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 0xf22c609c75a0ebbb4b361d0c4152129922f2f013ea2eff914dd02766f4b255b7. 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/9e13540c-6d2e-4263-9e53-2cf073b56e64.json and https://artists.proofprofile.net/proofs/artist/9e13540c-6d2e-4263-9e53-2cf073b56e64.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 0xd8bd704c2a3199079b43777d754c37652a12a3d5db066d2bc3656e079d4e9c18. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:23:20Z), 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/TCJPK1917805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a20c8c483712068a37179394ae218c1c14fd183cab9f7f1a487044cced9adc7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:13Z), 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/JPI961600269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa07cc455bfcde481a4b24206203fccaf4d37ba5e66fc227b40f30abc2ae93d8. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/JPI961800115.
ULTRA B+K (RoughSketch Remix)(short version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bea7f8effb2d9680bf7ebee511f374cf2c0d7e9ed867dbcd88cee20f69b0df9. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:23:59Z), 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/TCJPZ2485855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeb518ef8b6e35bd35fc893f72b1dfb38dc768838defe074b081c87c560f9c0. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCJPC2483901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeb518ef8b6e35bd35fc893f72b1dfb38dc768838defe074b081c87c560f9c0. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:44Z), 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/TCJPC2483901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5fd520191763462277f92d6a3f3fb06d90beb05910b9fd8fc62da8674e0eaf. 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/TCJPX2387509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63f2259fd8ef44bf4df8b85c0b25b8926d9d42ed8f1bca94fd5a56674e4bede. 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/TCJPX2387522.
B.B.K.K.B.K.K. - Yuta Imai & anubasu-anubasu Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2da506fdb30c9d061751cdf29cd5cfd760732aa629f28b1ac289d87bd2b33c. 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/TCJPX2387519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd101ce969982842b4b4e486ea6de95d974732186034db6fc8dc6f577fcfc970f. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/TCJPX2387510.
B.B.K.K.B.K.K. - Kagetora & siqlo PsyReMix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3fa7cf9360886752c20be7c0ea4b364d59fe23bfac2e82926b15b616c944a9. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TCJPX2387512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb98bc22eaff854260f4e6b0ab41b502aad3100ed89321f09022f9032ed826f5. 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/JPP561100775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8f6ca9b8e48205e9bb8aa38e2a8660e036e365efd2ddc7ca22a4ae772f7593. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPX2387516.
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 0xe581cc86be86cab9fd332b1a15cd662a3f97cab2888c3fc0c03f206b60e576fd. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TCJPX2387526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5037b5e848f6090e553151c08c2b2cf7444860e900022a39ffe03f660f9554c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPP561100943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c0af730cce4256818ebaa27402d31827597aebb4c1c4ec17dc98e0e844d788. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCJPX2387514.
B.B.K.K.B.K.K. - Hexacube vs Xeudo Code Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a10c55ea7a631bf63422761a91e96e7504fb37de7154f0455e8d24400937260. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCJPX2387534.
B.B.K.K.B.K.K. - WAKARAN GIRL VS Kisaka Toriama Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb0d7f0363937e4847d31ae76f639c0d57681ff96f66c771da8b68f5ca8228c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCJPX2387532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854d20587dfb9ac78d2d3d74aa8bbc0844dc5b8db4b3fd41481059a1f92148a5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCJPT2251466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb14f45e70a454b1e4718b2ef7a08c807299094c2f2b740e96446e02938db8a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCJPK2058160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074c59779141ed4e084f42ba154215febb104f01789e1b71011c3a69878bccbd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCJPX2387529.