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 0x2d7fe8e4dcb7a4ca443b2ea584f9d40ed99f95a48138b5cda1b3acabf8585687. 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/87817c2a-da74-47f7-af3c-6318142a6214.json and https://artists.proofprofile.net/proofs/artist/87817c2a-da74-47f7-af3c-6318142a6214.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 0x73bb41706d14dba7b8a499b3485b7bf8654d830a203b4b6405df4ebeb1cfa241. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ51925040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1790717031bdbb1fd31b3b3d33d070c195ec1694848cbb28e6de7620b8ec420f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZHZ31914699.
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 0xe66159f4805caed6e16681d6e6541c7e8fee4add04dc5c894dcd192fce2bac43. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1832200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1334829515e94536c039cb7194faa337b6a96664916a78ad7e62b69b0ae7a0d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US7VG1832202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d9372ba3351837e59b16f9fc06dcbfdedd5871b02cc084e417edafd6caa757. 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/BXJK02300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b16a0487e74bad890ad063a1a91f6a91ad60dc5d8dec435e67b54179d2d42af. 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/BXX522300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f20fda770c2d6f31599e9969b0e0d6031c02fa01cea6a376c39475bd825098. 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/BXYC42300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523a1c91f6400dc1a6d04af0a741b44efdc72be292b952288cb2dd588c04ffb8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMZ92234890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcd5ba809167740bcfeaf3a93e86192fd937303496a5dbce5f37aa9a0cb4312. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHZ62139029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3993807958ea2d504464bea5d5b673811738b2e5dbd22d24ea07562fb87f5ce. 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/BR1LO1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a00d0299c4330bfab43b2bd86e46e0dcad384c066f1db1a37cbe598bdd6ba0. 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/QZYFZ2445787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fbcc6fddfea2f33dde933e6d4e481954cbc39397af3dd98ea696db7bbd1eb8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXX522400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0b82ece35e82d46444cabde04f6719f9aaa01ccebfbb565b11bca38b82a1f9. 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/BXX522400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67688fc319541f250bf14b47685ae0acf3ab6e80ba34617b237b75a5aadec0eb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1861580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dba9b7e1a8adaff563d532a89d5767800f76713edc061ed72159b3038b84ff. 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/US7VG1861581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d451e108671e53144c3808f73a7ec2afcb2f025fa3f9244bf16c9a0e0445d8. 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/US7VG1861582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6070ae56f1045cc91f30bbdd797c9e66a5c3f71560616f0a0eb29ebfca06899f. 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/US7VG1861583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa995833b35bd1a334d044362c06175eb10abc70003ea339e0326f32d2adc1de8. 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/US7VG1861584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52014f34c5aaeb183c70f230c91ad207a7d312c0abc73955a21ccb00aab4ceb0. 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/US7VG1861585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c9d9f0bb5d73816a40b3ed5cd6c9cc3dcd50042048061df77dfd7c2a597986. 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/US7VG1861586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf713d85373a5d65e584cf19fb2f9039be288811bd643f51dc849565f411fa9. 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/US7VG1861587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5ddd61e11447d08c2793cf36696314e31580b9f247b9fe1afd8db9a331a05c. 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/US7VG1861588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34220f1da941b06f721012f0ca4a846ab3acb7c5a3f6da131f51db7bcaba72f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1861589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e109ea2a41007f41fa587c98368570145d27fb600691ebb95d0907f4c614d3. 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/BXD1K1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3547bda44a6627165ab32592b6722693d39a66071d26d221c1f8c4dd29fa9d8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BXD1K1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43646f6caf07b9aef25b8f7415a333f8fb1d358d04de38a70f17133aa1a23099. 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/BXD1K1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f829364e1672c87b8b851b5cc2004fcf5b4f0fa185efcdff8925d6ed9fa7b91. 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/BXD1K1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217515aa0df63a514ef0fbb0c17e5bd9cb0b31e6b5bf6d3cc46ceecb89e30cc2. 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/US7VG1618311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd699d58529b11865eed8daaab58fea2d196d98a22c635c686417003a3b17f4c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US7VG1618313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aab14b602280b61440d2cb2d9384975f64a042af77ad9c91f4fa8f27cfd266b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1618320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243ab548817e707c78f6e0383835dba056c9014e2cf42e4e9e6d68ae09a34d51. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1618321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c36baa122e89c641fbc96df2f52254ae5ee10885ac9e6d843319d871813f3e. 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/US7VG1618322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fe5e486b25125f0f3d47abfab108494e3d50436ee154844c1cbfab6b00806a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US7VG1618314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511cae24b1a4b33b87f84173b9ecd1a0bf526e6ddc26f39a24c5f879fe9fa67c. 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/QZHZ32025718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30db9eea4ee7ee8601fb9abbf6d2fec14c867b184b0ba448e6b61338e595fa5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ5AB1989326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39edaa07a84820dbca046c9d80ac8e1f33f677d41b4ae6025b085e9d56fd60e4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXD1K1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8c8a2988d2b0fd603ec34770e24f3344195145a8e6a9ed99caaec344afc689. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXR5F1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe891d6a62a8445a05c91cb5f49063cbfe14a34150aad6bb12408d7cbdcca93fc. 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/BRUM72302075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1513c08e67d9469d6cc882f4861ba6aaea39693aece353ab6e52eb777ce5fd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRUM72302077.