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 0xb718a6c5321d2c69c2d5d44f7039fbff8bc91c21d1115287d22bcc126d4d5d25. 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/3b246f22-7df3-4533-a863-379ef74dc014.json and https://artists.proofprofile.net/proofs/artist/3b246f22-7df3-4533-a863-379ef74dc014.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 0xc27e4f87a89071f3118e6f6c49b24201ac9100ea56157db2d5660cf17e5c52e7. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DELJ81819957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b66e8b43b4f970fa68ed7bdfa6ac3845d314793dc65c7564e1ea07676588bb2. 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/DELJ81914649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2261e2abd20dec33825471f57a0b707ea9f7728365ac75d308b22b2660bbc3. 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/DELJ81943347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db35edb4619ddcd8b94e7271cb22e454a692f8c324a858f679eb571285deeae. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/DELJ81943349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddad227115f3f950af3d471077e9009445d9fd6115f05f71fa9abebf0b6fd5a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DELJ81939621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b26cde1ff4efb956382364b7f68a6a4970273c87afc69f70022266639b523a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DELJ82016314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a57a9958f58d6a1932a5cf63c40a5a94fafaadf20c50a50eb87456426cad02. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/DELJ82069391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005443799d645728c21b712019e5df218531545e9b75e851f2d6413e2b914e6c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DEZC62037906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec2009fdc18899bb784cd24cec08fe1c466db1042b1a67583d577fd3ce3d019. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZC62174935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e208bab9312cf4005b931d0837efc364ba394637ad9600305716ca5a158e54. 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/DEZC62190343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17091af84a227cd092c8048f1c99b20554ca187a73c5674ea43741a8e6074438. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEZC62115089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c17c14e9fa69df29567c3f7b30721cf2761edc628236be8be47a4ae21e7386e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEZC62117396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb84d6164dac5d895fe1067775a36b2a9e0aedb2fe8397d0bbdc398dfb3ff937. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZC62127788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6824175b436543137585eedb0e8273baea598bd31069bfdd510fb0bd5ce44abc. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/DEZC62203968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a71a310e371f85a5a8632a03218f329c5a478a4f9e521641db6b64af02c57e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEZC62203969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be6ee42a80933642ad982d5e92cd1a73502c47cd070cf5f602712aff843f15f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DELJ82004427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6659e09fa5c0fca0e1832f5b3b926c2c66201a6802d7e2192ff87dbb9272b84e. 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/DEZC62319135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c55f34112005da4566e871c1ffebdba245fc714688aa4ea671f97a00528889. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CH7812350632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c002250f9f57b390c17dc6061eb2ada78fe8b8bf23b2067e0efb352f73b1526. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH7812350633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdd849d6e918af306338be4009fdb3049128951ce3916ab1b47517b3f43db09. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CH7812350634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2db6f0c04aca2f2ea1e34dcb22a47b32fed857eb15a7ce6ade2a9a05db990b0. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CH7812357682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5663df7544adba776274ee3392335103864763a8036054de053a4996131d91e. 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/CH7812359023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecf7e2538ba66bea25c9157fcfed622fea08c812da584224c9ffd0fd89aaed0. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/CH7812407629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b39d90df65a6c99ccc482b72fedb6276f33c8b33c36d06403083528ff59d5a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH7812413697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfda0b989330446956547aac8fb453554441a2dc2ef68bec15e5938724664b6. 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/CH7812416498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b45ae7b4b6f1418e354f621ac5096e91c741e33d153914d2b9ffa5e342c2aa7. 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/CH7812419704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8f90ff633415571a23df4c7d796fb05ee1de0fff46176ffb01b99cf6f65cdb. 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/CH7812420791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c84fe0e0a463cb775717512f23f31bb02eae4f557942ad24166a656d629f1c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR10S2170097.