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 0x4cc287332964b5f186260227de8512da3ed85baf2895110bf0ea14b2aed0acfb. 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/d62e7e69-de87-4838-9793-e4bba5b4a65c.json and https://artists.proofprofile.net/proofs/artist/d62e7e69-de87-4838-9793-e4bba5b4a65c.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 0xbe0ee6e0fe19b1d58bd9322cf9e5a6e8e362fa975aaf95c5675f011bb565f932. 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/TCJPN2036899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804e13909e6a2126368bd1874a4b6fda04bcfed504625137e1c641f624590dad. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCJPO2167664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fb943c8a88d8d97efc4c8dc2f212679567c5a2e41c9bbedee1dbd4b44da854. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPU902200348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290bc48bdccd9d72775b3ab316c3f036b9257b5137e790967201130885c7d20f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:49:12Z), 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/JPU902201169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754bd316a487e1d1f2b414b6e0c12f0441db20a4d66008f14b39e3d432b42570. 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/JPU902201927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ecce49b1ebfbff82ce4bb7a09babb18fcf63f6fe4f81edb10d461c4ca790bb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/JPU902202133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8965a1ef5d826424ef864d0ef4398f48d76c4533a0de7f3911dfd6ead7187de4. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:41:15Z), 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/JPU902202490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6276e49907fbb559f8490f1f4d9b44a829bbbe7a9a8aeb721e651f5cfb4fd4b4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPU902203088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290bc48bdccd9d72775b3ab316c3f036b9257b5137e790967201130885c7d20f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:55:36Z), 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/JPU902201169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65f067a8366ba94bea200183dada6b2c11dfb2cc09f7169fea2fd500611bedf. 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/JPU902200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5db724c681cc6f19563dbc54312761dc0ea04509e5e11586d04172b54afeb91. 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/JPU902105605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754bd316a487e1d1f2b414b6e0c12f0441db20a4d66008f14b39e3d432b42570. 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/JPU902201927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095f321afe863e793ca8c2593925e2bcd4ec8fd5c9f20fa09898c047412ce47d. 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/JPU902204345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fb943c8a88d8d97efc4c8dc2f212679567c5a2e41c9bbedee1dbd4b44da854. 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/JPU902200348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804e13909e6a2126368bd1874a4b6fda04bcfed504625137e1c641f624590dad. 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/TCJPO2167664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf157b532b218267dd378e7fe1e2113431c89270456e54204a38640c165c761aa. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:00:12Z), 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/JPU902202807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9425bb8deee8571327ec88b3244546cf08fa9445b28158ae5ec31123652cc424. 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/JPU902303182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe822c95d58196ddce132ecde296349bec2d487b01587817f0986cd95fab89faa. 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/JPU902303557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1e528959c28c95ddddd94b4ff497e3abba1840c0165c23e3caeb6274c5e006. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:10Z), 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/JPU902303845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39969c5d7f26e4af95339599ff71eb218c603fd734de0125a7923fd74f573a90. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/JPU902304767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1211c15fb5a5d4da9990917c0e2c888a0d7415113352502afc9d279e62650dc. 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/JPU902402165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc8f1b98681c5a05b38eafda0849312bb00333a29d87c67fcb89472bbb27eff. 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/JPPO02202523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc8f1b98681c5a05b38eafda0849312bb00333a29d87c67fcb89472bbb27eff. 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/JPPO02202523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3234463e3f492ef3db5a22aa1972cfb148491eaac359e6542c6f4a723c9d55f7. 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/JPU902203242.