968cc9e42e98d60eed767a9f655e597a07b6befe5d705f9d. 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/TCAHW2466307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e7bed157c5b6b4cdbc0372e7b52215f29caab12b6cd59eeba69799c7af5943. 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/TCAHW2466575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0808451962a9e99c684b683ba7b97dcd4f43a67343c186273cc897d0b1f0c9cd. 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/TCAHW2466151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355ca16f8afdcab9b8653f048bf7cf928b106802654c8b52d266806df04678a2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2465868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9813410b824fc27de62ed46a0171d3e0d3fc009fd7abf4a1d283150bae3ddc7b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2465886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7115fa029c6c4661f0f12a83a9eaa05661eadf14fa9267af530e1f8b2996b6d. 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/TCAHW2465834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7905cf747f25da5a9ce703462f9dc965dde4fe59223df088e41d8b1ed418e5f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHU2498870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70374beb4b530e6a65f3c807fc0c125f995430c1ac512a2ef332fe116164eaec. 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/TCAHU2453479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cbee88d1b8bbbfb0570c96113cf23b246e075cbcfbb8ab9d2fb332208c50fc. 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/TCAHU2453861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf946e13f0eb1ed6e63ce0699850a377334268906debfc3a5043b34acf72f42ef. 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/TCAHU2454122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26de2991cadf68fabec24c0bd35eabd39ede7e47bbfafee02c4caddc765054a3. 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/TCAHU2453971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593c89f82c6e049cb9b95a3f00f5b11abbfd6441670d906c92bc2c2c472956c1. 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/TCAHU2453397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce3ad3d192f30c973ccf2d3b326a7e4a9853d7d51a662233e1a871e2b973228. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHU2441673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0d75af0d1d73d13238011756680b5032d638d2bd8f4fbdac4add600078cd93. 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/QZDA82430603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16aa89054db308bf81fc94ff0259edc76f278aaa2fcce117c10ebe827dec1567. 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/QZFZ22469579.